25 Nov 11:04

xcguang

921b955

v5.0.0.0 Latest

Latest

v5.0.0.0 Release Notes

v5.0.0.0 is released for ESP32-C5 and ESP32-C61. It is the first released version of AT firmware for ESP32-C5 and ESP32-C61.

ESP32C5-AT
ESP32C61-AT

ESP32C5-AT

Documentation for Release v5.0.0.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v5.0.0.0/esp32c5/index.html.

Please contact Espressif Sales or [email protected] for AT firmware suitable for the ESP32-C5 series chips. If you contact us via email, please include "Request ESP32-C5 AT Firmware Download Link" in the subject line, and provide the following information in the email body: your company name, the Espressif product you are using, project name, application scenario, project start date, expected mass production date, project status, annual estimated purchase quantity, and the required AT firmware version.

Known Issues

When ESP32-C5 is reconnecting to an AP, the AT+CWMODE command may fail when switching Wi-Fi mode (1->3 or 3->1). Workaround: Send AT+CWQAP first to stop the reconnection, then send AT+CWMODE again.

Features

Basic AT Commands

AT: Test AT startup.
AT+RST: Restart a module.
AT+GMR: Check version information.
AT+CMD: List all AT commands and types supported in current firmware.
AT+GSLP: Enter Deep-sleep mode.
ATE: Configure AT commands echoing.
AT+RESTORE: Restore factory default settings of the module.
AT+SAVETRANSLINK: Set whether to enter Network/Bluetooth Passthrough Mode on power-up.
AT+TRANSINTVL: Set the data transmission interval in the Passthrough Mode.
AT+UART_CUR: Current UART configuration, not saved in flash.
AT+UART_DEF: Default UART configuration, saved in flash.
AT+SLEEP: Set the sleep mode.
AT+SYSRAM: Query the heap memory status.
AT+SYSMSG: Query/Set System Prompt Information.
AT+SYSMSGFILTER: Enable or disable the system message filter.
AT+SYSMSGFILTERCFG: Query/Set the system message filters.
AT+SYSFLASH: Query/Set User Partitions in Flash.
AT+SYSMFG: Query/Set manufacturing nvs User Partitions.
AT+RFPOWER: Query/Set RF TX Power.
AT+RFCAL: RF full calibration.
AT+SYSROLLBACK: Roll back to the previous firmware.
AT+SYSTIMESTAMP: Query/Set local time stamp.
AT+SYSLOG: Enable or disable the AT error code prompt.
AT+SLEEPWKCFG: Query/Set the light-sleep wakeup source and awake GPIO.
AT+SYSSTORE: Query/Set parameter store mode.
AT+SYSREG: Read/write the register.

Wi-Fi AT Commands

AT+CWINIT: Initialize/Deinitialize Wi-Fi driver.
AT+CWMODE: Set the Wi-Fi mode (Station/SoftAP/Station+SoftAP).
AT+CWBANDMODE: Query/Set Wi-Fi band mode.
AT+CWBANDWIDTH: Query/Set Wi-Fi bandwidth.
AT+CWSTATE: Query the Wi-Fi state and Wi-Fi information.
AT+CWCONFIG: Query/Set Wi-Fi inactive time and listen interval time.
AT+CWJAP: Connect to an AP.
AT+CWRECONNCFG: Query/Set the Wi-Fi reconnecting configuration.
AT+CWLAPOPT: Set the configuration for the command AT+CWLAP.
AT+CWLAP: List available APs.
AT+CWQAP: Disconnect from an AP.
AT+CWSAP: Query/Set the configuration of an ESP32-C5 SoftAP.
AT+CWLIF: Obtain IP address of the station that connects to an ESP32-C5 SoftAP.
AT+CWQIF: Disconnect stations from an ESP32-C5 SoftAP.
AT+CWDHCP: Enable/disable DHCP.
AT+CWDHCPS: Query/Set the IPv4 addresses allocated by an ESP32-C5 SoftAP DHCP server.
AT+CWAUTOCONN: Connect to an AP automatically when powered on.
AT+CWAPPROTO: Query/Set the Wi-Fi protocol standard of SoftAP mode.
AT+CWSTAPROTO: Query/Set the Wi-Fi protocol standard of station mode.
AT+CIPSTAMAC: Query/Set the MAC address of an ESP32-C5 station.
AT+CIPAPMAC: Query/Set the MAC address of an ESP32-C5 SoftAP.
AT+CIPSTA: Query/Set the IP address of an ESP32-C5 station.
AT+CIPAP: Query/Set the IP address of an ESP32-C5 SoftAP.
AT+CWSTARTSMART: Start SmartConfig.
AT+CWSTOPSMART: Stop SmartConfig.
AT+WPS: Enable the WPS function.
AT+CWHOSTNAME: Query/Set the host name of an ESP32-C5 station.
AT+CWCOUNTRY: Query/Set the Wi-Fi Country Code.

TCP/IP AT Commands

AT+CIPV6: Enable/disable the network of Internet Protocol Version 6 (IPv6).
AT+CIPSTATE: Obtain the TCP/UDP/SSL connection information.
AT+CIPDOMAIN: Resolve a Domain Name.
AT+CIPSTART: Establish TCP connection, UDP transmission, or SSL connection.
AT+CIPSTARTEX: Establish TCP connection, UDP transmission, or SSL connection with an automatically assigned ID.
[Data Mode Only] +++: Exit from the data mode.
AT+SAVETRANSLINK: Set whether to enter Wi-Fi Passthrough Mode on power-up.
AT+CIPSEND: Send data in the normal transmission mode or Wi-Fi normal transmission mode.
AT+CIPSENDL: Send long data in parallel in the normal transmission mode.
AT+CIPSENDLCFG: Set the configuration for the command AT+CIPSENDL.
AT+CIPSENDEX: Send data in the normal transmission mode in expanded ways.
AT+CIPCLOSE: Close TCP/UDP/SSL connection.
AT+CIPCONNPERSIST: Query/Set TCP/SSL connection persistence.
AT+CIFSR: Obtain the local IP address and MAC address.
AT+CIPMUX: Enable/disable the multiple connections mode.
AT+CIPSERVER: Delete/create a TCP/SSL server.
AT+CIPSERVERMAXCONN: Query/Set the maximum connections allowed by a server.
AT+CIPMODE: Query/Set the transmission mode.
AT+CIPSTO: Query/Set the local TCP Server Timeout.
AT+CIPSNTPCFG: Query/Set the time zone and SNTP server.
AT+CIPSNTPTIME: Query the SNTP time.
AT+CIPSNTPINTV: Query/Set the SNTP time synchronization interval.
AT+CIPFWVER: Query the existing AT firmware version on the server.
AT+CIUPDATE: Upgrade the firmware through Wi-Fi.
AT+CIPDINFO: Set “+IPD” message mode.
AT+CIPSSLCCONF: Query/Set SSL clients.
AT+CIPSSLCCIPHER: Query/Set the cipher suite of the SSL client.
AT+CIPSSLCCN: Query/Set the Common Name of the SSL client.
AT+CIPSSLCSNI: Query/Set SSL client Server Name Indication (SNI).
AT+CIPSSLCALPN: Query/Set SSL client Application Layer Protocol Negotiation (ALPN).
AT+CIPSSLCPSK: Query/Set SSL client Pre-shared Key (PSK) in string format.
AT+CIPSSLCPSKHEX: Query/Set SSL client Pre-shared Key (PSK) in hexadecimal format.
AT+CIPRECONNINTV: Query/Set the TCP/UDP/SSL reconnection interval for the Wi-Fi normal transmission mode.
AT+CIPRECVTYPE: Query/Set socket receiving mode.
AT+CIPRECVDATA: Obtain socket data in passive receiving mode.
AT+CIPRECVLEN: Obtain socket data length in passive receiving mode.
AT+PING: Ping the remote host.
AT+CIPDNS: Query/Set DNS server information.
AT+MDNS: Configure the mDNS function.
AT+CIPTCPOPT: Query/Set the socket options.

Bluetooth® Low Energy AT Commands

AT+BLEINIT: Bluetooth LE initialization.
AT+BLEADDR: Query/Set Bluetooth LE device address.
AT+BLENAME: Query/Set Bluetooth LE device name.
AT+BLESCANPARAM: Query/Set parameters of Bluetooth LE scanning.
AT+BLESCAN: Enable Bluetooth LE scanning.
AT+BLESCANRSPDATA: Set Bluetooth LE scan response.
AT+BLEADVPARAM: Query/Set parameters of Bluetooth LE advertising.
AT+BLEADVDATA: Set Bluetooth LE advertising data.
AT+BLEADVDATAEX: Automatically set Bluetooth LE advertising data.
AT+BLEADVSTART: Start Bluetooth LE advertising.
AT+BLEADVSTOP: Stop Bluetooth LE advertising.
AT+BLECONN: Establish Bluetooth LE connection.
AT+BLECONNPARAM: Query/Update parameters of Bluetooth LE connection.
AT+BLEDISCONN: End Bluetooth LE connection.
AT+BLECFGMTU: Set Bluetooth LE MTU length.
AT+BLEGATTSSRV: GATTS discovers services.
AT+BLEGATTSCHAR: GATTS discovers characteristics.
AT+BLEGATTSNTFY: Notify a client of the value of a characteristic value from the server.
AT+BLEGATTSIND: Indicate the characteristic value from the server to a client.
AT+BLEGATTSSETATTR: GATTS sets characteristics.
AT+BLEGATTCPRIMSRV: Generic Attributes Client (GATTC) discovers primary services.
AT+BLEGATTCINCLSRV: GATTC discovers included services.
AT+BLEGATTCCHAR: GATTC discovers characteristics.
AT+BLEGATTCRD: GATTC reads characteristics.
AT+BLEGATTCWR: GATTC writes characteristics.
AT+BLESPPCFG: Query/Set Bluetooth LE SPP parameters.
AT+BLESPP: Enter Bluetooth LE SPP mode.
AT+SAVETRANSLINK: Set whether to enter Bluetooth LE Passthrough Mode on power-up.
AT+BLESECPARAM: Query/Set Bluetooth LE encryption parameters.
AT+BLEENC: Initiate Bluetooth LE encryption request.
AT+BLEKEYREPLY: Reply the key value to the peer device.
AT+BLECONFREPLY: Reply the confirm value to the peer device in the legacy connection stage.
AT+BLEENCDEV: Query bonded Bluetooth LE encryption device list.
AT+BLEENCCLEAR: Clear Bluetooth LE encryption device list.
AT+BLESETKEY: Set Bluetooth LE static pair key.
AT+BLUFI: Start or Stop BluFi.
AT+BLUFINAME: Query/Set BluFi device name.
AT+BLUFISEND: Send user-customized data over BluFi.
AT+BLEPERIODICDATA: Set Bluetooth LE periodic advertising data.
AT+BLEPERIODICSTART: Start Bluetooth LE periodic advertising.
AT+BLEPERIODICSTOP: Stop Bluetooth LE periodic advertising.
AT+BLESYNCSTART: Start to synchronize with periodic advertising.
AT+BLESYNCSTOP: Stop synchronizing with periodic advertising.
AT+BLEREADPHY: Query the current transmitter PHY.
AT+BLESETPHY: Set the current transmitter PHY.

MQTT AT Commands

AT+MQTTUSERCFG: Set MQTT user configuration.
AT+MQTTLONGCLIENTID: Set MQTT client ID.
AT+MQTTLONGUSERNAME: Set MQTT username.
AT+MQTTLONGPASSWORD: Set MQTT password.
AT+MQTTCONNCFG: Set configuration of MQTT connection.
AT+MQTTALPN: Set MQTT Application Layer Protocol Negotiation (ALPN).
AT+MQTTSNI: Set MQTT Server Name Indication (SNI).
AT+MQTTCONN: Connect to MQTT brokers.
AT+MQTTPUB: Publish MQTT messages as strings.
AT+MQTTPUBRAW: Publis...

Assets 2

14 Aug 06:12

xcguang

v2.3.0.0_esp8266

795c42d

v2.3.0.0_esp8266

ESP8266-AT Release v2.3.0.0

The documentation for ESP-AT v2.3.0.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v2.3.0.0_esp8266/

This release is a minor update to ESP-AT v2.2.2.0.

The firmware:

ESP-WROOM-02-AT-V2.3.0.0.zip

Breaking Changes

Updated ESP8266_RTOS_SDK to commit c965e03d, upgrading the bundled mbedtls library from v2.16.5 to commit 1d34215a (a few commits after v3.6.3). Important: If you want to use this version firmware, please ensure your server is compatible with mbedtls commit 1d34215a before proceeding. If it works fine, you can upgrade your products by AT+CIUPDATE=0,"v2.3.0.0".

Feature

Added the AT+CIPSSLCCIPHER command to configure the SSL cipher‑suite list

Bugfix

Fixed a potential SSL reconnection failure in passthrough mode when the SNI/CN/PSK/ALPN parameters were set before entering passthrough mode

Assets 2

01 Aug 07:52

xcguang

v4.1.1.0

7c092f9

v4.1.1.0

v4.1.1.0 Release Notes

v4.1.1.0 is released for ESP32-C2, ESP32-C3, ESP32-C6, ESP32, and ESP32-S2. The changes since the previous version are as follows.

ESP32C2-AT
ESP32C3-AT
ESP32C6-AT
ESP32-AT
ESP32S2-AT

ESP32C2-AT

Documentation for Release v4.1.1.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v4.1.0.0/esp32c2/index.html. ESP32C2-AT v4.1.1.0 is a minor update for ESP32C2-AT v4.1.0.0.

The firmware:

This is the list of changes since release v4.1.0.0:

Known Issues

AT+FS may fail after repeated read/write operations

Bugfix

Fixed a potential system hang when using AT+MQTTSUB with QoS 1, triggered by a fast SUBACK response from the broker
Fixed a potential system hang when executing AT+MQTTPUB with QoS 1 or 2, AT+MQTTSUB with QoS 1, or AT+MQTTUNSUB, if the ESP does not receive the corresponding PUBACK, SUBACK, or UNSUBACK within 30 seconds,
while MQTT PING messages are still being exchanged normally.

ESP32C3-AT

Documentation for Release v4.1.1.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v4.1.0.0/esp32c3/index.html. ESP32C3-AT v4.1.1.0 is a minor update for ESP32C3-AT v4.1.0.0.

The firmwares:

ESP32-C3-MINI-1-AT-V4.1.1.0.zip

This is the list of changes since release v4.1.0.0:

Known Issues

AT+FS may fail after repeated read/write operations

Bugfix

Fixed a potential system hang when using AT+MQTTSUB with QoS 1, triggered by a fast SUBACK response from the broker
Fixed a potential system hang when executing AT+MQTTPUB with QoS 1 or 2, AT+MQTTSUB with QoS 1, or AT+MQTTUNSUB, if the ESP does not receive the corresponding PUBACK, SUBACK, or UNSUBACK within 30 seconds,
while MQTT PING messages are still being exchanged normally.

ESP32C6-AT

Documentation for Release v4.1.1.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v4.1.0.0/esp32c6/index.html. ESP32C6-AT v4.1.1.0 is a minor update for ESP32C6-AT v4.1.0.0.

The firmwares:

ESP32-C6-4MB-AT-V4.1.1.0.zip

This is the list of changes since release v4.1.0.0:

Known Issues

AT+FS may fail after repeated read/write operations

Bugfix

Fixed a potential system hang when using AT+MQTTSUB with QoS 1, triggered by a fast SUBACK response from the broker
Fixed a potential system hang when executing AT+MQTTPUB with QoS 1 or 2, AT+MQTTSUB with QoS 1, or AT+MQTTUNSUB, if the ESP does not receive the corresponding PUBACK, SUBACK, or UNSUBACK within 30 seconds,
while MQTT PING messages are still being exchanged normally.

ESP32-AT

Documentation for Release v4.1.1.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v4.1.0.0/esp32/index.html. ESP32-AT v4.1.1.0 is a minor update for ESP32-AT v4.1.0.0.

The firmwares:

This is the list of changes since release v4.1.0.0:

Known Issues

AT+FS may fail after repeated read/write operations
After sending the AT+BLUFI=1 command, if the device was previously in SoftAP or Station+SoftAP mode, the SoftAP interface may briefly restart.

Bugfix

Fixed a known issue where AT+BLUFI after disabling and re-enabling BLUFI without power cycling, BLE advertising may fail to start.
Fixed a potential system hang when using AT+MQTTSUB with QoS 1, triggered by a fast SUBACK response from the broker
Fixed a potential system hang when executing AT+MQTTPUB with QoS 1 or 2, AT+MQTTSUB with QoS 1, or AT+MQTTUNSUB, if the ESP does not receive the corresponding PUBACK, SUBACK, or UNSUBACK within 30 seconds,
while MQTT PING messages are still being exchanged normally.

ESP32S2-AT

Documentation for Release v4.1.1.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v4.1.0.0/esp32s2/index.html. ESP32S2-AT v4.1.1.0 is a major update for ESP32S2-AT v3.4.0.0.

The firmwares:

ESP32-S2-MINI-AT-V4.1.1.0.zip

This is the list of changes since release v3.4.0.0:

Known Issues

AT+FS may fail after repeated read/write operations

Changelog

Basic

Added the AT+SYSRAM setup command to detail memory capacity
Added the AT+SYSROLLBACK query command to obtain the address and version of the current and rollback firmware
Added the AT+RFCAL command to support RF full calibration
Added deduplication support for the AT+SYSMFG command
Added sleep support in the BLE‑only firmware
Added support to disable sleep when Wi‑Fi and BLE coexist
Fixed an issue where AT+SYSMSGFILTER did not work when the data contained \r\n

Wi-Fi

Added the AT+CWBANDWIDTH command to set Wi‑Fi bandwidth
Added the AT+CWCONFIG command to set the global inactive time and listen interval
Expand authmode range for AT+CWLAPOPT, AT+WPS, AT+CWSTARTSMART and AT+BLUFI
Fixed a station‑connection failure when using AT+CWJAP after connecting to an Enterprise AP with AT+CWJEAP
Fixed a crash when setting hostname length to 32 bytes via AT+CWHOSTNAME
Fixed two WPA2‑Enterprise connection issues
Fixed a potential Wi‑Fi issue where the device disconnected immediately after powering on and connecting to the AP
Fixed an issue where AT+CWLAP did not return valid APs when BLUFI was enabled
Fixed incorrect Wi‑Fi reconnection behavior after sending the AT+CWQAP and AT+CWRECONNCFG commands
Fixed a Wi‑Fi disconnection issue when sending the AT+CWRECONNCFG command twice

TCP/IP

Added a netif parameter to the AT+CIPSERVER command
Added the AT+CIPSSLCCIPHER command to configure the SSL cipher‑suite list
Added a timeout parameter to the AT+CIPSTART and AT+CIPDOMAIN commands
Added support for a backup DNS server in AT+CIPDNS
Fixed AT+CWDHCP returning an incorrect DHCP state after the DHCP server was disabled
Fixed an issue where AT+CIPRECVLEN? always returned a fixed set of five connections
Fixed several issues where AT+CIPSTATUS returned incorrect statuses
Fixed an infinite‑loop issue when the SSL server encountered a PKI read error
Fixed some potential reconnection issues in passthrough mode
Fixed an issue where TLS resources were not freed if TLS negotiation failed
Fixed an issue where AT+CIPCLOSE could not close a connection after reaching the maximum number of open sockets
Fixed an issue where the UDP mode in AT+CIPSTART did not work in passive‑read mode
Fixed an asynchronous issue with AT+CIPRECVLEN
Fixed an issue where AT+CIPSTO did not take effect when data transmission failed

mDNS

Added mDNS query support to AT+MDNS
Added the instance, proto, and txt parameters to the AT+MDNS command

HTTP

Added HTTP status‑code output for HTTP commands
Added the AT+HTTPCFG command to configure certificates for HTTP
Added HTTP‑header deduplication to the AT+HTTPCHEAD command

MQTT

Change MQTT message retransmission interval from 1 second to 5 seconds to improve connection stability
Fixed an issue where an MQTT QoS 2 PUBREL packet might not be retransmitted
Fixed a potential system hang when executing AT+MQTTPUB with QoS 1 or 2, AT+MQTTSUB with QoS 1, or AT+MQTTUNSUB, if the ESP does not receive the corresponding PUBACK, SUBACK, or UNSUBACK within 30 seconds,
while MQTT PING messages are still being exchanged normally.

FatFS

Added FatFS support on 2 MB flash
Added a data‑length check when writing to FatFS
Fixed several FatFS mount and unmount issues
Fixed a mismatch between the generated fatfs.bin size and the required size
Fixed an issue where FatFS did not work if fatfs.bin was not pre‑burned before flashing
Fixed an issue where fwrite() returned OK but data was not written to the file system

OTA

Enabled app rollback support
Added compressed OTA v3 support and a sanity checker

WebServer

Fixed a compilation error when WebSocket and info logging we...

Assets 2

18 Jul 12:44

xcguang

v4.1.0.0

9e9fe15

v4.1.0.0

v4.1.0.0 Release Notes

v4.1.0.0 is released for ESP32-C2, ESP32-C3, ESP32-C6, and ESP32. The changes since the previous version are as follows.

ESP32C2-AT
ESP32C3-AT
ESP32C6-AT
ESP32-AT

ESP32C2-AT

Documentation for Release v4.1.0.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v4.1.0.0/esp32c2/index.html. ESP32C2-AT v4.1.0.0 is a major update for ESP32C2-AT v3.3.0.0.

The firmware:

This is the list of changes since release v3.3.0.0:

Known Issues

AT+FS may fail after repeated read/write operations

Changelog

Basic

Added the AT+SYSRAM setup command to detail memory capacity
Added the AT+SYSROLLBACK query command to obtain the address and version of the current and rollback firmware
Added the AT+RFCAL command to support RF full calibration
Added deduplication support for the AT+SYSMFG command
Added sleep support in the BLE‑only firmware
Added support to disable sleep when Wi‑Fi and BLE coexist
Fixed an issue where AT+SYSMSGFILTER did not work when the data contained \r\n

Wi-Fi

Added the AT+CWBANDWIDTH command to set Wi‑Fi bandwidth
Added the AT+CWCONFIG command to set the global inactive time and listen interval
Expand authmode range for AT+CWLAPOPT, AT+WPS, AT+CWSTARTSMART and AT+BLUFI
Fixed a station‑connection failure when using AT+CWJAP after connecting to an Enterprise AP with AT+CWJEAP
Fixed a crash when setting hostname length to 32 bytes via AT+CWHOSTNAME
Fixed two WPA2‑Enterprise connection issues
Fixed a potential Wi‑Fi issue where the device disconnected immediately after powering on and connecting to the AP
Fixed an issue where AT+CWLAP did not return valid APs when BLUFI was enabled
Fixed incorrect Wi‑Fi reconnection behavior after sending the AT+CWQAP and AT+CWRECONNCFG commands
Fixed a Wi‑Fi disconnection issue when sending the AT+CWRECONNCFG command twice
Fixed an issue where IPv6 information was output in passthrough mode

TCP/IP

Added a netif parameter to the AT+CIPSERVER command
Added the AT+CIPSSLCCIPHER command to configure the SSL cipher‑suite list
Added a timeout parameter to the AT+CIPSTART and AT+CIPDOMAIN commands
Added support for a backup DNS server in AT+CIPDNS in AT+CIPDNS
Fixed AT+CWDHCP returning an incorrect DHCP state after the DHCP server was disabled
Fixed an issue where AT+CIPRECVLEN? always returned a fixed set of five connections
Fixed several issues where AT+CIPSTATUS returned incorrect statuses
Fixed an infinite‑loop issue when the SSL server encountered a PKI read error
Fixed some potential reconnection issues in passthrough mode
Fixed an issue where TLS resources were not freed if TLS negotiation failed
Fixed an issue where AT+CIPCLOSE could not close a connection after reaching the maximum number of open sockets
Fixed an issue where the UDP mode in AT+CIPSTART did not work in passive‑read mode
Fixed an asynchronous issue with AT+CIPRECVLEN
Fixed an issue where AT+CIPSTO did not take effect when data transmission failed

mDNS

Added mDNS query support to AT+MDNS
Added the instance, proto, and txt parameters to the AT+MDNS command

HTTP

Enabled HTTP commands on the esp32c2‑2mb firmware
Added HTTP status‑code output for HTTP commands
Added the AT+HTTPCFG command to configure certificates for HTTP
Added HTTP‑header deduplication to the AT+HTTPCHEAD command

MQTT

Change MQTT message retransmission interval from 1 second to 5 seconds to improve connection stability
Fixed a potential issue where MQTT subscribe via AT+MQTTSUB failed but returned OK
Fixed an issue where an MQTT QoS 2 PUBREL packet might not be retransmitted

FatFS

Added FatFS support on 2 MB flash
Added a data‑length check when writing to FatFS
Fixed several FatFS mount and unmount issues
Fixed a mismatch between the generated fatfs.bin size and the required size
Fixed an issue where FatFS did not work if fatfs.bin was not pre‑burned before flashing
Fixed an issue where fwrite() returned OK but data was not written to the file system

OTA

Enabled app rollback support
Added compressed OTA v3 support and a sanity checker

WebServer

Fixed a compilation error when WebSocket and info logging were enabled
Fixed two slist issues where the pointer fail_item was used after free
Fixed a potential crash when printing if the SSID length was 32 bytes
Fixed an issue where AT‑Web netconfig failed when used with the WeChat applet

WebSocket

Added additional parameters to the AT+WSCFG command to configure certificates in WebSocket

Bluetooth

Fixed AT command response interleaving issues causing data corruption
Fixed AT command response issues where the \r character was missing
Added BLE light sleep support on esp32c2
Added BLE adv type information
Fixed missing +BLESCANDONE issue
Resolved data loss issue in BLE passthrough mode
Optimized BLE WRITE/INDICATE flow control mechanism
Fixed crash in BLE transparent transmission mode
Fixed AT+BTENCCLEAR not properly clearing BT pairing information
Fixed BLE_TT_MODE printed twice in BLE passthrough mode
Fixed missing +WRITE response
Fixed BLUFI memory leak
Fixed issue where MTU size greater than attribute length caused data transmission failure
Fixed that AT+RFPOWER query not returning BLE power when using nimble protocol
Fixed extra +BLEDISCONN message when sending AT+BLEDISCONN=0

Interface

Optimized the UART1 clock source
Fixed a potential crash when AT was not ready but received data
Fixed a potential UART voltage fluctuation during light sleep
Fixed some socket interface issues
Fixed an SDIO compilation warning
Fixed a heap‑corruption issue when using the SDIO interface

System

esp-idf version updated to ~v5.4.2
Added an unfilled factory binary
Added a checker to prevent duplicate keys in *.defaults
Added some return value checks for driver commands
Added pre_wakeup_callback and process_light_sleep hook events
Added a hook function for memory allocation failure
Added the esp_at_ready_before() API to perform tasks before ESP‑AT is ready
Added the at_exe_cmd() API to execute AT commands via ESP‑AT itself
Supported the new log system and improved log readability
Added support to configure the default system storage mode
Added support to print the firmware source
Added support to override default configurations
Optimized resources to increase available RAM
Reduced power consumption when a beacon is lost
Optimized the root CMake file
Decoupled Wi‑Fi and BLE functions from the base commands
Renamed esp_at_get_netconn_count() to esp_at_get_netconn_max_count()
Exposed esp_at_get_smartconfig_start_config() API
Reconfigured TWDT to disable the panic trigger when AT debug is enabled
Provided some weak symbols to allow external overriding (esp_at_nvs_set_xxx/esp_at_nvs_get_xxx/esp_at_log_write)
Fixed an issue where the factory binary was not generated in some cases
Fixed an issue where patches could not be applied on Windows
Fixed several MCU wake‑up issues

Optimization

TCP & SSL: TCP/SSL connections are now proactively closed immediately when their associated netif state changes (netif down, stop, or lost IP). In previous versions, the connections would remain open until a keep-alive timeout, send timeout, or max retry threshold was reached - often taking tens of seconds to close. This change significantly reduces latency in connection teardown and improves system responsiveness.
Upgraded supported python version and some package versions
Optimized patching process
Replaced the previous script with esptool.py merge_bin
Fixed a potential issue where the patch is applied multiple times
Fixed an issue where gatts_cfg was excessively modified by the at.py script

Examples

Added a fatfs_to_http_server example
Added a http_get_to_fatfs example
Added a WebSocket example document
Added an AT interface security example

Documentation

Improved documentation for AT commands, examples, and development
Added richer content for new features and changes
Added a chatbox on docs.espressif.com/projects/esp-at
Added a disclaimer for the esp-at project
Added some document format checks

ESP32C3-AT

Documentation for Release v4.1.0.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v4.1.0.0/esp32c3/index.html. ESP32C3-AT v4.1.0.0 is a major update for ESP32C3-AT v3.3.0.0.

The firmwares:

ESP32-C3-MINI-1-AT-V4.1.0.0.zip

This is the list of changes since release v3.3.0.0:

Known Issues

AT+FS may fail after repeated read/write operations

Changelog

Basic

Added the AT+SYSRAM setup command to detail memory capacity
Added t...

Assets 2

26 Mar 07:07

xcguang

v2.2.2.0_esp8266

4274148

v2.2.2.0_esp8266

ESP8266 AT Release v2.2.2.0

The documentation for ESP-AT v2.2.2.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v2.2.0.0_esp8266/. This release is a minor update to ESP-AT v2.2.1.0.

ESP-WROOM-02-AT-V2.2.2.0.zip

Breaking Changes Since Release v2.2.1.0

ESP8266_RTOS_SDK version update: Upgraded to release v3.4 (ff16a35c).
Disclaimer update: Included an important disclaimer for ESP-AT.

1. Feature

Added the AT+USERWKMCUCFG and AT+USERMCUSLEEP commands to wake up MCU.
Added the AT+CIPSSLCCIPHER command to specify ssl cipher suite.
Added AT+CIPSTATE command to query connection state.
Added fallback DNS server. AT has two DNS servers ("208.67.222.222" and "8.8.8.8") by default.
Added the AT+MQTTLONGCLIENTID command to set MQTT client ID.
Added the AT+MQTTLONGUSERNAME command to set MQTT username.
Added the AT+MQTTLONGPASSWORD command to set MQTT password.
AT+WEBSERVER: Wi-Fi provisioning supports the special character in SSID and password.

2. Bugfix

2.1 Wi-Fi

Fixed an issue where AT+CWJAP occasionally returned an incorrect reason code.
Fixed an issue where AT+CWSTATE occasionally returned an incorrect state.
Fixed a potential crash when the lSSID length was exactly 32 bytes or the password length was 64 bytes.
Fixed an issue where AT+CWLAP occasionally returned an ERROR.
Fixed an auto-connection issue with WPA2 Enterprise AP. Users should always use AT+CWJEAP to connect to a WPA2 Enterprise AP.
Fixed an issue where the +CWJAP error code might be printed before the "WIFI DISCONNECT" message.

2.2 TCP/IP

Fixed an issue where the AT+CIPDNS query command returned an incorrect configuration.
Fixed an issue where AT+CIPSERVER=0,1 did not correctly close clients connected to the ESP TCP server.
Fixed an issue where setting AT+CIPSERVER=5 returned "Have 255 Connections" sometimes.
Fixed an issue where AT+CIPTCPOPT send timeout parameter failed to work sometimes.
Fixed an issue with active TCP data writes in passive mode.
Fixed an occasional crash in passthrough mode caused by a socket close.
Fixed +IPD report loss when the TCP connection was reopened while AT was acting as a server.
Fixed an occasional failure when AT+CIPSERVERMAXCONN=5 was set.
Fixed an issue where AT+CIPSTO did not reset the timer after sending data.
Fixed an ssl connection issue where the connection was dropped after receiving data when AT+CIPRECVMODE=1 was used.
Updated the "+IPD" command to report actual ssl available bytes whenever possible, except when TCP buffers data but SSL does not.
Fixed a potential illegal assignment issue with the AT+CIPTCPOPT command in multiple connections.
Fixed an issue where AT+CIPTCPOPT did not work when ESP-AT operated as a server.
Fixed an issue where AT+CIPSTART could not establish multiple UDP transmissions on the same port.
Fixed an occasional disconnection issue when the link state changed.
Corrected an invalid maximum number of tcp retransmission.
Fixed an issue where the maximum parameter length for AT+CIPSSLCCN and AT+CIPSSLCSNI could not be set to 64 bytes.

2.3 Application

Removed extra space in AT+HTTPCLIENT HEAD response.
Fixed an issue where AT+HTTPCPOST response returned the wrong command name when additional POST data was appended.

2.4 System

Fixed an issue of high power consumption after power-on when AT+CWMODE=0 was set.
Fixed a potential issue where uart data was blocked in the RX ring buffer.
Fixed several potential busy p... issues occurring occasionally.
Fixed a problem where GPIO15 did not function correctly in custom modules based on ESP8266.
Fixed an occasional system hang caused by a deadlock.
Fixed a crash occurring when invalid GPIO wake-up configurations were set.

3. Optimization

Removed potential NVS writes at startup when dirty data was detected during NVS read operations.
Enhanced handling of multiple connections by ensuring all available bytes from one link are read before processing the next.
Added parameters validation for the AT+CIPTCPOPT command.

Assets 2

26 Mar 02:26

xcguang

v3.3.1.0

ad23a35

v3.3.1.0

ESP32-C2 AT Release v3.3.1.0

Documentation for Release v3.3.1.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v3.3.1.0/esp32c2/index.html. ESP32-C2 AT v3.3.1.0 is the first released version of AT firmware for ESP32-C2 ECO4 (Rev v2.0) series chips.

The firmwares:

Feature

Basic AT Commands

AT: Test AT startup.
AT+RST: Restart a module.
AT+GMR: Check version information.
AT+CMD: List all AT commands and types supported in current firmware.
AT+GSLP: Enter Deep-sleep mode.
ATE: Configure AT commands echoing.
AT+RESTORE: Restore factory default settings of the module.
AT+SAVETRANSLINK: Set whether to enter Passthrough Mode on power-up.
AT+TRANSINTVL: Set the data transmission interval in the Passthrough Mode.
AT+UART_CUR: Current UART configuration, not saved in flash.
AT+UART_DEF: Default UART configuration, saved in flash.
AT+SLEEP: Set the sleep mode.
AT+SYSRAM: Query current remaining heap size and minimum heap size.
AT+SYSMSG: Query/Set System Prompt Information.
AT+SYSMSGFILTER: Enable or disable the system message filter.
AT+SYSMSGFILTERCFG: Query/Set the system message filters.
AT+SYSFLASH: Query/Set User Partitions in Flash.
AT+SYSMFG: Query/Set manufacturing nvs User Partitions.
AT+RFPOWER: Query/Set RF TX Power.
AT+SYSROLLBACK: Roll back to the previous firmware.
AT+SYSTIMESTAMP: Query/Set local time stamp.
AT+SYSLOG: Enable or disable the AT error code prompt.
AT+SLEEPWKCFG: Query/Set the light-sleep wakeup source and awake GPIO.
AT+SYSSTORE: Query/Set parameter store mode.
AT+SYSREG: Read/write the register.

Wi-Fi AT Commands

AT+CWINIT: Initialize/Deinitialize Wi-Fi driver.
AT+CWMODE: Set the Wi-Fi mode (Station/SoftAP/Station+SoftAP).
AT+CWSTATE: Query the Wi-Fi state and Wi-Fi information.
AT+CWJAP: Connect to an AP.
AT+CWRECONNCFG: Query/Set the Wi-Fi reconnecting configuration.
AT+CWLAPOPT: Set the configuration for the command AT+CWLAP.
AT+CWLAP: List available APs.
AT+CWQAP: Disconnect from an AP.
AT+CWSAP: Query/Set the configuration of an ESP32-C2 SoftAP.
AT+CWLIF: Obtain IP address of the station that connects to an ESP32-C2 SoftAP.
AT+CWQIF: Disconnect stations from an ESP32-C2 SoftAP.
AT+CWDHCP: Enable/disable DHCP.
AT+CWDHCPS: Query/Set the IPv4 addresses allocated by an ESP32-C2 SoftAP DHCP server.
AT+CWAUTOCONN: Connect to an AP automatically when powered on.
AT+CWAPPROTO: Query/Set the 802.11 b/g/n protocol standard of SoftAP mode.
AT+CWSTAPROTO: Query/Set the 802.11 b/g/n protocol standard of station mode.
AT+CIPSTAMAC: Query/Set the MAC address of an ESP32-C2 station.
AT+CIPAPMAC: Query/Set the MAC address of an ESP32-C2 SoftAP.
AT+CIPSTA: Query/Set the IP address of an ESP32-C2 station.
AT+CIPAP: Query/Set the IP address of an ESP32-C2 SoftAP.
AT+CWSTARTSMART: Start SmartConfig.
AT+CWSTOPSMART: Stop SmartConfig.
AT+WPS: Enable the WPS function.
AT+MDNS: Configure the mDNS function.
AT+CWJEAP: Connect to a WPA2 Enterprise AP.
AT+CWHOSTNAME: Query/Set the host name of an ESP32-C2 station.
AT+CWCOUNTRY: Query/Set the Wi-Fi Country Code.

TCP/IP AT Commands

AT+CIPV6: Enable/disable the network of Internet Protocol Version 6 (IPv6).
AT+CIPSTATE: Obtain the TCP/UDP/SSL connection information.
AT+CIPSTATUS (deprecated): Obtain the TCP/UDP/SSL connection status and information.
AT+CIPDOMAIN: Resolve a Domain Name.
AT+CIPSTART: Establish TCP connection, UDP transmission, or SSL connection.
AT+CIPSTARTEX: Establish TCP connection, UDP transmission, or SSL connection with an automatically assigned ID.
[Data Mode Only] +++: Exit from the data mode.
AT+SAVETRANSLINK: Set whether to enter Wi-Fi Passthrough Mode on power-up.
AT+CIPSEND: Send data in the normal transmission mode or Wi-Fi normal transmission mode.
AT+CIPSENDL: Send long data in paraller in the normal transmission mode.
AT+CIPSENDLCFG: Set the configuration for the command AT+CIPSENDL.
AT+CIPSENDEX: Send data in the normal transmission mode in expanded ways.
AT+CIPCLOSE: Close TCP/UDP/SSL connection.
AT+CIFSR: Obtain the local IP address and MAC address.
AT+CIPMUX: Enable/disable the multiple connections mode.
AT+CIPSERVER: Delete/create a TCP/SSL server.
AT+CIPSERVERMAXCONN: Query/Set the maximum connections allowed by a server.
AT+CIPMODE: Query/Set the transmission mode.
AT+CIPSTO: Query/Set the local TCP Server Timeout.
AT+CIPSNTPCFG: Query/Set the time zone and SNTP server.
AT+CIPSNTPTIME: Query the SNTP time.
AT+CIPSNTPINTV: Query/Set the SNTP time synchronization interval.
AT+CIPFWVER: Query the existing AT firmware version on the server.
AT+CIUPDATE: Upgrade the firmware through Wi-Fi.
AT+CIPDINFO: Set “+IPD” message mode.
AT+CIPSSLCCONF: Query/Set SSL clients.
AT+CIPSSLCCN: Query/Set the Common Name of the SSL client.
AT+CIPSSLCSNI: Query/Set SSL client Server Name Indication (SNI).
AT+CIPSSLCALPN: Query/Set SSL client Application Layer Protocol Negotiation (ALPN).
AT+CIPSSLCPSK: Query/Set SSL client Pre-shared Key (PSK) in string format.
AT+CIPSSLCPSKHEX: Query/Set SSL client Pre-shared Key (PSK) in hexadecimal format.
AT+CIPRECONNINTV: Query/Set the TCP/UDP/SSL reconnection interval for the Wi-Fi normal transmission mode.
AT+CIPRECVTYPE: Query/Set socket receiving mode.
AT+CIPRECVDATA: Obtain socket data in passive receiving mode.
AT+CIPRECVLEN: Obtain socket data length in passive receiving mode.
AT+PING: Ping the remote host.
AT+CIPDNS: Query/Set DNS server information.
AT+CIPTCPOPT: Query/Set the socket options.

Bluetooth® Low Energy AT Commands (ESP32-C2-4MB-G2 only)

AT+BLUFI: Start or Stop BluFi.
AT+BLUFINAME: Query/Set BluFi device name.
AT+BLUFISEND: Send user-customized data over BluFi.

MQTT AT Commands

AT+MQTTUSERCFG: Set MQTT user configuration.
AT+MQTTLONGCLIENTID: Set MQTT client ID.
AT+MQTTLONGUSERNAME: Set MQTT username.
AT+MQTTLONGPASSWORD: Set MQTT password.
AT+MQTTCONNCFG: Set configuration of MQTT connection.
AT+MQTTALPN: Set MQTT Application Layer Protocol Negotiation (ALPN).
AT+MQTTSNI: Set MQTT Server Name Indication (SNI).
AT+MQTTCONN: Connect to MQTT Brokers.
AT+MQTTPUB: Publish MQTT Messages in string.
AT+MQTTPUBRAW: Publish long MQTT messages.
AT+MQTTSUB: Subscribe to MQTT topics.
AT+MQTTUNSUB: Unsubscribe from MQTT topics.
AT+MQTTCLEAN: Close MQTT connections.

HTTP AT Commands (ESP32-C2-4MB-G2 only)

AT+HTTPCLIENT: Send HTTP Client Request.
AT+HTTPGETSIZE: Get HTTP Resource Size.
AT+HTTPCGET: Get HTTP Resource.
AT+HTTPCPOST: Post HTTP data of specified length.
AT+HTTPCPUT: Put HTTP data of specified length.
AT+HTTPURLCFG: Set/Get long HTTP URL.
AT+HTTPCHEAD: Set/Query HTTP request headers.

User AT Commands

AT+USERRAM: Operate user’s free RAM.
AT+USEROTA: Upgrade the firmware according to the specified URL.
AT+USERWKMCUCFG: Configure how AT wakes up MCU.
AT+USERMCUSLEEP: MCU indicates its sleep state.
AT+USERDOCS: Query the ESP-AT user guide for current firmware.

Assets 2

04 Nov 10:40

xcguang

v3.2.1.0

e4aa658

v3.2.1.0

v3.2.1.0 Release Notes

v3.2.1.0 is released for ESP32. The changes since the v3.2.0.0 are as follows.

ESP32-AT

Documentation for Release v3.2.1.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v3.2.0.0/esp32/index.html. ESP32-AT v3.2.1.0 is a minor update for ESP32-AT v3.2.0.0.

The firmwares:

This is the list of changes since release v3.2.0.0:

Optimization

Optimized the time cost of the AT+BLEGATTSSRVCRE command by removing some logs

Assets 2

07 Jun 11:38

xcguang

v3.4.0.0

70ff588

v3.4.0.0

v3.4.0.0 Release Notes

v3.4.0.0 is released for ESP32 and ESP32-S2. The changes since the previous version are as follows.

ESP32-AT
ESP32S2-AT

ESP32-AT

Documentation for Release v3.4.0.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v3.4.0.0/esp32/index.html. ESP32-AT v3.4.0.0 is a major update for ESP32-AT v3.2.0.0.

The firmwares:

This is the list of changes since release v3.2.0.0:

Breaking Changes

esp-idf version updated to v5.0.6
RF power: Fixed the issue that the actual wifi transmit power didn't match the settings. The default configuration of wifi transmit power is 19.5 dBm, but the actual wifi transmit power may be slightly lower than the settings. This is because the wifi transmit power is limited by your country code according to phy_multiple_init_data.bin configuration. In the current version, esp-at disabled multiple phy init data bin to improve the wifi transmit power (rf power is no longer limited by your country code).

1. Feature

1.1 TCP/IP

Added the AT+CIPRECVTYPE command to set recv mode for each connection
AT+CIPRECVLEN query command can return the real data length now

1.2 Application Layer

AT+MQTTCONNCFG: Enlarged lwt msg length to 128 bytes
Added the AT+MQTTSNI command to set MQTT server name indication

2. Bugfix

2.1 Wi-Fi

AT+CWLAP: Fixed an issue where executing AT+CWLAP may return an ERROR when the AT+CWRECONNCFG command is sent immediately after the Wi-Fi disconnection

2.2 TCP/IP

AT+PING: Fixed an issue that cannot ping a linklocal ipv6 address
Fixed an ssl issue where "CLOSED" was output before reading all data in passive mode
Fixed a potential ssl crash caused when mbedtls dynamic buffer feature is used and an ssl renegotiation occurs
Fixed an issue where esp-tls is unable to parse ECC keys

2.3 System

Fixed the issue that AT could not work immediately after restart and prompt ready
Fixed an AT+SYSFLASH crash issue if a large amount of data is read
Fixed a potential GPIO voltage fluctuation issue during light-sleep

2.4 Bluetooth

Fixed BLE don't print ble connection params update fail issue
Fixed BLE memory leak issue

3. Optimization

Optimized sntp startup delay and receive timeout to speed up sntp time acquisition
Re-organized the gitlab ci
Re-organized the main directory of the esp-at repository
Added some debug options to allow different kinds of esp-at debug output

ESP32S2-AT

Documentation for Release v3.4.0.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v3.4.0.0/esp32s2/index.html. ESP32S2-AT v3.4.0.0 is a major update for ESP32S2-AT v2.1.0.0.

The firmware:

ESP32-S2-MINI-AT-V3.4.0.0.zip

This is the list of changes since release v2.1.0.0:

Breaking Changes

esp-idf version updated to v5.0.6

1. Feature

1.1 Basic

Added more Basic AT commands:

AT+CMD: List all AT commands and types supported in the current firmware.
AT+TRANSINTVL: Set the data transmission interval in the Passthrough Mode.
AT+SYSMSGFILTER: Enable or disable the system message filter.
AT+SYSMSGFILTERCFG: Query/Set the system message filters.
AT+SYSMFG: Query/Set manufacturing nvs User Partitions.
AT+SYSREG: Read/write the register.

1.2 Wi-Fi

Added more Wi-Fi AT commands:

AT+CWINIT: Initialize/Deinitialize Wi-Fi driver.
AT+CWSTATE: Query the Wi-Fi state and Wi-Fi information.
AT+CWRECONNCFG: Query/Set the Wi-Fi reconnecting configuration.

1.3 TCP/IP

Added more TCP/IP AT Commands:

AT+CIPV6: Enable/disable the network of Internet Protocol Version 6 (IPv6).
AT+CIPSTATE: Obtain the TCP/UDP/SSL connection information.
AT+CIPSENDL: Send long data in parallel in the normal transmission mode.
AT+CIPSENDLCFG: Set the configuration for the command AT+CIPSENDL.
AT+CIPSNTPINTV: Query/Set the SNTP time synchronization interval.
AT+CIPFWVER: Query the existing AT firmware version on the server.
AT+CIPSSLCCN: Query/Set the Common Name of the SSL client.
AT+CIPSSLCSNI: Query/Set SSL client Server Name Indication (SNI).
AT+CIPSSLCALPN: Query/Set SSL client Application Layer Protocol Negotiation (ALPN).
AT+CIPSSLCPSK: Query/Set SSL client Pre-shared Key (PSK) in string format.
AT+CIPSSLCPSKHEX: Query/Set SSL client Pre-shared Key (PSK) in hexadecimal format.
AT+CIPRECVTYPE: Query/Set socket receiving mode.

1.4 MQTT

Added more MQTT AT Commands:

AT+MQTTLONGCLIENTID: Set MQTT client ID
AT+MQTTLONGUSERNAME: Set MQTT username
AT+MQTTLONGPASSWORD: Set MQTT password
AT+MQTTALPN: Set MQTT Application Layer Protocol Negotiation (ALPN)
AT+MQTTSNI: Set MQTT Server Name Indication (SNI)

1.5 HTTP

Added more HTTP AT Commands:

AT+HTTPCGET: Get HTTP Resource
AT+HTTPCPOST: Post HTTP data of specified length
AT+HTTPCPUT: Put HTTP data of specified length
AT+HTTPURLCFG: Set/Get long HTTP URL
AT+HTTPCHEAD: Set/Query HTTP request headers

1.6 User

Added new User AT Commands:

AT+USERRAM: Operate user’s free RAM.
AT+USEROTA: Upgrade the firmware according to the specified URL.
AT+USERWKMCUCFG: Configure how AT wakes up MCU.
AT+USERMCUSLEEP: MCU indicates its sleep state.
AT+USERDOCS: Query the ESP-AT user guide for the current firmware.

2. Attention

Due to the long time without a new firmware release for ESP32-S2, this release has significant changes. If you want to know more information, please refer to some ESP32 release notes:

Assets 2

09 May 03:03

xcguang

v3.3.0.0

be33256

v3.3.0.0

v3.3.0.0 Release Notes

v3.3.0.0 is released for ESP32-C2 and ESP32-C3. The changes since the previous version are as follows.

ESP32C2-AT
ESP32C3-AT

ESP32C2-AT

Documentation for Release v3.3.0.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v3.3.0.0/esp32c2/index.html ESP32C2-AT v3.3.0.0 is a major update for ESP32C2-AT v3.1.0.0.

The firmwares:

This is the list of changes since release v3.1.0.0:

Breaking Changes

esp-idf version updated to v5.0.6

1. Feature

1.1 TCP/IP

Added the AT+CIPSSLCPSKHEX command to set SSL client pre-shared key in hexadecimal format
Added the AT+CIPRECVTYPE command to set recv mode for each connection
AT+CIPRECVLEN query command can return the real data length now

1.2 Application Layer

AT+CIPSNTPCFG: Added timezone query and timezone set when SNTP was disabled
AT+MQTTCONNCFG: Enlarged lwt msg length to 128 bytes
Added the AT+MQTTSNI command to set MQTT server name indication

2. Bugfix

2.1 Wi-Fi

AT+CWLAP: Fixed an issue where executing AT+CWLAP may return an ERROR when the AT+CWRECONNCFG command is sent immediately after the Wi-Fi disconnection

2.2 TCP/IP

AT+PING: Fixed an issue that cannot ping a linklocal ipv6 address
Fixed an SSL issue where "CLOSED" was output before reading all data in passive mode
Fixed a potential SSL crash if mbedtls dynamic buffer feature is used and SSL renegotiation occurs
Fixed an issue where esp-tls is unable to parse ECC keys

2.3 System

Fixed the issue that AT+SYSMFG read operation returned wrong length
Fixed the issue where AT cannot work immediately after restart and prompt ready
Fixed an AT+SYSFLASH crash issue if read a large amount of data

3. Optimization

Optimized sntp startup delay and receive timeout to speedup sntp time acquisition
Disabled relinker feature to get rid of potential crashes
Optimized the available ram size
Re-organized the gitlab ci
Re-organized the main directory of the esp-at repository
Added some debug options to allow different kinds of esp-at debug output

ESP32C3-AT

Documentation for Release v3.3.0.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v3.3.0.0/esp32c3/index.html ESP32C3-AT v3.3.0.0 is a major update for ESP32C3-AT v3.2.0.0.

The firmware:

ESP32-C3-MINI-1-AT-V3.3.0.0.zip

This is the list of changes since release v3.2.0.0:

Breaking Changes

esp-idf version updated to v5.0.6
RF power: Fixed an issue where the actual wifi transmit power didn't match the settings. The default configuration of wifi transmit power is 19.5 dBm, but the actual wifi transmit power may be slightly lower than the settings, this is because the wifi transmit power is limited by your country code according to phy_multiple_init_data.bin configuration. In the current version, esp-at disabled multiple phy init data bin to improve the wifi transmit power (RF power is no longer limited by your country code).

1. Feature

1.1 TCP/IP

Added the AT+CIPRECVTYPE command to set recv mode for each connection
AT+CIPRECVLEN query command can return the real data length now

1.2 Application Layer

AT+MQTTCONNCFG: Enlarged lwt msg length to 128 bytes
Added the AT+MQTTSNI command to set MQTT server name indication

2. Bugfix

2.1 Wi-Fi

AT+CWLAP: Fixed an issue where executing AT+CWLAP may return an ERROR when the AT+CWRECONNCFG command is sent immediately after the Wi-Fi disconnection
Fixed an issue where init and deinit the wifi could lead to Wi-Fi scan issue

2.2 TCP/IP

AT+PING: Fixed an issue that cannot ping a link-local ipv6 address
Fixed an SSL issue where "CLOSED" was output before reading all data in passive mode
Fixed a potential SSL crash if mbedtls dynamic buffer feature is used and SSL renegotiation occurs
Fixed an issue where esp-tls is unable to parse ECC keys

2.3 System

Fixed the issue where AT cannot work immediately after restart and prompt ready
Fixed an AT+SYSFLASH crash issue if a large amount of data is read

2.4 Bluetooth

Fixed ble init fail issue
Fixed ble disconnection will crash issue
Fixed ble connection timeout issue

3. Optimization

Optimized SNTP startup delay and receive timeout to speed up SNTP time acquisition
Re-organized the GitLab CI
Re-organized the main directory of the esp-at repository
Added some debug options to allow different kinds of esp-at debug output

Assets 2

03 Jan 02:26

xcguang

v4.0.0.0

89040be

v4.0.0.0

ESP32-C6 AT Release v4.0.0.0

Documentation for Release v4.0.0.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v4.0.0.0/esp32c6/index.html

ESP32-C6 AT v4.0.0.0 is the first released version of AT firmware for ESP32-C6.

The firmware:

ESP32-C6-4MB-V4.0.0.0.zip

Known Issues

Unable to use Long Range mode in the AT+CWSTAPROTO and AT+CWAPPROTO commands.
Deinit BluFi will result in a memory leak.
The third BLE connection cannot be paired.
In some scenarios, there may be no prompt to write the attribute value of UUID 0x2902.

Features

Basic AT Commands

AT: Test AT startup.
AT+RST: Restart a module.
AT+GMR: Check version information.
AT+CMD: List all AT commands and types supported in current firmware.
AT+GSLP: Enter Deep-sleep mode.
ATE: Configure AT commands echoing.
AT+RESTORE: Restore factory default settings of the module.
AT+SAVETRANSLINK: Set whether to enter Passthrough Mode on power-up.
AT+TRANSINTVL: Set the data transmission interval in the Passthrough Mode.
AT+UART_CUR: Current UART configuration, not saved in flash.
AT+UART_DEF: Default UART configuration, saved in flash.
AT+SLEEP: Set the sleep mode.
AT+SYSRAM: Query current remaining heap size and minimum heap size.
AT+SYSMSG: Query/Set System Prompt Information.
AT+SYSMSGFILTER: Enable or disable the system message filter.
AT+SYSMSGFILTERCFG: Query/Set the system message filters.
AT+SYSFLASH: Query/Set User Partitions in Flash.
AT+SYSMFG: Query/Set manufacturing nvs User Partitions.
AT+RFPOWER: Query/Set RF TX Power.
AT+SYSROLLBACK: Roll back to the previous firmware.
AT+SYSTIMESTAMP: Query/Set local time stamp.
AT+SYSLOG: Enable or disable the AT error code prompt.
AT+SLEEPWKCFG: Query/Set the light-sleep wakeup source and awake GPIO.
AT+SYSSTORE: Query/Set parameter store mode.
AT+SYSREG: Read/write the register.

Wi-Fi AT Commands

AT+CWINIT: Initialize/Deinitialize Wi-Fi driver.
AT+CWMODE: Set the Wi-Fi mode (Station/SoftAP/Station+SoftAP).
AT+CWSTATE: Query the Wi-Fi state and Wi-Fi information.
AT+CWJAP: Connect to an AP.
AT+CWRECONNCFG: Query/Set the Wi-Fi reconnecting configuration.
AT+CWLAPOPT: Set the configuration for the command AT+CWLAP.
AT+CWLAP: List available APs.
AT+CWQAP: Disconnect from an AP.
AT+CWSAP: Query/Set the configuration of an ESP32-C6 SoftAP.
AT+CWLIF: Obtain IP address of the station that connects to an ESP32-C6 SoftAP.
AT+CWQIF: Disconnect stations from an ESP32-C6 SoftAP.
AT+CWDHCP: Enable/disable DHCP.
AT+CWDHCPS: Query/Set the IPv4 addresses allocated by an ESP32-C6 SoftAP DHCP server.
AT+CWAUTOCONN: Connect to an AP automatically when powered on.
AT+CWAPPROTO: Query/Set the 802.11 b/g/n protocol standard of SoftAP mode.
AT+CWSTAPROTO: Query/Set the 802.11 b/g/n protocol standard of station mode.
AT+CIPSTAMAC: Query/Set the MAC address of an ESP32-C6 station.
AT+CIPAPMAC: Query/Set the MAC address of an ESP32-C6 SoftAP.
AT+CIPSTA: Query/Set the IP address of an ESP32-C6 station.
AT+CIPAP: Query/Set the IP address of an ESP32-C6 SoftAP.
AT+CWSTARTSMART: Start SmartConfig.
AT+CWSTOPSMART: Stop SmartConfig.
AT+WPS: Enable the WPS function.
AT+MDNS: Configure the mDNS function.
AT+CWJEAP: Connect to a WPA2 Enterprise AP.
AT+CWHOSTNAME: Query/Set the host name of an ESP32-C6 station.
AT+CWCOUNTRY: Query/Set the Wi-Fi Country Code.

TCP/IP AT Commands

AT+CIPV6: Enable/disable the network of Internet Protocol Version 6 (IPv6).
AT+CIPSTATE: Obtain the TCP/UDP/SSL connection information.
AT+CIPSTATUS (deprecated): Obtain the TCP/UDP/SSL connection status and information.
AT+CIPDOMAIN: Resolve a Domain Name.
AT+CIPSTART: Establish TCP connection, UDP transmission, or SSL connection.
AT+CIPSTARTEX: Establish TCP connection, UDP transmission, or SSL connection with an automatically assigned ID.
[Data Mode Only] +++: Exit from the data mode.
AT+SAVETRANSLINK: Set whether to enter Wi-Fi Passthrough Mode on power-up.
AT+CIPSEND: Send data in the normal transmission mode or Wi-Fi normal transmission mode.
AT+CIPSENDL: Send long data in parallel in the normal transmission mode.
AT+CIPSENDLCFG: Set the configuration for the command AT+CIPSENDL.
AT+CIPSENDEX: Send data in the normal transmission mode in expanded ways.
AT+CIPCLOSE: Close TCP/UDP/SSL connection.
AT+CIFSR: Obtain the local IP address and MAC address.
AT+CIPMUX: Enable/disable the multiple connections mode.
AT+CIPSERVER: Delete/create a TCP/SSL server.
AT+CIPSERVERMAXCONN: Query/Set the maximum connections allowed by a server.
AT+CIPMODE: Query/Set the transmission mode.
AT+CIPSTO: Query/Set the local TCP Server Timeout.
AT+CIPSNTPCFG: Query/Set the time zone and SNTP server.
AT+CIPSNTPTIME: Query the SNTP time.
AT+CIPSNTPINTV: Query/Set the SNTP time synchronization interval.
AT+CIPFWVER: Query the existing AT firmware version on the server.
AT+CIUPDATE: Upgrade the firmware through Wi-Fi.
AT+CIPDINFO: Set “+IPD” message mode.
AT+CIPSSLCCONF: Query/Set SSL clients.
AT+CIPSSLCCN: Query/Set the Common Name of the SSL client.
AT+CIPSSLCSNI: Query/Set SSL client Server Name Indication (SNI).
AT+CIPSSLCALPN: Query/Set SSL client Application Layer Protocol Negotiation (ALPN).
AT+CIPSSLCPSK: Query/Set SSL client Pre-shared Key (PSK) in string format.
AT+CIPSSLCPSKHEX: Query/Set SSL client Pre-shared Key (PSK) in hexadecimal format.
AT+CIPRECONNINTV: Query/Set the TCP/UDP/SSL reconnection interval for the Wi-Fi normal transmission mode.
AT+CIPRECVTYPE: Query/Set socket receiving mode.
AT+CIPRECVDATA: Obtain socket data in passive receiving mode.
AT+CIPRECVLEN: Obtain socket data length in passive receiving mode.
AT+PING: Ping the remote host.
AT+CIPDNS: Query/Set DNS server information.
AT+CIPTCPOPT: Query/Set the socket options.

Bluetooth® Low Energy AT Commands

AT+BLEINIT: Bluetooth LE initialization.
AT+BLEADDR: Query/Set Bluetooth LE device address.
AT+BLENAME: Query/Set Bluetooth LE device name.
AT+BLESCANPARAM: Query/Set parameters of Bluetooth LE scanning.
AT+BLESCAN: Enable Bluetooth LE scanning.
AT+BLESCANRSPDATA: Set Bluetooth LE scan response.
AT+BLEADVPARAM: Query/Set parameters of Bluetooth LE advertising.
AT+BLEADVDATA: Set Bluetooth LE advertising dATa.
AT+BLEADVDATAEX: AutomATically set Bluetooth LE advertising dATa.
AT+BLEADVSTART: Start Bluetooth LE advertising.
AT+BLEADVSTOP: Stop Bluetooth LE advertising.
AT+BLECONN: Establish Bluetooth LE connection.
AT+BLECONNPARAM: Query/UpdATe parameters of Bluetooth LE connection.
AT+BLEDISCONN: End Bluetooth LE connection.
AT+BLEDATALEN: Set Bluetooth LE dATa packet length.
AT+BLECFGMTU: Set Bluetooth LE MTU length.
AT+BLEGATTSSRV: GATTS discovers services.
AT+BLEGATTSCHAR: GATTS discovers characteristics.
AT+BLEGATTSNTFY: Notify a client of the value of a characteristic value from the server.
AT+BLEGATTSIND: IndicATe the characteristic value from the server to a client.
AT+BLEGATTSSETATTR: GATTS sets characteristics.
AT+BLEGATTCPRIMSRV: Generic ATtributes Client (GATTC) discovers primary services.
AT+BLEGATTCINCLSRV: GATTC discovers included services.
AT+BLEGATTCCHAR: GATTC discovers characteristics.
AT+BLEGATTCRD: GATTC reads characteristics.
AT+BLEGATTCWR: GATTC writes characteristics.
AT+BLESPPCFG: Query/Set Bluetooth LE SPP parameters.
AT+BLESPP: Enter Bluetooth LE SPP mode.
AT+SAVETRANSLINK: Set whether to enter Bluetooth LE :term:Passthrough Mode on power-up.
AT+BLESECPARAM: Query/Set Bluetooth LE encryption parameters.
AT+BLEENC: InitiATe Bluetooth LE encryption request.
AT+BLEENCRSP: Respond to the pairing request from the peer device.
AT+BLEKEYREPLY: Reply the key value to the peer device.
AT+BLECONFREPLY: Reply the confirm value to the peer device in the legacy connection stage.
AT+BLEENCDEV: Query bonded Bluetooth LE encryption device list.
AT+BLEENCCLEAR: Clear Bluetooth LE encryption device list.
AT+BLESETKEY: Set Bluetooth LE stATic pair key.
AT+BLEPERIODICDATA: Set Bluetooth LE periodic advertising dATa.
AT+BLEPERIODICSTART: Start Bluetooth LE periodic advertising.
AT+BLEPERIODICSTOP: Stop Bluetooth LE periodic advertising.
AT+BLESYNCSTART: Start to synchronize with periodic advertising.
AT+BLESYNCSTOP: Stop synchronizing with periodic advertising.
AT+BLEREADPHY: Query the current transmitter PHY.
AT+BLESETPHY: Set the current transmitter PHY.

MQTT AT Commands

AT+MQTTUSERCFG: Set MQTT user configuration.
AT+MQTTLONGCLIENTID: Set MQTT client ID.
AT+MQTTLONGUSERNAME: Set MQTT username.
AT+MQTTLONGPASSWORD: Set MQTT password.
AT+MQTTCONNCFG: Set configuration of MQTT connection.
AT+MQTTALPN: Set MQTT Application Layer Protocol Negotiation (ALPN).
AT+MQTTSNI: Set MQTT Server Name Indication (SNI).
AT+MQTTCONN: Connect to MQTT Brokers.
AT+MQTTPUB: Publish MQTT Messages in string.
AT+MQTTPUBRAW: Publish long MQTT messages.
AT+MQTTSUB: Subscribe to MQTT topics.
AT+MQTTUNSUB: Unsubscribe from MQTT topics.
AT+MQTTCLEAN: Close MQTT connections.

HTTP AT Commands

AT+HTTPCLIENT: Send HTTP Client Request.
AT+HTTPGETSIZE: Get HTTP Resource Size.
AT+HTTPCGET: Get HTTP Resource.
AT+HTTPCPOST: Post HTTP data of specified length.
AT+HTTPCPUT: Put HTTP data of specified length.
AT+HTTPURLCFG: Set/Get long HTTP URL.
AT+HTTPCHEAD: Set/Query HTTP request headers.

User AT Commands

AT+USERRAM: Operate user’s...

Assets 2

Releases: espressif/esp-at

v5.0.0.0

v5.0.0.0 Release Notes

ESP32C5-AT

Known Issues

Features

Basic AT Commands

Wi-Fi AT Commands

TCP/IP AT Commands

Bluetooth® Low Energy AT Commands

MQTT AT Commands

Uh oh!

v2.3.0.0_esp8266

ESP8266-AT Release v2.3.0.0

Breaking Changes

Feature

Bugfix

Uh oh!

v4.1.1.0

v4.1.1.0 Release Notes

ESP32C2-AT

Known Issues

Bugfix

ESP32C3-AT

Known Issues

Bugfix

ESP32C6-AT

Known Issues

Bugfix

ESP32-AT

Known Issues

Bugfix

ESP32S2-AT

Known Issues

Changelog

Basic

Wi-Fi

TCP/IP

mDNS

HTTP

MQTT

FatFS

OTA

WebServer

Uh oh!

v4.1.0.0

v4.1.0.0 Release Notes

ESP32C2-AT

Known Issues

Changelog

Basic

Wi-Fi

TCP/IP

mDNS

HTTP

MQTT

FatFS

OTA

WebServer

WebSocket

Bluetooth

Interface

System

Optimization

Examples

Documentation

ESP32C3-AT

Known Issues

Changelog

Basic

Uh oh!

v2.2.2.0_esp8266

ESP8266 AT Release v2.2.2.0

Breaking Changes Since Release v2.2.1.0

1. Feature

2. Bugfix

2.1 Wi-Fi

2.2 TCP/IP

2.3 Application

2.4 System