Skip to content

Latest commit

 

History

History
302 lines (247 loc) · 22 KB

REAMDE.MD

File metadata and controls

302 lines (247 loc) · 22 KB
LilyGo logo

🌟LilyGo T-A7670X-S3-Standard🌟

Overview

  • This page introduces the hardware parameters related to LilyGo T-A7670X-S3-Standard

Product

Product SOC Flash PSRAM
T-A7670X-S3-Standard ESP32-S3-WROOM-1 16MB(Quad-SPI) 2MB(Quad-SPI)

Modem differences

Model GPS Phone Call SMS Frequency band
A7670E-FASE ✅ ✅ ✅ LTE-FDD:B1/B3/B5/B7/B8/B20 GSM:900/1800
A7670SA-FASE ✅ ✅ ✅ LTE-FDD:B1/B2/B3/B4/B5/B7/B8/B28/B66 GSM:850/900/1800/1900
A7670E-LNXY-UBL ❌ ❌ ❌ LTE-FDD:B1/B3/B5/B7/B8/B20
A7670SA-LASE ❌ ✅ ✅ LTE-FDD:B1/B2/B3/B4/B5/B7/B8/B28/B66 GSM:850/900/1800/1900
A7670SA-LASC ❌ ✅ ✅ LTE-FDD:B1/B2/B3/B4/B5/B7/B8/B28/B66 GSM:850/900/1800/1900
A7670G-LLSE ❌ ✅ ✅ LTE-FDD:B1/B2/B3/B4/B5/B7/B8/B20/B28/B66 LTE-TDD:B34/B38/B39/B40/B41 GSM:850/900/1800/1900
A7670G-LABE ❌ ✅ ✅ LTE-FDD:B1/B2/B3/B4/B5/B7/B8/B12/B13/B18/B19/B20/B25/B26/B28/B66 LTE-TDD:B34/B38/B39/B40/B41 GSM:850/900/1800/1900
A7670E-LASE ❌ ✅ ✅ LTE-FDD:B1/B3/B5/B7/B8/B20 GSM:900/1800

Important

How to check the specific model version of the modem? Sending AT+SIMCOMATI can return the firmware version and hardware version used.

Please note that whether the GNSS IPEX antenna connector is on the PCB or not depends on the actual modem version. The A7670G modem does not have internal GPS functionality, regardless of whether GPS is included in your order. If you purchased the A7670G with GPS, you will need to use an external GPS module. A7670G+GPS orders use an external GPS module and can only use ExternalGPS_A7670G_Only Example. Other GPS examples cannot be used.

PlatformIO Quick Start

  1. Install Visual Studio Code and Python
  2. Search for the PlatformIO plugin in the Visual Studio Code extension and install it.
  3. After the installation is complete, you need to restart Visual Studio Code
  4. After restarting Visual Studio Code, select File in the upper left corner of Visual Studio Code -> Open Folder -> select the LilyGo-Modem-Series directory
  5. Wait for the installation of third-party dependent libraries to complete
  6. Click on the platformio.ini file, and in the platformio column
  7. Cancel the ; symbol in front of the line default_envs = T-A7670X-S3-Standard and use T-A7670X-S3-Standard as the default environment
  8. Uncomment one of the lines src_dir = xxxx to ensure that only one line is valid. For example, to enable src_dir = examples/ATdebug, remove the leading ; symbol and save the file. The ATDebug example will now be compiled.
  9. Click the (✔) symbol in the lower left corner to compile
  10. Connect the board to the computer ESP-USB , Modem-USB is used for module firmware upgrade
  11. Click (→) to upload firmware
  12. Click (plug symbol) to monitor serial output
  13. If it cannot be written, or the USB device keeps flashing, please check the FAQ below

Arduino IDE quick start

  1. Install Arduino IDE

  2. Install Arduino ESP32

  3. Copy all folders in the lib directory to the Sketchbook location directory. How to find the location of your own libraries, please see here

    • Windows: C:\Users\{username}\Documents\Arduino
    • macOS: /Users/{username}/Documents/Arduino
    • Linux: /home/{username}/Arduino

  4. Open the corresponding example

    • Open the downloaded LilyGo-Modem-Series
    • Open examples
    • Select the sample file and open the file ending with ino

  5. On Arduino ISelect the corresponding board in the DE tool project and click on the corresponding option in the list below to select

    Name Value
    Board ESP32S3 Dev Module
    Port Your port
    USB CDC On Boot Enable
    CPU Frequency 240MHZ(WiFi)
    Core Debug Level None
    USB DFU On Boot Disable
    Erase All Flash Before Sketch Upload Disable
    Flash Mode QIO 80Mhz
    Flash Size 16MB(128Mb)
    Arduino Runs On Core1
    USB Firmware MSC On Boot Disable
    Partition Scheme 16M Flash (3MB APP/9.9MB FATFS)
    PSRAM QSPI PSRAM
    Upload Speed 921600
    Programmer Esptool
    • Partition Scheme Please select according to the actual application. For example, select 16M Flash (3MB APP/9.9MB FATFS) , For more partitioning schemes, please see here

  6. In the open sketch, select the utilities.h file and uncomment the line // #define LILYGO_A7670X_S3_STAN. Delete the // and save the file to use this board as the default configuration.

    board_select

  7. Upload sketch

Important

  1. Unable to upload any code? Please see the FAQ below
  2. When opening the Arduino IDE, you will be prompted that there are new libraries that can be updated. Please do not click update. There is no guarantee that it can be compiled, run, etc. after the update. Make sure that the board is running normally before deciding whether to update. You have to Know that problems may occur after updating due to library differences, or the default configuration (such as TinyGSM) will be overwritten.
  3. If it runs abnormally after the update, please follow Article 3 of the Arduino Quick Start to delete the directory in libraries, and drag the folder in lib into the libraries directory again.

📍 Pins Map

Name GPIO NUM Free
Modem TX 4 ❌
Modem RX 5 ❌
Modem RING 6 ❌
Modem DTR 7 ❌
Modem PWRKEY 46 ❌
GPS RX 48 ❌
GPS TX 45 ❌
Modem RTS* 48 ❌
Modem CTS* 45 ❌
GPS PPS 17 ❌
GPS Shield Wakeup 0 ❌
Battery ADC Pin 8 ❌
Solar ADC Pin 18 ❌
SD SCK 12 ❌
SD MISO 13 ❌
SD MOSI 11 ❌
SD CS 10 ❌
Power Save Mode 42 ❌
Camera XCLK 21 ❌
Camera SIOD 1 ❌
Camera SIOC 41 ❌
Camera VSYNC 9 ❌
Camera HREF 14 ❌
Camera PCLK 37 ❌
Camera Y9 40 ❌
Camera Y8 39 ❌
Camera Y7 38 ❌
Camera Y6 36 ❌
Camera Y5 16 ❌
Camera Y4 47 ❌
Camera Y3 15 ❌
Camera Y2 35 ❌
Camera RESET See the tips below ❌
Camera PWD See the tips below ❌
Default SDA 3 ✅️
Default SCL 2 ✅️

Modem Pins

Name GPIO NUM Enable level AT Command
GPS Ant Power Enable 1 High AT+CGDRT=1,1 ; AT+CGSETV=1,1
Audio power amplifier Enable 3 High AT+CGDRT=3,1 ; AT+CGSETV=3,1
  • The Power Save Mode pin is used to set the power capability of the power supply. Setting it to HIGH enables maximum power output. Setting it to LOW reduces current consumption.
  • If a camera is connected externally, there will be no free GPIO. If the camera is not used, the camera's GPIO can be used for other purposes.
  • SDA, SCL can only be used as I2C function, not as other functions
  • GPS Shield Wakeup Pin is only used when an external GPS module is connected. Otherwise, it is idle. It is not recommended to use this GPIO. This IO is connected only when using A7670G + L76K GPS, otherwise it is not connected
  • The camera must be powered on to be detected, otherwise the camera cannot be used. For how to turn it on, please refer to the Camera example.
  • Modem RTS/Modem CTS are not connected by default. They are connected to the GPS RX/TX of the Modem by default. If you need to use them, you need to short-circuit the RTS/CTS short-circuit pads on the back of the PCB, and then separate the GPS TX and RX pads.
  • Camera RESET : To maximize GPIO usage, no GPIO is assigned to the camera reset pin, so a power cycle is used to reset the camera. The power-on sequence is: power on all cameras -> power off all cameras -> delay 300 milliseconds -> power on all cameras -> delay 100 milliseconds.
  • Camera PWD : In order to maximize the use of GPIO, all GPIOs are not assigned to the camera PWD Pin. When the camera is not in use, you only need to turn off the camera power to completely turn off the power supply of the camera.
  • Camera Pins : if the camera is not used, then all the pins assigned to the camera by default can be freely allocated and used without restrictions
  • GPS Ant Power Enable : When using GPS, you must set the modem's GPIO1 to high level by sending AT+CGDRT=1,1; AT+CGSETV=1,1. When not using GPS, you can send AT+CGDRT=1,1; AT+CGSETV=1,0 to turn off the GPS antenna power supply and save power.
  • Audio power amplifier Enable: When using audio playback or making calls, you must send AT+CGDRT=3,1; AT+CGSETV=3,1 to set the modem's GPIO1 to a high level. When not in use, you can send AT+CGDRT=3,1; AT+CGSETV=3,0 to turn off the power amplifier and save power.

⚡ Electrical parameters

Features Details
🔗USB-C input voltage range 4.5V~5.5V
🔗VBUS Pin input voltage range 4.5V~5.5V
⚡Solar Input Voltage 5 ~ 6V
⚡USB-C/Solar Charge Max Current 500mA
🔋Battery Voltage 3.7V
🔋Battery socket voltage range 3.4~4.3V
📍VBUS ( Pin header) 5V
📍VBAT ( Pin header) 4.2V
  • The minimum voltage of battery power supply depends on the discharge capacity of the battery. The minimum power supply voltage test using a voltage regulator can be as low as 2.7V (due to the low voltage stability of the voltage regulator)
  • The VBUS pin is on the same line as the USB-C port. When connected to USB-C, the VBUS pin will also have voltage. The VBUS pin can only be used for external power input and will not provide power to the outside.

Tip

  1. The onboard JST2.0 interface is only used to connect the solar panel to charge the battery, and cannot provide power to the board from this interface
  2. It is recommended to use a solar panel with an output voltage of 6V or 5V and a power of about 5-10W. Solar energy can only charge the battery. Without the battery, the panel cannot supply power. Please note that this is only a suggestion. It is not necessary to use a 5-10W solar panel. 1W is also acceptable. The size of the solar panel determines the current and speed of solar charging. Please note that depending on the environment, the sunshine time may not exceed one hour per day. At this time, if the solar panel is too small and the light is not sufficient, it cannot be charged.
  3. Connect the VBUS pin to the USB-C power supply. If USB-C is present, the VBUS voltage is equal to the USB-C voltage. If USB-C is not present, there is no voltage on VBUS.
  4. Connect the VBAT pin to the positive terminal of the battery. This pin can be used to connect an external battery directly to the VBAT pin. When using an external battery, it is best not to connect the battery to the development board's 18650 battery holder unless the battery's parameters are similar to the external battery. Batteries connected to the VBAT pin can be charged using the onboard charge management.

⚡Battery Protector Description

Features Details
Over-Voltage Threshold 4.30V
Under-Voltage Threshold 2.4V
Over-Charge Current 3.6A
Over-Discharge Current 4.6A
Short-Circuit Current 2 × 4.6A

Important

Please note that the development board will not power on when connected to an 18650 battery. To activate battery power, you can use the following method to activate the BMS.

Method: Plug into the USB-C port labeled ESP-USB. Please note that the Modem-USB port will not power or charge the development board.

Please note that even if the power switch is off, you still need to activate the BMS as described above to power the development board. If you briefly turn the power switch off, turning it back on will also reconnect the battery power, eliminating the need to reconnect the USB port to activate the BMS.

Connector Description

Button Function Location
JST 1.0mm SPEK Connect speakers PCB Bottom
JST 1.0mm MIC Connect condenser microphone PCB Bottom
JST 1.0mm RTC Connect 3~3.3V button battery PCB Bottom
JST 2.0mm Solar Connect to a 5~6V solar panel PCB Top
24 Pin 0.5mm FPC Connector Connect OV2640/OV5640 camera PCB Top
QWIIC I2C Interface PCB Bottom
QWUART or QWIIC UART or I2C Interface PCB Bottom
  • Camera models support cameras supported by esp32 platform
  • QWIIC I2C : Fixed to I2C interface, cannot be changed to other functions , Examples see QWIIC_I2C_Scan.ino
  • QWIIC UART : The default is ESP serial output, which can also be changed to the second I2C interface, I2C Example see QWIIC_I2C_Scan.ino / , Uart example see QWIIC_UART_loopback.ino
  • JST 2.0mm Solar : This is the solar panel voltage input interface. This interface is only used as a solar or external power charging interface. It cannot be used to provide power to the motherboard after removing the battery.
  • JST 1.0mm SPEK: This is the external speaker interface, the maximum output power of this interface is 8 ohms 1W
  • JST 1.0mm MIC: This is an external condenser microphone interface for calls. The condenser microphone is directly connected to the modem. Only condenser microphones can be used, not digital microphones.
  • JST 1.0mm RTC: This is the GPS backup power battery interface. If you do not connect this battery, the GPS will not have the hot start function. Connecting a battery to this interface will enable the GPS hot start function.

Button Description

Button Function Location
BOOT (ESP32S3 back) Customizable function/Download mode PCB Bottom
RST (ESP32S3 back) Reset devices button PCB Bottom
SBOOT(Near to modem) Modem Upgrade mode PCB Bottom
  • RST and BOOT Located on the bottom of the ESP32 module
  • SBOOT is located on the back near the modem module
  • Press and hold the BOOT button before powering on. The board is now in waiting mode for downloading.
  • Before powering on, keep the SBOOT button pressed to put the modem into firmware update mode.
  • The above naming method is subject to the board silk screen printing

Antenna Description

NAME Function
LTE LTE Main antenna interface
GNSS GPS active antenna interface
  • When using, you only need to connect the LTE antenna you wear to the LTE IPEX first generation interface. The AUX antenna does not need to be connected.
  • The above naming method is subject to the board silk screen printing

LED Description

FUNCTION COLOR STATE
MODEM STATE RED (Near the modem) Startup:ON
MODEM NET RED (Near the modem) Network status indicator
GPS PPS LED RED (Near the modem) Starting:ON,Startup completed:OFF,Position fix:Flashes once per second
CHARGE LED RED (Near the battery switch) Charging:ON Charging complete:OFF
CHARGE DONE LED GREEN (Near the battery switch) Charging:OFF Charging complete:ON
  • CHARGE DONE LED remains on if no battery is connected
  • Modem Status light and network status led cannot be turned off

eSIM

  • The eSIM uses a QFN5*6-8 package and supports 1.8V/3.3V. It's not installed by default and requires soldering.

Resource

FAQ

  • Upgrade modem firmware

    1. T-A76XX Upgrade docs / Video

  • Unable to detect SIMCard?

    1. Need to insert the SIMCard into the board first and then power on to detect the SIM card. If the order is reversed, it will report that the SIMCard cannot be detected.

  • Can't upload any sketch，Please enter the upload mode manually.

    1. Connect the board via the USB cable
    2. Press and hold the BOOT button , While still pressing the BOOT button
    3. Press RST button
    4. Release the RST button
    5. Release the BOOT button
    6. Upload sketch

  • What the onboard switch does

    1. When using the internal battery pack, the switch will work normally to power/power down the board. However, if an external battery pack is used and connected to the VBAT pin, the switch will be bypassed, meaning the only way to shut down is to disconnect the battery.
    2. The switch is only for battery power and has no effect when plugged into USB
    3. To activate battery power, please see the Battery Protector Description above.

  • About VBUS Pin

    1. VBUS Pin and USB-C are on the same line. Only when USB-C is connected, VBUS has voltage
    2. When only the battery is connected, VBUS has no voltage output
    3. If you want to connect an external power supply without connecting USB-C, VBUS Pin is the only voltage input pin. Please note that the maximum input of VBUS Pin is 5V, do not exceed 5V

  • Can other GPS antennas be used?

    1. The external GPS antenna must be an active GPS antenna with a 3.3V power supply. For example, the MK-76 supports 2.5-5.5V and is compatible. Most active GPS antennas support 2.5-5.5V power. Please refer to the GPS antenna datasheet for details.