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LilyGo logo

🌟LilyGo T-Beam-1W🌟

Overview

  • This page introduces the hardware parameters related to LilyGo T-Beam-1W

Notes on use

  1. This board will not charge the external 7.4V battery, it is only powered by the battery.
  2. Please be sure to connect the antenna before transmitting, otherwise it is easy to damage the RF module.
  3. Please note that the GPIO with * added to the external pin header GPIO name is already connected to the internal module and cannot be used
  4. This RF module provides a maximum power output of 32dBm on this board

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-LoRa-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. Select the board name you want to use in default_envs and uncomment it.
  8. Uncomment one of the lines src_dir = xxxx to make sure only one line works , Please note the example comments, indicating what works and what does not.
  9. Click the (✔) symbol in the lower left corner to compile
  10. Connect the board to the computer USB-C , Micro-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-LoRa-Series
    • Open examples
    • Select the sample file and open the file ending with ino

  5. On Arduino Select the corresponding board in the IDE 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 OPI PSRAM
    Upload Speed 921600
    Programmer Esptool

  6. Please uncomment the utilities.h file of each sketch according to your board model e.g T_BEAM_1W_SX1262, otherwise the compilation will report an error.

  7. Upload sketch

📍 Pins Map

Name GPIO NUM Free
Uart1 TX 43(External QWIIC Socket) ✅️
Uart1 RX 44(External QWIIC Socket) ✅️
SDA 8 (External QWIIC Socket same) ❌
SCL 9 (External QWIIC Socket same) ❌
SPI MOSI 11 ❌
SPI MISO 12 ❌
SPI SCK 13 ❌
SD CS 10 ❌
SD MOSI Share with SPI bus ❌
SD MISO Share with SPI bus ❌
SD SCK Share with SPI bus ❌
GNSS(L76K) TX 6 ❌
GNSS(L76K) RX 5 ❌
GNSS(L76K) PPS 7 ❌
GNSS(L76K) Wake-up 16 ❌
LoRa(SX1262) SCK Share with SPI bus ❌
LoRa(SX1262) MISO Share with SPI bus ❌
LoRa(SX1262) MOSI Share with SPI bus ❌
LoRa(SX1262) RESET 3 ❌
LoRa(SX1262) DIO1 1 ❌
LoRa(SX1262) CS 15 ❌
LoRa(SX1262) LDO EN 40 ❌
LoRa(SX1262) Ctrl 21 ❌
LoRa(SX1262) BUSY 38 ❌
Button1 (BOOT) 0 ❌
Button2 17 ❌
On Board LED 18 ❌
NTC ADC 14 ❌
Battery ADC 4 ❌
Fan control 41 ❌

Important

LDO EN pin is control pin inside the module and power supply:

  1. High level turns on the Radio
  2. Low level turns off the Radio

LoRa Ctrl pin is internal LNA power control of the module:

  1. When receiving data, set it to high level and turn on the LNA power;
  2. When transmitting data and sleeping, set it to low level and turn off the LNA power.

🧑🏼‍🔧 I2C Devices Address

Devices 7-Bit Address Share Bus
OLED Display SH1106 0x3C ✅️

⚡ Electrical parameters

Features Details
🔗USB-C Input Voltage 3.9V-6V
⚡Charge Function ❌
🔋Battery Voltage 7.4V

Important

The battery used must have a discharge capacity of 2A or greater; otherwise, it may trigger battery protection during high-power transmission.

Button Description

Channel Peripherals
IO17 Customizable buttons
BOOT Boot mode button, customizable
RST Reset button

LED Description

  • IO18 LED

    1. Connect to GPIO18, you can turn the LED on or off by writing high or low level.

  • PPS LED

    1. This LED cannot be turned off and is connected to the GPS PPS Pin. This LED flashes to indicate that the PPS pulse has arrived.

  • USB LED

    1. LED On means the USB cable is connected,LED off means the USB cable is disconnected

RF parameters

Features 868MHz 433MHz
RF Module SX1262 TCXO (XY16P35) SX1262 TCXO XY16P354
Frequency range 830~950MHz 400~520MHz
Transfer rate(LoRa) 0.018K～37.5Kbps 0.018K～37.5Kbps
Transfer rate(FSK) 1.2K～300Kbps 1.2K～300Kbps
Modulation FSK, GFSK, MSK, GMSK, LoRa,OOK FSK, GFSK, MSK, GMSK, LoRa,OOK
Sub1G PA Gain ~ +12dBm HM06S006P ~ +12dBm HE0008
LNA allows maximum input power +15dBm +15dBm

Frequently asked questions

  1. When testing or using, connect the antenna first, then power on to transmit the signal.
  2. The module uses a high-gain, high-efficiency power amplifier. When the output power of SX1262 is +22dBm (max), the module output power is maximum.
  3. Suggestion: Please give the internal PA stabilization time before transmitting data: For SX1262 chip, the recommended configuration value is >800us

RampTime

  1. When the module is ready to transmit/receive data, you need to switch the RF Switch on the module to the transmit/receive channel in advance. This switch is a single-pole double-throw switch. See the figure below for the truth table
DIO2 PIN CTRL PIN RF Switch Status
1 0 ANT and TX channels connected, PA turned on, LNA powered off
0 1 ANT and RX channels are connected, PA is closed, LNA is opened
  1. During TX DATA, if the switch is not switched to the correct position in advance, the PA chip inside the module is likely to be damaged.

RF Block Diagram

RF Block Diagram

VCC=+5V, 400M~520MHz module output power dBm and current

currnetA

VCC=+5V, 830M~950MHz module output power dBm and current

currnetB

Resource

Max Transmit power

Freq Max Transmit power
868MHz sub1g

Sleep Current

sleep

  • All the above tests were conducted using a battery-powered system with a voltage of 7V