T3-LoRa32 Quick Start

Required Libraries

Library	Version	Source
RadioLib	Latest	GitHub
U8g2	Latest	Arduino Library Manager

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Arduino

PlatformIO (Recommended)

1. Install VS Code with the PlatformIO IDE extension
2. Clone the repository:

   git clone https://github.com/Xinyuan-LilyGO/LilyGo-LoRa-Series.git

3. Open the project, select the T3_V1.6.1 environment in platformio.ini
4. Click ✓ to build, connect via Micro USB, then click → to upload

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Arduino IDE

Board Settings

Setting	Value
Board	ESP32 Dev Module
Upload Speed	921600
Flash Mode	QIO
Flash Size	4MB (32Mb)
Partition Scheme	Default 4MB with spiffs
PSRAM	Disabled

Steps

1. Install Arduino IDE and add ESP32 board support: https://espressif.github.io/arduino-esp32/package_esp32_index.json
2. Install the CH9102 USB driver if not already present
3. In utilities.h, uncomment the macro matching your board variant (V1.3, V1.6.1, or TCXO)
4. Select the correct board settings and click Upload

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Peripheral Examples

LoRa (SX1276 / SX1278)

#include <RadioLib.h>

// SX1276: CS=18, IRQ=26, RST=23, DIO1=33
SX1276 radio = new Module(18, 26, 23, 33);

void setup() {
  Serial.begin(115200);
  // Use 433.0 for SX1278 variant
  int state = radio.begin(915.0);
  if (state != RADIOLIB_ERR_NONE) {
    Serial.print("Radio init failed: "); Serial.println(state);
    while (true);
  }
  Serial.println("SX1276 ready");
}

void loop() {
  int state = radio.transmit("Hello LoRa32");
  if (state == RADIOLIB_ERR_NONE) Serial.println("Sent OK");
  delay(2000);
}

OLED Display (SSD1306)

#include <U8g2lib.h>
#include <Wire.h>

// SSD1306 128×64 I2C, SDA=21, SCL=22
U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, U8X8_PIN_NONE);

void setup() {
  u8g2.begin();
}

void loop() {
  u8g2.clearBuffer();
  u8g2.setFont(u8g2_font_ncenB08_tr);
  u8g2.drawStr(0, 20, "LoRa32 Ready");
  u8g2.sendBuffer();
  delay(1000);
}

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Notes

• USB: Micro USB with CH9102 USB-to-serial chip — install the CH9102 driver if the port is not detected
• LoRa module: SX1276 (868/915/923 MHz) or SX1278 (433 MHz) depending on the version ordered
• SD card: Remove the TF card before flashing; it shares the SPI bus and can prevent uploads
• GPIO: GPIO33 and above are input-only on the ESP32; do not drive them as outputs

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FAQ

Q: Port not recognized? A: Download and install the CH9102 driver from the manufacturer's website, then reconnect.

Q: LoRa send fails? A: Verify the frequency in your sketch matches the module variant you ordered (433 / 868 / 915 MHz).