How to Use LILYGO T-SIM7080G S3: Examples, Pinouts, and Specs

The LILYGO T-SIM7080G S3 is a compact and versatile development board designed for IoT applications. It features the SIM7080G module, which supports LTE Cat-M, NB-IoT, GPS, and GSM communication. This board is ideal for projects requiring wireless connectivity, low-power operation, and location tracking. With its ESP32-S3 microcontroller, the T-SIM7080G S3 offers robust processing power and seamless integration with various sensors and peripherals.

• IoT devices for smart homes and industries
• GPS-based location tracking systems
• Remote monitoring and control systems
• Environmental data collection and reporting
• Low-power, wide-area network (LPWAN) applications

1. Powering the Board: Connect the T-SIM7080G S3 to a 5V power source via the USB-C port. Ensure the power supply is stable to avoid damage.
2. Connecting Antennas: Attach the LTE and GPS antennas to their respective connectors for optimal signal reception.
3. Programming the ESP32-S3: Use the Arduino IDE or ESP-IDF to program the ESP32-S3. Install the necessary board definitions and libraries for the ESP32-S3 and SIM7080G.
4. Interfacing with Peripherals: Use the GPIO, I2C, or SPI pins to connect sensors, actuators, or other peripherals.
5. Establishing Cellular Connectivity: Insert a compatible SIM card into the SIM7080G slot. Configure the APN settings in your code to enable LTE or NB-IoT communication.

• Ensure the SIM card supports LTE Cat-M or NB-IoT for optimal performance.
• Use proper decoupling capacitors to minimize noise and ensure stable operation.
• Avoid placing the board near high-frequency noise sources to maintain GPS accuracy.
• When using GPS, ensure the antenna has a clear view of the sky for better signal reception.
• Monitor power consumption in low-power applications and utilize the ultra-low power modes of the ESP32-S3 and SIM7080G.

Below is an example of how to send an HTTP GET request using the SIM7080G module:

#include <SoftwareSerial.h>

// Define RX and TX pins for communication with SIM7080G
SoftwareSerial sim7080(10, 11); // RX = 10, TX = 11

void setup() {
  Serial.begin(115200); // Initialize Serial Monitor
  sim7080.begin(9600);  // Initialize SIM7080G communication

  // Send AT command to check module response
  sim7080.println("AT");
  delay(1000);
  while (sim7080.available()) {
    Serial.write(sim7080.read()); // Print response to Serial Monitor
  }

  // Configure APN for your network provider
  sim7080.println("AT+CGDCONT=1,\"IP\",\"your_apn_here\"");
  delay(1000);
  while (sim7080.available()) {
    Serial.write(sim7080.read());
  }

  // Connect to the network
  sim7080.println("AT+CGATT=1");
  delay(1000);
  while (sim7080.available()) {
    Serial.write(sim7080.read());
  }

  // Send HTTP GET request
  sim7080.println("AT+HTTPINIT");
  delay(1000);
  sim7080.println("AT+HTTPPARA=\"URL\",\"http://example.com\"");
  delay(1000);
  sim7080.println("AT+HTTPACTION=0");
  delay(5000); // Wait for response
  while (sim7080.available()) {
    Serial.write(sim7080.read());
  }
}

void loop() {
  // Keep the loop empty for this example
}

Note: Replace your_apn_here with the APN provided by your SIM card provider. Ensure the RX and TX pins are correctly connected to the SIM7080G module.

1. No Response from SIM7080G:

   • Ensure the module is powered on and the SIM card is properly inserted.
   • Check the RX and TX connections between the microcontroller and the SIM7080G.

2. Unable to Connect to Network:

   • Verify the APN settings in your code.
   • Ensure the SIM card has an active data plan and supports LTE Cat-M or NB-IoT.

3. GPS Not Working:

   • Ensure the GPS antenna is connected and has a clear view of the sky.
   • Wait for a few minutes to allow the module to acquire satellite signals.

4. High Power Consumption:

   • Use the ultra-low power modes of the ESP32-S3 and SIM7080G when the device is idle.
   • Disconnect unused peripherals to reduce power draw.

• Can I use this board with other microcontrollers? Yes, the SIM7080G module can be interfaced with other microcontrollers via UART, I2C, or SPI.

• What is the maximum data rate supported by the SIM7080G? The SIM7080G supports LTE Cat-M and NB-IoT with data rates up to 375 kbps.

• Does the board support 5G networks? No, the SIM7080G module supports LTE Cat-M, NB-IoT, and GSM networks only.

• Can I use this board for battery-powered applications? Yes, the board is designed for low-power operation, making it suitable for battery-powered IoT devices.