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This project demonstrates how to use the ESP32-S3 microcontroller with the SIM800L GPRS module to send a POST request to a web server.

• Sends a POST request to a web server using the SIM800L GPRS module

• Reads the response from the web server and prints it to the serial monitor

• Uses a button to trigger the request

• Debounces the button input to prevent multiple requests

• ESP32-S3 microcontroller

• SIM800L GPRS module

• Button

• Jumper wires

• Arduino IDE

• ESP32-S3 board package

• SIM800L library

1. Install the ESP32-S3 board package in the Arduino IDE.

2. Download the SIM800L library and install it in the Arduino IDE.

3. Connect the ESP32-S3 to the SIM800L module according to the following pinout:

   • ESP32-S3 RX (GPIO 4) to SIM800L TX

   • ESP32-S3 TX (GPIO 5) to SIM800L RX

   • ESP32-S3 3.3V to SIM800L VCC

   • ESP32-S3 GND to SIM800L GND

4. Connect a button to the ESP32-S3 GPIO 0 pin.

5. Upload the code to the ESP32-S3.

1. Open the serial monitor in the Arduino IDE.

2. Press the button to send a POST request to the web server.

3. The response from the web server will be printed to the serial monitor.

• The web server URL and request parameters can be modified in the code.

• The SIM800L module requires a SIM card with a data plan.

• The code includes a debounce delay to prevent multiple requests from being sent when the button is pressed.

• The code also includes commands to test the IP address and signal quality of the SIM800L module.

• ESP32-S3 Documentation

• SIM800L Documentation

• Arduino SIM800L Library