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PPPoS Example using Mongoose OS App

Overview

This app shows how to connect to the internet via a GSM modem using the PPP protocol.

Prereq

GPIO pins that are used for UART interface for ESP32:

  • UART 0

    • RX GPIO: 3
    • TX GPIO: 1

  • UART 1

    • RX GPIO: 25
    • TX GPIO: 26

  • UART 2

    • RX GPIO: 16
    • TX GPIO: 17

The hardware that we are using:

  • ESP32 Dev Board
  • SIM868 Module Board

Hardware Connections

  • UART 1 is used
  • Common GND for ESP32 and SIM868 module
  • GPIO15 of ESP32 is connected to GPIO7 (RPi Board) pin on SIM868 module. Pulling it low for 4 seconds and then pulling it high turns the module on.
  • Dedicated power supply to SIM868 is required otherwise it would keep restarting.

Details

PPP library automatically connects to the GPRS network and obtains an IP address.

Resources