ESP32-IO_Extender.ino

// IO Extender
// Use of an ESP32, such as ESP32-C3 to provide additional peripheral pins
// to another ESP32 with limited free pins, such as ESP-Cam module
// The ESPs communicate using a UART interface.
// The interface only supports peripherals that receive or output a numeric value.
// It is only suitable for low data rate peripherals, it cannot support clocked 
// data streams such as a microphone.
// This version of the app is configured to support peripherals for ESP32_MJPEG2SD
// Modify peripherals.cpp to add further peripherals
//
// Compile with partition scheme: Minimal Spiffs ...
//
// s60sc 2022

#include "appGlobals.h"

static bool startedUp = false;

void setup() {
  logSetup();
  // prep SD card storage and Load saved user configuration
  if (startStorage()) loadConfig();

#ifdef DEV_ONLY
  devSetup();
#endif

  // connect wifi or start config AP if router details not available
  startWifi(); 
  
  startWebServer();
  if (strlen(startupFailure)) LOG_ERR("%s", startupFailure);
  else {
    // start rest of services
    prepPeripherals();
    startedUp = true;
    checkMemory();
    LOG_INF("=============== Total tasks: %u ===============\n", uxTaskGetNumberOfTasks());
  }
}

void loop() {
  if (startedUp) getPeripheralsRequest();
}