A simple library to add support for Over-The-Air (OTA) updates to your project.

• Web update (requires web server)
• Batch firmware sync
• Multi firmware update record
• Stream update (e.g. MQTT or other)

This library tries to access a JSON file hosted on a webserver, and reviews it to decide if a newer firmware has been published, if so it will download it and install it.

There are a few things that need to be in place for an update to work.

• A webserver with the firmware information in a JSON file
• Firmware version
• Firmware type
• Firmware bin

This is hosted by a webserver and contains information about the latest firmware

{
    "type": "esp32-fota-http",
    "version": 2,
    "host": "192.168.0.100",
    "port": 80,
    "bin": "/fota/esp32-fota-http-2.bin"
}

Types are used to compare with the current loaded firmware, this is used to make sure that when loaded, the device will still do the intended job.

As an example, a device used as a data logger should ony be updated with new versions of the data logger.

• TTGO-T8-ESP32-Logger
• TTGO-T8-ESP32-Temp
• TTGO-T8-ESP32-Relay

In this example a version 1 of 'esp32-fota-http' is in use, it would be updated when using the JSON example.

#include <esp32fota.h>
#include <WiFi.h>

const char *ssid = "";
const char *password = "";

esp32FOTA esp32FOTA("esp32-fota-http", 1);

void setup()
{
  esp32FOTA.checkURL = "http://server/fota/fota.json";
  Serial.begin(115200);
  setup_wifi();
}

void setup_wifi()
{
  delay(10);
  Serial.print("Connecting to ");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.print(".");
  }
}

void loop()
{
  bool updatedNeeded = esp32FOTA.execHTTPcheck();
  if (updatedNeeded)
  {
    esp32FOTA.execOTA();
  }
  delay(2000);
}