ESP8266/OTA

Exploring Over The Air (OTA) updates.

• https://harizanov.com/2015/06/firmware-over-the-air-fota-for-esp8266-soc/

There is an OTA option in the Arduino IDE, however there doesn't seem to be much on how to use it.

• https://github.com/esp8266/Arduino/tree/master/libraries/ArduinoOTA

It's also important to know the flash memory size, ESP.getFlashChipSize() may be useful.

void setup() {
  Serial.begin(115200);
  Serial.println("Flash Memory Stuff");

  Serial.println("ESP ID: ");
  Serial.println(ESP.getChipId(), HEX);
 
  Serial.println("Flash ID: ");
  Serial.println(ESP.getFlashChipId(), HEX);
  Serial.println("Flash Size: ");
  Serial.println(ESP.getFlashChipSize());
  Serial.println("Flash Speed: ");
  Serial.println(ESP.getFlashChipSpeed());
}

Serial output from an ESP-01

ESP ID: 
DCED75
Flash ID: 
1440E0
Flash Size: 
4194304
Flash Speed: 
40000000

Note: Updated to HEX formatting of numbers. Flash Size returned seems to be whatever option you have set in the IDE, and may not reference the actual hardware size.