You can perform remote firmware updates using ESP8266.

Hardware Setup

Add Includes to Skecth

#include <ESP8266WiFi.h> 
#include <ArduinoOTA.h>  // Enable Remote Updates

The password is same API_KEY

#define ODEV_API_KEY "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX"

The first upload must be done by the Serial, the others can be done by the network.

Upload ( Using IDE )

On serial console you can see the IP:

Only if module is connected to network, after a couple of seconds, the esp8266-ota port will show up in Arduino IDE.

On linux, you can scan

avahi-browse -rt _arduino._tcp

If it does not appear in the list, restart the IDE.

selection of OTA port

If it still does not appear, you can use the option: Upload ( Manual PUSH )

Upload ( Command Line )

This option uses the command line (terminal) to upload.

Goto esp8266 tools folder (Ex.: /home/user/.arduino15/packages/esp8266/hardware/esp8266/2.X.X/tools)

Run command (change IP, APY_KET and FILE)

python espota.py -i IP.IP.IP.IP -a "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX" -f /tmp/pathTo/Sketch.ino.bin

To find path to firmware you must enable verbose output in Arduino preferences:

Much information will appear, look for the file ending with ".ino.bin" on console

Upload ( Using Middleware )

PENDING