“As I was building my SmartHomeDIY platform (OpenSource) one of the first things I was looking for (except of debug tools and board), was a bootloader for Arduino which supports over the air flashing of the internal sketch.
I needed this because I was about to mount all the Arduino board inside my wall, and I did not wanted to take them apart every time I had a bug.
So the way to go, is over the air (OTA), which Arduino does not supports out of the box, so lets learn how to do exactly that.
In order to get OTA working on your Arduino You will need to flash on it a special bootloader that support OTA, but not just any boatloader, you will need one specific to the type of your communication board - in my case, RF24,”