Since the ESP8266 can self program on Wifi, can we use it to program Arduino too with the binary sent via Wifi? My Arduino is connected with Reset + RX + TX pins and shared power.
Has this been already done?
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If you use Linux, you can use a simple Telnet to Serial sketch in esp8266 to upload with avrdude to Uno over esp8266. Only on Linux can avrdude use telnet to do a serial upload.
For upload from IDE on any OS there is JeeLabs ESP Link firmware for the esp8266.
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plenty of ways on other os to patch things so arduino looks to be connected over serial as far as avrdude is concerned- for example com0com makes virtual serial ports...Abel– Abel2022-03-17 23:24:42 +00:00Commented Mar 17, 2022 at 23:24
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haven't done it for avrdude yet, but i did have the need to do something similar for a serial user interface program to connect to a stream that had to be encapsulated by ssh first.Abel– Abel2022-03-18 11:54:08 +00:00Commented Mar 18, 2022 at 11:54
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tested with pi in the middle (avrdude-com0com-customExe-pi-customProgram-uno). gotchas found: bootloader baud, and stable re-entry to bootloader. no reason to believe any other program attempting this over serial would behave differently. i implemented re-entry via usb port poweroff and poweron via rpi uhubctl, but it might be possible with hardware (reset pin), a modified bootloader, or crashing? the main on command (casting 0 to a function pointer and calling it).Abel– Abel2022-03-20 13:43:43 +00:00Commented Mar 20, 2022 at 13:43
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1i didnt use your sketch or telnet. Just wanted to prove you are not limited to avrdude linux to get the job done- for me avrdude thought it was talking over serial and uploaded just fine. Can make a connection between avrdude and the nets with other programs.Abel– Abel2022-03-20 15:19:57 +00:00Commented Mar 20, 2022 at 15:19