Dear all, I am doing a project on my filed experiments, with about 100 mega2560 used in the project. Each mega2560 control a tank (turn on/off heating, reading temperature and so on). The sketch (user APP) in the mega2560 is the same for all of them. Each mega2560 communicate with the server (a PC w…

Thanks for your answer. Just checked, maybe Jural's suggestion will be easy for the current project :grinning:

[image] GitHub - JAndrassy/ArduinoOTA: Arduino library to upload sketch over network... Arduino library to upload sketch over network to Arduino board with WiFi or Ethernet libraries - GitHub - JAndrassy/ArduinoOTA: Arduino library to upload sketch over network to Arduino board with W... …

Take a look: [image] Programming AVR with an ESP32 with arduino as ISP Avrdude, stk500, Bootloader issues You can try this method:

[image] qingyi1207: (It seems that hex file was consist with many lines begin with ":", The hex file is in Intel Hex Format.

just to brag JAndrassy/ArduinoOTA/blob/master/examples/Advanced/SD2Flash2BootAVRHex/SD2Flash2BootAVRHex.ino /* This example reads HEX file from SD card and writes it to InternalStorage to store and apply it as update. To read Intel HEX file format ihex library by Kimmo Kulovesi …

Thanks Juraj, a very impressive way. This can also use IDE as the update tool, WiFi just works as a "line". But I should find each IP address, which might be 100, and might changed. Also, the ESP32 should connect to Rx0/Tx0, which is not connected at this moment. I need to change all the boards

[image] qingyi1207: Also, the ESP32 should connect to Rx0/Tx0, which is not connected at this moment. I need to change all the boards esp32 doesn't have to be on RX0/TX0. You can use any transport way for the binary if you use the updater class (InternalStorage) directly. even with WiFiEspAT …

Dear Juraj, thanks for your answer. I just read your codes more deeply, I think that the branch SD2Flash2BootAVRHex might work fine to my project. If understand correctly, the HEX file could be read from SD or Serial, and then write to flash of MEGA2560 in my case by InternalStorage.write(b);. When …

great, thanks for your reply :grinning:

I recommend you to use a binary update file. Then you can skip the conversion from the hex file to binary on MCU. https://github.com/JAndrassy/ArduinoOTA#atmega-support

Dear Juraj, just tried your package ArduinoOTA these days, not sure why there is something wrong on the InternalStorage.write(ihex->data[i]);. I think that the bootloader of Optiboot was upload correctly, but no idea how to test it :joy: It would be great if any comments from you. Here is my code: …

How to use flash for mega2560 update sketch (update user APP)

Projects General Guidance

FernandoGarcia March 26, 2023, 9:52pm 3

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How to use flash for mega2560 update sketch (update user APP)

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