FOTA using OptiBoot copy_flash_pages
-
Hello everyone,
as a challenge, I want to try to implement FOTA using the OptiBoot copy_flash_pages to MySensors. The reason is that need a little more flash to implement LoRaWAN on my climate sensors that are not close enough to a MySensors gateway, so I'll do it with a ATmega644P or (for some reasons cheaper on LCSC) a ATmega1284P. As there is more of half the flash available when they run on MySensors, I see it as a challenge to implement FOTA without an additional I2C flash chip.
I'll use this thread as a blog to show and discuss my progress with you. If you are not interested, let me know, so I won't bother you further.
As a start, I ordered two PCBs from LCSC. A CPU PCB for a ATmega1284P or ATmega664P, and a PCB for the radio (and a Flash chip, but this is for some other project). I'll try to attach the schematics. I'll keep you updated as soon as they arrive.Regards!
Edit: PDF did not work, so here are some PNGs:
-
IT WORKS
I got a first working version, using an ATmega1284P running on MightyCore 2.2.2 (as soon as I began developement, they switched from Optiboot to Urboot in version 3.0.0, whicht does not include the copy_flash_pages function anymore, but I'm working on a work around there).
Only thing I could not solve is to do a CRC check of the image after download...
You can try it out here: https://github.com/eiten/MySensors/tree/FOTAInternalFlashTest
It's not beautiful yet with much Serial.prints in it, but maybe it helps you if you find errors.
Hello! It looks like you're interested in this conversation, but you don't have an account yet.
Getting fed up of having to scroll through the same posts each visit? When you register for an account, you'll always come back to exactly where you were before, and choose to be notified of new replies (either via email, or push notification). You'll also be able to save bookmarks and upvote posts to show your appreciation to other community members.
With your input, this post could be even better 💗
Register Login