For those who are interested, the code at the end of this tutorial works well. The tutorial is about strings, but works in exactly the same way for base64-encoded jpg images. All you have to do after decoding the string (containing the base64-encoded jpg image) is to write it to SPIFFS and then call M5.Lcd.drawJpgFile(SPIFFS, jpgFileName, 0, 0);

That mean is , you have to reinstall the pyserial module https://pypi.org/project/pyserial/#files

@crisdeodates that is why we suggest you use Maixpy or V-function. because maixduino doesn't have enough examples for it.

The library is now available on Platformio ("M5 Stack 4Relay Library") and Arduino IDE Library Manager. Can I use your 4-Relay picture to add in my Readme.md file on Github ? And/or add this link: https://shop.m5stack.com/collections/m5-unit/products/4-relay-unit ? If you want, you can add my Github link to your Arduino Example section.

@rcoppens ESPNow !

Yes, I have had this issue as well while trying to develop a smars quad bot.

Hi do you find a solution ? also interest by this. Thx

Found the problem. After deleting an old sdfat and installing a new one it was working perfect on my Core2. Thanks for hiis fine explanation. Was verry helpfull. Cheers Jan

@m5stack How can I get bin file from the device?

SOLVED... thanks to https://github.com/arduino/arduino-cli/issues/1002 It was just a "Win10 too long path" issue

There is aM5StickPlus library !! Thanks a lot!

Hello, Could you please include the imports at the beginning of the code? did you import the proper library? it seems that it says the SDCard failed, could you run the factory test image on your old core to see if you get any issues?

Hello @flyceo not sure what's going on on your side as your code runs and works fine here - using PlatformIO as well. I see the text and the yellow square just fine. What does your platform.ini look like? Thanks Felix

Hello @Pat you are welcome. BTW: you do not necessarily need to touch the M5Stack lib - M5.begin() actually has parameters, one of them is SerialEnable, if you set this to false you can setup Serial in your code anyway you like. Thanks Felix

You should be able to run up to 5 relay units connected to the i/ohub (pbhub).