I just got my M5AtomS3 running with M5Unified (with very little changes from my M5Stick display code - other than fonts.) The buttons changed, and I'm not sure what a double click is yet..

Anyway, your reference to the "static pin value" is where I'm stuck as the M5AtomS3 references the FastLED.h and doesn't compile. I actually want to use FastLED.

Assuming this is the same error, can you document how you got it to compile? (If not I'll post my own problem).

/Users/scott/Documents/Arduino/libraries/FastLED/src/FastLED.h:304:39:   required from 'static CLEDController& CFastLED::addLeds(CRGB*, int, int) [with CHIPSET = SK6812; unsigned char DATA_PIN = 23; EOrder RGB_ORDER = (EOrder)66]'
/Users/scott/Documents/GitHub/M5Unified-ESP_IOT_Nov24/ESP32_M5Unified/ESP_IOT/src/SensorClass/KeyUnitSensorClass.cpp:124:54:   required from here
/Users/scott/Documents/Arduino/libraries/FastLED/src/platforms/esp/32/clockless_rmt_esp32.h:358:46: error: static assertion failed: Invalid pin specified
     static_assert(FastPin<DATA_PIN>::validpin(), "Invalid pin specified");
                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~

Anyway, I solved my initial problem - it was related to not setting up the ext_i2c correctly. I also used a mix of M5Unified and M5AtomS3 libraries because out of the box the FastLED that is referred to from M5Unified does not compile and fails with a static pin value check at compile time. I solved all this (and learned a lot).

Now the only problem I have is: how do I connect the two small M5 modules with a male to male adapter. The grove cable works fine for me but I want a zero length grove male 2 male connection so I can print a 3D case and put both modules into it.