Hello, It seems like I have a problem similaire has yours... I would like to use à MAX6675 to get temperature from a Thermocouple K, but this board use SPI.
When I test my code in a ESP32, it's OK. When I test my code in the M5Stack without the M5.begin(), it's ok, but when I include de M5.begin, the value returned by the MAX6675 are 0
Is there any solution ?