Topics created by ispybadguys

I have determined that this is a problem in the library. Probably a buffer overrun. It reads exactly 10 bytes at a time, always, and uses a fixed-length buffer (char data;). If more data is pending, it might clobber/lose lines. Almost all I2C read code in the library cannot cope with variable-length GRBL output. I am rewriting those parts of the library.

Thanks that worked!

There is a list below.

M5Unified
https://github.com/m5stack/M5Unified

@Koiru I have not found a solution but I have found a workaround.

The culprit creating the constant reboots are the touchscreen, if I call the begin function without enabling the touchscreen I can get the unit to work instead of doing constant reboots.

To initialize the unit without touchscreen, use the following arguments:

M5.begin(false, true, true, true, true);

The esp32 bord defs in Arduino are controlled by espressif and it looks like they broke a few things.

It seems if I set the i2c rate to 100Khz this works.

Hello @ispybadguys

"SerialEnable =true" is set.

System：begin()
void begin(bool LCDEnable=true, bool SDEnable=true, bool SerialEnable=true, bool I2CEnable=false);
https://github.com/m5stack/m5-docs/blob/master/docs/en/api/system.md

Exsample
M5.begin(true, true, false, true);
Serial.begin(9600);

Do I descripte your phenomenon correctly?

Absolutelly correct.
I have to mark socket sides of all my cables