Manta MP8 v2 shutdown: i2c timeout

[nefelim4ag]

You can check what can be done with I2C here:

MCU 'pico' shutdown: i2c timeout

I will just show you something: The basic issue with PICO, is that it lacks of any error reporting for I2C. There is patch, but I didn’t test it yet: Fixed, reproduced and tested, you can test and leave your result here: rp2040/i2c.c: Check for NACK/Start NACK by nefelim4ag · Pull Request #6692 · Klipper3d/klipper · GitHub (thanks) If it works, It can be merged to klipper which should give a more or less clear error message in general with RP2040 and I2C. SHT15 and SHT21 are different se…

MCU 'pico' shutdown: i2c timeout

I use SHT31 with 1-meter cable, twisted it as I can It works. This will really depend on the cable, sensor, and HW devices on both sides. You can make the signal better by replacing 10k resistors with 4.7k. Or by the usage of level shifters and use 5V for the sensor (if it supports it) and 3.3V for MCU. Both things will make the signal edges steeper. BTW, I think my dirty async software I2C can also help with that, but I did not have issues, and haven’t an oscilloscope to directly…

But I can’t find schematics of Eddy Coil, so can’t be specific.

You can also check/test this one:
STM32: Check for NACK by nefelim4ag · Pull Request #6687 · Klipper3d/klipper · GitHub - it will return NACK, instead of timeout.
And this one:
I2C Error handling by nefelim4ag · Pull Request #6689 · Klipper3d/klipper · GitHub

As far, as it looks at the code side, this should only happen while houming - when Klipper actually queries probe status.