Microprobe not working correctly with btt pico

[Henry9254]

just to give my two cents here, had the same issue on an skr pico, it wouldn't stow on it's own, sometimes it would stow after a while, deploying was ok, but stopped working when i sent the stow command, this by using the stock wires, both long and short, i also got a new microprobe just to check if the old one was defective, same results, i managed to get it working by wiring the servo part to the raspberry pi pins directly, and updating the pin reference in order to reference a gpio of the pi. works reliably now.

Originally posted by @MrFanfo in #16

I have the issue where it will go down but it take forever to go back up. How do I get it to reference a gpio of the pi and stuff? I am using a btt pi v1.2

[MrFanfo]

it's been a while since i did that, but for what i remember, the microprobe has 5 pins, 2 for signal for when is pressed and not, these will stay attached to the MCU you currently have, then 3 are for the servo to go up and down, so you wire these 3 to the rpi to the 5v,gnd and a gpio of your choice for the signal, and in klipper config you can add some lines to expose that gpio pin that you can insert in the microprobe config: like this, i'm not really sure on why it works bettwem but it was night and day in my setup, my theory is that the pico is not able to either push enough juice to the 5v or is not sending a clean signal, but honestly i'm not sure.

double check because i'm going by memory. if i remember correctly you also need to do some stuff inside the rpi to be able to expose it's pins as a klipper mcu, alongside running klipper itself

[mcu host]
serial: /tmp/klipper_host_mcu

pin: host:gpio18