No MCU detected - raspberry pi 3

General Discussion
1

Basic Information:

Printer Model: MK2.5 bear
MCU / Printerboard: BTT SKR Mini E3 v3
Host / SBC: Raspberry PI3 4GB
klippy(1).log (66.0 KB)

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Hello, i am having an issue where the MCU are not detected. I have been following the video step by steå, but it stops until 18:47

(youtube linkt in comment because this forum wont let me post here)

The MCU was detected earlier, and managed to get to 19:12 in the video, except that the flashing was unsucessful so i have to do it again. This time MCU will not be detected

2

youtube link: https://youtu.be/N41JY1Gukuk?si=W8cZP3QaCKk7OIn1&t=1127

3

found another post and it seemed running sudo dmesg does provide additional info so i will attach it as well. ignore the undervoltage reports. i literally connected the raspberry pi to a 5V phone charger so i dont know why it reports undervoltage

sudo-dmesg.txt (37.5 KB)

4

No, the system does not report this for fun. Apparently your power source is not sufficient. This is very likely to cause issues.

I do not care about YT and surely do not check if the video is of any use. Follow:

5

The Raspberry Pi 3 requires 5.1V at 2.5A. Most phone chargers use a maximum of 2.1A, which isn’t enough to run a RPi properly. I’d recommend an official PSU, like this one.

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Raspberry Pi Org recommends 5.1V @ 2.5A

7

Oops! I missed that. I updated my reply. Thanks for catching that.

1 Like
8

Thanks! I managed to get the printer working (picture)

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May i also ask if you know a good tutorial/steps you recommend to calibrate the printer?

9

fixed it, used another charging brick and it seems theres no issue anymore

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