<![CDATA[File "base/stepmotor.py", line 1, in __init__ ValueError: invalid pin]]>Hi everyone

I am trying to use an Atomic stepmotor base (SKU:A132) with an Atom lite (SKU:C008) Uiflow2.0 (v2.2.8) but it does not work.
I get this error message :
File "base/stepmotor.py", line 1, in init ValueError: invalid pin
I think pins are sets correctly :

38d1dcce-b905-4aae-a05e-d21985540e9c-image.png

base_stepmotor = AtomicStepmotorBase(22, 23, 19, 25, 21)

15997103-342b-4b44-b740-150df10abb9a-image.png

I do not understand why it's throwing error and what i am doing wrong ?

]]>https://community.m5stack.com/topic/7589/file-base-stepmotor-py-line-1-in-__init__-valueerror-invalid-pinRSS for NodeSat, 07 Mar 2026 05:52:19 GMTSat, 31 May 2025 16:47:08 GMT60<![CDATA[Reply to File "base/stepmotor.py", line 1, in __init__ ValueError: invalid pin on Sun, 01 Jun 2025 08:45:49 GMT]]>Hello @Schnoble

clever! Maybe you could put your modified version into an Execute mpy code (eg. import)? This block can be found under System.

Thanks
Felix

]]>https://community.m5stack.com/post/29147https://community.m5stack.com/post/29147Sun, 01 Jun 2025 08:45:49 GMT<![CDATA[Reply to File "base/stepmotor.py", line 1, in __init__ ValueError: invalid pin on Sun, 01 Jun 2025 08:23:55 GMT]]>For what it worth, I make it work by switching to micropython and replacing

from base import AtomicStepmotorBase

by a modified version of stepmotor.py before downloading the code

If you like using blockly, you need to paste modification each time though...

]]>https://community.m5stack.com/post/29146https://community.m5stack.com/post/29146Sun, 01 Jun 2025 08:23:55 GMT<![CDATA[Reply to File "base/stepmotor.py", line 1, in __init__ ValueError: invalid pin on Sat, 31 May 2025 18:53:38 GMT]]>Thanks @felmue
Let's hope

]]>https://community.m5stack.com/post/29142https://community.m5stack.com/post/29142Sat, 31 May 2025 18:53:38 GMT<![CDATA[Reply to File "base/stepmotor.py", line 1, in __init__ ValueError: invalid pin on Sat, 31 May 2025 18:04:53 GMT]]>Hello @Schnoble

you are not doing anything wrong I think. The issue is with UIFlow2 firmware for M5AtomLite. As far as I can tell the default pins are for M5AtomS3 (Lite) and there is one additional pin, which cannot be set from the init block and it is set to a GPIO (8) only available in S3. See here.

BTW: I've created a PR for the issue. So hopefully it will be fixed in a future firmware version.

Thanks
Felix

]]>https://community.m5stack.com/post/29141https://community.m5stack.com/post/29141Sat, 31 May 2025 18:04:53 GMT