FiPy/Pyscan problem

[soulsurfer]

I have a FiPy running "Pycom MicroPython 1.19.0.b4 [v1.9.4-50f84dd] on 2018-07-13; FiPy with ESP32"

I have just plugged it into a PyScan and I tried running the example main.py from:

https://github.com/pycom/pycom-libraries/tree/master/pyscan

I am told:

Traceback (most recent call last):
  File "main.py", line 14, in <module>
ValueError: incompatible .mpy file

I now have a copy of MFRC630.mpy uploaded to both /flash & /flash/lib using Filezilla, just in case.

What else can I try?

[dan]

Hi @soulsurfer,

Thanks for noticing! I'll let the team know. We're using the .mpy version to save memory, so your project can take up more space.

May I ask what are you missing from the documentation?

[robert-hh]

@soulsurfer That's nothing to be sad about. I stumbled over that incompatibility last week, and it caused me some time to discover the reason for than unexpected behavior. The make scripts for the firmware do not force re-building of mpy-cross when a different branch is checked out.

[soulsurfer]

Thanks @robert-hh. That explains my issue! The perils of being a micropython noob :(

I didn't build it myself. I just grabbed it using git and FTPed it to the FiPy. The documentation is rather sparse!

Thanks to your hint I have now located where MFRC630.py was hiding:

https://github.com/pycom/pycom-libraries/tree/master/lib/MFRC630

[robert-hh]

@soulsurfer How did you create the mpy file? Which version of mpy-cross did you use? The versions created with the master and development version are different, the generated code is incompatible.