Thermal Sensor MLX90640: Python example not working

Products & Technology Raspberry Pi
#1

Hi there,

my MLX90640 is working in the sense that BasicReadings.py gives me the expected rows of pure data.
Anyway, the Python example seeed_python_ircamera.py (executed via ircamera ISC MLX90640) starts a blank window, but is terminating soon. Here’s the error code:

Traceback (most recent call last):
  File "/usr/local/lib/python3.9/dist-packages/seeed_python_ircamera.py", line 99, in run
    self.readData()
  File "/usr/local/lib/python3.9/dist-packages/seeed_python_ircamera.py", line 87, in i2cRead
    self.dataHandle.getFrame(hetData)
  File "/usr/local/lib/python3.9/dist-packages/seeed_mlx9064x.py", line 125, in getFrame
    status = self._GetFrameData(mlx90640Frame)
  File "/usr/local/lib/python3.9/dist-packages/seeed_mlx9064x.py", line 154, in _GetFrameData
    raise RuntimeError("Too many retries")
RuntimeError: Too many retries
Aborted

Any hints?
Thanks in advance!

#2

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Hi, my English is not very good, please forgive me, do you run in python?
In my tests there were no similar issues with the use of arduino on wiki.

#3

Hi @Seeed_Jostar ,
thanks a lot for your fast reply.
I’m running in python on a Raspberry Pi.
I discoverd by accident a solution: Changing RefreshRate from 8 Hz to 4 Hz did the trick.
I’m assuming that’s because I’m running a pretty old hardware: A Raspberry Pi 2 from 2014 - good old days. :slight_smile:

Here is what I did:
Editing
/usr/local/lib/python3.7/dist-packages/seeed_python_ircamera.py
and changing
seeed_mlx90640.RefreshRate.REFRESH_8_HZ
into
seeed_mlx90640.RefreshRate.REFRESH_4_HZ

Thanks again and good bye!