python3 fixes

[krasi-georgiev]

Signed-off-by: Krasi Georgiev 8903888+krasi-georgiev@users.noreply.github.com

[kekiefer]

Looks fine, thanks for the updates! Just one comment/question in-line for my understanding.

[krasi-georgiev]

I don't see the comment?

[kekiefer]

The change to SPIDEV_MESSAGE_LIMIT here: https://github.com/groupgets/pylepton/pull/66/files/2b99821c16059aab68d49451b538e430fbfbabf6#diff-cd294a51811e671f3ed3f8d662b4441f1a96a5466358a0f0c525224e6ab3b51eR47

[krasi-georgiev]

Without this I was getting OSError: [Errno 90] Message too long and non of the suggested fixes I found for increasing the limit worked

[krasi-georgiev]

more details here

https://github.com/groupgets/pylepton/issues/52

[kekiefer]

OK, IIRC this larger message size used to be required to work with Lepton 3 (at least when this was initially put together for rpi 3).

The comment suggests increasing /sys/module/spidev/parameters/bufsiz to get around this limit, did this not work, or was it just simpler to have small SPI messages?

If this works with Lepton 3.5 on rpi 4, I guess I'm OK with it as it's just one less thing to have to set up.

[krasi-georgiev]

I am running this on Rpi3 with lepton 3.5 and it works

[kekiefer]

Alright then, even better. In that case thanks again for the updates!

[krasi-georgiev]