@Ironman, when I ready about rs422 it seems to have thresholds on 0 and 5v, and rs232 on -3v3 and +3v3 so how can it work with the 3v3v pin and gpio. Will that not just swing the voltage between 0 and 3v3 and not meeting the thresholds for the signals?
Obviously it works as you have demonstrated it... I just don’t understand how..
Update: was a bad source. Seems rs422 just needs 200mv difference (to each side so I guess the delta must be greater than 400mv):
https://www.bb-elec.com/Learning-Center/...S-422.aspx
It must be my tx that is the issue. The 8N1 seems correct as well. I’ll connect the tx to serial and read the data.
Br,
Peter
Obviously it works as you have demonstrated it... I just don’t understand how..
Update: was a bad source. Seems rs422 just needs 200mv difference (to each side so I guess the delta must be greater than 400mv):
https://www.bb-elec.com/Learning-Center/...S-422.aspx
It must be my tx that is the issue. The 8N1 seems correct as well. I’ll connect the tx to serial and read the data.
Br,
Peter