Yesterday I learned that j1939 is Canbus, and that our FC6A Plus PLCs support this.
Today I learned that when I plug in the PLC to the network the arduino looses control over the HMI, and the PLC doesnt have it. ..
so theres some unknown networking fault there.
Then I thought I would add a second IP for the arduino to send PLC commands, but my weak wiz 100 seems like it might struggle with that.
I tried my HRs04 ultrasonic transducers, but those wouldnt function no matter what I did including using the arduino with an example sketch.
well dang.
Then I tried to make an Etch-a-sketch from the HMI which also didnt work. my script to draw lines, doesnt execute Im not sure why.
well thats enough for one evening.
But the Encoders work!
https://github.com/Makerspace-Bangor/OnTheLine/blob/main/src/Arduino/test_encoders/test_encoders.ino