I have a MPPT 100|50 solar controller. I pruchased a VE.Direct cable. I cut one end off and attempted to wire it to my teensy 4.1 via an ADUM1201 optocoupler.
The end I cut off left me 4 wires Red, Black, Green, White. When I tested it with my multimeter RED=GRN and BLACK = +5V. I read a few articles and could not get a great understanding if the white or green would be transmit or receive. I have tried both combinations.
I downloaded some code written by Brendan McLearie from github. I set the code to use my serial 6 port. I am never able to connect.
I have switched TX and RX on both sides of the ADUM1201. I am at a loss. Is there some process that needs to be taken to "initialize" the VE.Direct output?