Yes, I tried switching TX and RX many times. And I tried different RS485 modules…another of the same board and another type. I’ve also tried testing the voltages of wires 7 and 8 on my ethernet cable connected to the RS485 port and they show voltage, but according to what I’m reading, one should be lower than the other and they should vary as data is transmitted. They both show steady voltage. Also tested the other wires with no luck. I have some wiring/plugs that will hopefully allow me to connect directly to the CNC6 plug and test. Wish me luck, and thank you for your help, I appreciate it!
It depends on how you tested voltage, if you’re using a multimeter it’s probably not fast enough and will show an average voltage only.
Another thing you can try is to not connect TX/RX at all and see if the RXD LED still lights up. If so, we can assume that it’s showing bus activity and the issue is probably with the component or the RS-485 transceiver.
I have tried multiple RS-485 transceivers, but only 1 ESP32. Logs show it connecting fine into ESPHome/Home Assistant, but with no data. Maybe I should try a new esp32 just to be sure. I do have a few extra
Control your baud rate and device ID settings from inverter UI.
Use CAS Modbus Scanner software to scan any registers available.
Thanks, yes I did confirm those on my inverter and that they match
We’re also discussing this issue here.
As per my last comment, I wonder if there’s perhaps a setting required to get the inverter to talk on the RS-485 bus at all.