GW3000-SS

[niehans]

I have the inverter without wifi module so this project is perfect for me.
Thanks for making it possible.

I have some issues.
First I can't figure out witch of these wires of my inverter going to the "TTL to RS485" board.

Second
How should the LEDs on the TTL board blinks? My RX is steady and my TX flashes for every 10 seconds I think

Last:
Which pins are the right ones on the NodeMCU boards?
The label on the boards says D1 and D2 but I'm not sure.

Sorry for all the noob questions but I don't know where else to go.
Best regards
Soren

[ThinkPadNL]

I think you need pin 6 & 8 (RS485A). On the NodeMCU just follow the labeling on the board itself, so the pins top right that have the GPIO5 & GPIO4 labels in your image.

[davevleugel]

What issue do you exactly have, do you have a debuglog?

[niehans]

I moved to GoodWeUSB logger instead after a million failed attempts. It works for me now.

Best regards

[FlashGordon7]

I also had some trouble to figure out how to connect to RS845 on the GW3000-SS.
So I opened the inverter to see what was inside and found that it does not run RS485 but RS422
So you shoud use an max490 (or 2 x max485 one for transmit and one for receive).

And remember to remove the usb cable, as RS485/RS422 gets disabled when the USB is conneced.

My user manual has the connections in reverse order, but use a multimeter to find GND and +7v