Thanks for the code. As of now, I don’t have the FTDI I will have to modify your code and try to parse the data to ThingSpeak or Blynk.
Regarding the FTDI, what type are you using? There are different types so I’m not sure what type can work. Are one of these two devices suitable?
Regarding powering the MAX485, I use Wemos 5V and GND pins, powering from the tracer was the next step in my mind (I checked and the first 2 wire are giving 4.5V the orange/white and orange wires of the ethernet cable).
On my MAX485 there is only one LED and when I connect the 5V and GND it’s steady lightning no mether if I try to get the reading or not. I can see a flashing only when I connect the pins DI, DE, DE, RO, and GND to the Wemos and not connecting the 5V. It’s that “normal” behaving or not?
Paolo