Avoiding wireless connections - EmonTX serial RPiZero solution

[borpin (Brian Orpin)]

@haffle, I’d second using the serial output to a PiZero. Just as cheap as the ESP8266 and far more robust.

EmonTX to Rpi - Direct Serial Connection

So have the signal and gnd connected as per the photos have tried com_port= /dev/ttyUSB0 in the file emonhub.conf and com_port = /dev/ttyRS485-0 neither seem to work nothing is appearing in the inputs screen any way of fault finding. The TX unit has no lights on it well just one red light on start up for a 5 seconds.