Avoiding wireless connections - EmonTX serial RPiZero solution

[haffle (Julian Berry)]

@Robert.Wall

Do you have debugging messages coming out of your emonTx?

It looks as if you might have some “human readable” output from the emonTx as well as the format (“MSG:45,Vrms:247.75,P1:0,E1:0,pulse:1”) intended for machine consumption. That’s the only way things like “ms” can be transmitted.
“E1MSG” looks like there are some missing characters in the data. You could try reducing the baud rate on the serial connection between the emonTx and the Pi Zero.

Another thought - is the “Tx” line (actually a wrongly labelled Rx input) on the emonTx connected from your Pi Zero? That has caused trouble with non-Shop ESP8266’s in the past - but not exactly the same trouble as you’re reporting.

Hi @Robert.Wall - I think our messages crossed.

It could well be that I mis-wired the connection between the PiZero and the emonTx, but I am 99% sure I followed the second diagram in @pb66 's post here. 4 CT emonBase using emonTx and Pi Zero W - #17 by pb66

But I will make up a second set and see if that changes anything.