Thanks @Robert.Wall The (OEM shop) AC & DC power bricks are plugged in, and the light in the RPi (which is powered via jumper wires from the emonTx) is showing green. The CT is plugged in to CT1, and I had restarted the emonTx after having done so. Swapping over to the CT2 output (& restarting emonHub) didn’t change things.
This is the RPIZero’s emonHub log - from this it would appear that no Input data is getting to the emonSD on the RPi.
2021-03-03 11:06:50,490 DEBUG SerialTx 4 Timestamp : 1614769610.476852
2021-03-03 11:06:50,492 DEBUG SerialTx 4 From Node : Serial_PiZero_barn
2021-03-03 11:06:50,493 DEBUG SerialTx 4 Values : [19437, 0, 0, 0, 0, 0, 0, 1]
2021-03-03 11:06:50,495 DEBUG SerialTx 4 Sent to channel(start)' : ToEmonCMS
2021-03-03 11:06:50,497 DEBUG SerialTx 4 Sent to channel(end)' : ToEmonCMS
2021-03-03 11:06:50,653 INFO MQTT Publishing 'node' formatted msg
2021-03-03 11:06:50,655 DEBUG MQTT Publishing: emonhub/rx/Serial_PiZero_barn/values 19437,0,0,0,0,0,0,1
2021-03-03 11:06:50,665 DEBUG MQTT Publishing: emon/Serial_PiZero_barn {"MSG": 19437, "Vrms": 0, "P1": 0, "E1": 0, "T1": 0, "T2": 0, "T3": 0, "pulse": 1, "time": 1614769610.4768522}
2021-03-03 11:06:54,059 DEBUG emoncmsorg Buffer size: 3
I do know that power(?) is flowing out of the inverter (as evidenced by the inverter display showing a generating value, and my emonPi also shows “negative use” (ie exporting power).
So, and sorry to being a bit thick here, but what is “in-between” the CT sensor and SerialTx Values line?
I do have a programmer, but TBH am not very au-fait with using it