I have emonbase set up with esp8266 and transmitting data to my mqtt server. What I am wondering however is what is exactly in the data? The current clamps (CT[1-4]) look like Watts to me, but what is the VRMS? Is it voltage*1000 or something like that? That doesn’t make complete sense to me, so that’s why I’m asking. I look forward to your response.
I’ve googled around and browsed the help sections a lot but couldn’t find what I’m looking for. I’m using the AC-AC power supply supplied with emonbase.
In that case, you need to look in the sketch running in the emonTx. Power will be in watts, the voltage is probably in centivolts (voltage ×100) in order to preserve two decimal places when truncated to and transmitted as an integer via radio, and the same value is sent by the serial output, which is probably what you’re looking at.
That’s in the right ball-park, it’s responding to the load so it’s not far off. Where is your a.c. reference coming from - because not all a.c. adapters give the same output voltage, and that will change the calibration. You need to go through the calibration procedure for the emonTx. See Learn → Electricity Monitoring → Current & Voltage → Calibration Procedure.
I’ve just noticed you mention 3 phases. If you’re using the 3-phase PLL sketch, then follow the calibration instructions in the documentation for that.
And note: the 3 a.c. adapters from the shop all require different calibration constants.
(voltage ×100) in order to preserve two decimal places when truncated to and transmitted as an integer via radio, and the same value is sent by the serial output, which is probably what you’re looking at.