Actually continuing the discussion from here: IotaWatt 4.0 - #111 by overeasy
But as there is now an own three phase thread I will continue here:
I played around with this and tried to set up the IotaWatt for three phase systems. But I did not succeed with this. Btw there is a simple method to test a three phase setup with only one phase. Set all three CTs around the single phase. Now the first CT should of course measure the correct power, the second and third will show exactly the half of that and the value is negative and the power factor is also -0.5 if you have a pure resistive load on the single phase like a kettle causes. The reason is that cos(120) and cos(240) are both -0.5.
Actually I wanted to post some screenshots of what I tried, but I can’t connect to the IotaWatt at the moment. The reason is that I moved the IotaWatt to another location for the three phase test. At the new location the IotaWatt opened the access point again (which was of course what I suspected) but it was not possible to connect. I tried a half an hour with a lot of hard resets till I eventually succeeded. Back at home I can now reproduce the problem with a mac and a windows laptop and I did not succeed till now.