http://retinal.dehy.de/docs/ 2026-04-07T13:15:31+02:00 http://retinal.dehy.de/docs/ http://retinal.dehy.de/docs/lib/tpl/minimal/images/favicon.ico text/html 2018-02-16T11:32:59+02:00 http://retinal.dehy.de/docs/doku.php?id=technotes:sonoffwifi:calibrate&rev=1518777179&do=diff Somewhat surprisingly, Sonoff POWs don't seem to be very well calibrated. This might just be an aspect of the design, or of course it might be that they get calibrated at the factory using the standard firmware, but after the device has been re-flashed with Tasmota, this calibration gets lost. Either way, it's likely that the power readings you get will be inaccurate until you've followed these instructions. text/html 2018-03-03T13:19:03+02:00 http://retinal.dehy.de/docs/doku.php?id=technotes:sonoffwifi:commands&rev=1520079543&do=diff Once you've got the Tasmota firmware installed in your Sonoff POW and it's contactable on your network, you'll (probably) want to configure it to do something useful. I installed Mosquitto on a Raspberry Pi (including the client package) and configured Tasmota to talk to it: