Posted January 22, 20223 yr I need a power meter that can allow smaller appliances like TVs or fridges, but shutdown when connected to power hungry appliances like kettles or hairdryers. On the face of it, the Sonoff Pow R2 can do it. But when I tested it with my fridge, the default firmware cannot distinguish between the startup spike of my fridge and a hairdryer (both are of order of 1 kW, but the former is only short lived). Right now, I'm installing the Sonoff LAN controller on my Home Assistant, in the hope that it can configure additional variables on the default firmware. It looks like the Tasmota firmware will work, but I don't have a 3.3 V serial port to reflash my Pow R2. Can someone in Pretoria maybe help me with this ? Are there any other devices that can do this correctly ?
January 23, 20223 yr 16 hours ago, Nic Roets said: I need a power meter that can allow smaller appliances like TVs or fridges, but shutdown when connected to power hungry appliances like kettles or hairdryers. On the face of it, the Sonoff Pow R2 can do it. But when I tested it with my fridge, the default firmware cannot distinguish between the startup spike of my fridge and a hairdryer (both are of order of 1 kW, but the former is only short lived). Right now, I'm installing the Sonoff LAN controller on my Home Assistant, in the hope that it can configure additional variables on the default firmware. It looks like the Tasmota firmware will work, but I don't have a 3.3 V serial port to reflash my Pow R2. Can someone in Pretoria maybe help me with this ? Are there any other devices that can do this correctly ? If you use the OPS function of the Pow 2 it can give you an idea what your start up power is
January 23, 20223 yr 20 hours ago, Nic Roets said: I need a power meter that can allow smaller appliances like TVs or fridges, but shutdown when connected to power hungry appliances like kettles or hairdryers. On the face of it, the Sonoff Pow R2 can do it. But when I tested it with my fridge, the default firmware cannot distinguish between the startup spike of my fridge and a hairdryer (both are of order of 1 kW, but the former is only short lived). Right now, I'm installing the Sonoff LAN controller on my Home Assistant, in the hope that it can configure additional variables on the default firmware. It looks like the Tasmota firmware will work, but I don't have a 3.3 V serial port to reflash my Pow R2. Can someone in Pretoria maybe help me with this ? Are there any other devices that can do this correctly ? You can use sonof without flashing tasmota https://github.com/AlexxIT/SonoffLAN I've go it running on my home assistant setup and it works quite nicely. It only connects to your ewelink account to update the names of your devices, other than that it is all offline mode
January 23, 20223 yr Author Ok. I managed to set up that integration on my Pi running HA. Then set up polling of the power sensor at 5 second intervals and got this graph. I guess I'll now be able to write code to shutdown overloaded circuits. It will run on the Pi, so I need to make sure the Wifi is as reliable as possible. Edited January 23, 20223 yr by Nic Roets
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