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For this solution, we are using a Sonoff SV controller. This is a nice controller since it has everything we need to control the heater's remote relays. Additionally, we can power it from the heater itself since it accepts 5-24 volts input and the heater will supply us with 10v. We are going to use the Sonoff SV in isolation mode by removing the two resisters that would normally supply the power to the controller using the input voltage.
Flashing
| Firmware | Download |
|---|---|
| v3.3 |
Once the flashing is complete, it will reboot. You will need to look for pool-heater, in your list of available WIFI networks.
Once connected, navigate to http://192.168.4.1/
From this UI, you can set the WIFI SSID and password for your network. Once it reboots again, you can log into it via http://pool-heater.local/. If that doesn't work, you'll have to find it in your network. Check your router to see if you can find it.
Wiring
Wiring Diagram
Wiring Pictures
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