Larry asked 8 months ago
Is ther a way to monitor temperature using a Sonoff R2 ? What i would like to do is measure temperature and then turn o or off at a given temperature. Example, like a furnace but not using this way, turn on AC at 140 deg and off at 90 deg
Sara Santos Staff answered 8 months ago
Hi.
What chip does your sonoff have?
You can try to create something based on this project: https://randomnerdtutorials.com/esp32-esp8266-thermostat-web-server/
Regards,
Sara
Larry answered 8 months ago
Esp8285 is the chip id , I have installed Tasmota , so I can access it mobile.
Larry answered 8 months ago
Esp8285 is the chip id , I have installed Tasmota , so I can access it mobile.
Sara Santos Staff answered 8 months ago
Hi Larry.
Unfortunately, I don’t have any experience with the ESP8285 chip and I don’t have any tutorials about it.
I’m sorry that I can’t help much on this subject.
Regards,
Sara
Larry answered 8 months ago
I know if I remove relay I can access GPIO 12 I think and GPIO 2 or 3 is rx , Gpio14 I would have to solder to the chip . But it would be me just hacking and was hoping you had more information .
Sara Santos Staff answered 8 months ago
We only have information for this old version of sonoff with ESP8266: https://randomnerdtutorials.com/reprogram-sonoff-smart-switch-with-web-server/
Regards,
Sara
Larry answered 8 months ago
Thank you, I guess I will hack away a bit. I think I will have to use a 4.7k resistor on Io2 for the DHT11 to read. I tried it on the rx , got nan for reading.
Larry answered 8 months ago
Sara;
The issue of adding a DHT 11 to a Sonoff was pretty simple when I gave it more thought. The sensor required 3.3v and ground, the source pin I attached a wire to the bottom of the board to breakout GPIO2 and connected it to the DHT11. I also flashed the Sonoff with Tasmota and in configuration I found my ver of Sonoff in my case it was Sonoff Basic (1) , used the pull down box on the GPIO I selected and there it has 2 different call out to DHT11 . I used DHT11 the other not tested is DHT 11_0. Thanks for your support and helpful advice.
Sara Santos Staff answered 8 months ago
Ok.
So, is everything working as expected now?
Regards,
Sara
Larry answered 8 months ago
Well I was able to read temperature quite easily, but unfortunately I couldn’t find a way to make it switch the relay on and off. Too bad , I have been trying to figure out a way to monitor and turn the fan motor on and off at specific temperatures. My wood stove currently use a snap limit switch which is very inaccurate. The switch hysteresis maybe the culprit and that’s why I am attempting this. Problem is it blows cod air.
Sara Santos Staff answered 8 months ago
Unfortunately, we don’t have any examples for it with Tasmota.
But, I’m sure there should be some examples out there.
https://tasmota.github.io/docs/Thermostat/#configuration-for-standalone-application-or-bypass-of-existing-wall-thermostat (not sure if this is compatible with yours)
Regards,
Sara