Humidity sensor with relay?

[JerryMungo]

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[Neuk_]

Sonoff TH16 has both temperature and humidity.

 

[Neuk_]

Does it need WiFi to do the job of switching he relay?

I am not entirely sure, you can set it to switch on/off at a certain temperature or humidity but I am not sure if once saved this logic sits in the switch itself, more likely it sits in eWelink or HA which needs to communicate with the switch.

 

[ArmatageShanks]

Linky

 

[hilton]

If you lose internet access the schedules or actions will still continue until you lose power. This is with eWelink.

 

[Gielie01]

OK... that sounds about right. Can anyone else confirm?

I recall on stock firmware its better to have them connected to wifi, as they sync time, and when that goes funky they stop working properly.

I run a th16 with esphome to control an extractor fan from HA, its better that way as I use very complex rules, like not to run the FAN at 2AM, if its "humid"

 

[Magnum]

Does it need WiFi to do the job of switching he relay?

Might need to reflash it. but yes. it can operate separately. A dht11 sensor coupled to a 3.3v/5v relay on arduino will work perfectly. you can even scale that arduino down to an AT tiny if you can manage the more difficult programming interface. (no usb port. )

 

[Magnum]

I am not entirely sure, you can set it to switch on/off at a certain temperature or humidity but I am not sure if once saved this logic sits in the switch itself, more likely it sits in eWelink or HA which needs to communicate with the switch.

Most of the sonoff modules run a power supply, ESPmicrocontroller with WIFI and a relay.

The esp is fully capable of functioning by it's self getting time and date from a time server, Hosting a Web interface ect.

The amount of pins are a bit limited in sonoff but for switching a fan from a temp/humidity sensor is nowhere near maxing out the Pin count or processing cycles.

 

[Thor]

I am not entirely sure, you can set it to switch on/off at a certain temperature or humidity but I am not sure if once saved this logic sits in the switch itself, more likely it sits in eWelink or HA which needs to communicate with the switch.

Sits on switch


It can operate without internet

 

[Gielie01]

Yeah, I just don't want insecure crap on my LAN. I may just set up a dedicated VLAN for this. Thanks for the feedback, it sounds about what I'm looking for.

I have dedicated vLans for "NOT" and IOT devices, works well, some devices unfortunately require internet to work, like "she who shall not be named"

 

[vic777]

Any ESP8266 board will run Tasmota, D1 mini has a nice small footprint, you'll find support for relays and most popular humidity sensors in Tasmota