In my opinion after using multiple manual and electronic control methods the best homebrewing temperature control is hands down the inkbird itc 308 wifi.
Wifi temperature controller brewing.
And it works with 2 4ghz wifi not 2g or 5ghz wifi.
This means that it can either trigger a unit to turn on to heat up to a required temperature or cool down to a specific temperature.
Please remind that it supports andriod 6 0 and above.
The exceptions being of course the afore mentioned immersion and fts units.
We got frustrated with a lack of good tools to continuously monitor and control the brewing process so we decided to build some.
All the while logging temperature data.
Wifi temperature control with the wiferm temperature controller you can monitor and control your fermentation temperature from anywhere on the planet.
This 1436a wifi digital temperature controller suppots both iso and andriod with free app whllhi 2018 which with a clear and convenient page for you to remote monitor.
Using your computer or smartphone web browser connect the wiferm to your wireless network plug in the temperature probe and begin receiving temperature updates at 30 second intervals.
The cost value ratio is outstanding having everything integrated into a single unit makes it far more convenient than building your own setup and using a cheaper control unit.
Willhi 1436a wifi temperature controller wifi digital thermostat outlet bluetooth remote control 110v temp controller heater and cooler with waterproof probe brewing fermentation breeding greenhouse 4 2 out of 5 stars 21.