IoT Hottub Temperature Controlled Power Switch
Shopping list
- Buy a TH16.
- Buy a temperature sensor that fits TH16 and your needs. I use the Sonoff DS18B20 waterproof temperature sensor.
- Buy a 3.3 volt USB to seriel adaptor
Documentation & inspiration pages
- I found a lot of inspiration in the pages https://www.redelijkheid.com/blog/2017/12/31/flashing-the-sonoff-th16-wireless-switch and https://tinkerman.cat/post/sonoff-th10-th16-sensors-displays-actuators
- Be aware of dokumentation for ESPeasy
- I flashed my TH16 Ver. 2.1 dated 2019-08-26 with the file
ESP_Easy_mega_20211105_normal_ESP8285_1M.bin. - https://espeasy.readthedocs.io/en/latest/Reference/URLs.html?highlight=csv is usefull for pulling data from the hacked TH16
Configuration after flashing
You need to do a bit of configureing after your TH16 have been succesfullly flashed. I reccomend keeping the TH16 connected to you computer using the 3.3 volt USB to seriel adaptor untill you are certain it works as you intend. I reccomend this of two reasons.
- There is no need to connect it to the mains power before you actually want to use it. This way you are much safer from getting electrical shocks ;-)
- You can use PuttY to monitor the activities that your TH16 is performing including errors... and errors will most probably happen unless you are lucky like nobody else.
Rule Set 1
on sensorTemp#temperature do
// Store current sensor temperature in a dummy variable
TaskValueSet,varTemp,Dummy,[sensorTemp#temperature]
// If temperature is above 37 OR the toggleSwitch state is 1
// then set dummy Switch1 state to 1
if [varTemp#lastValue]>=37 or [toggleSwitch#state]=1
TaskValueSet,Switch1,state,1
else
TaskValueSet,Switch1,state,0
endif
// Set the relay and red LED state to the same state as dummy Switch1 state
gpio,12,0[Switch1#state]
endon