I rent a house which has an absolutely brilliant robotic cleaner called a ‘Dolphin’. It works well except you have to switch it OFF, wait 20 seconds and then switch it ON again for it to operate.
Apparently the next model up has a bluetooth interface for many hundreds of dollars more. If I want that option, after the fact, I would have to replace the whole cleaner…not great news!!
I thus set-about making a “robotic finger” to mimic this action every day, at a set time.
I use the famous Raspberry Pi 3. The first version of the ‘Robotic finger’s was, ummm… unreliable mechanically, I thus redesigned it. It also has a camera which shows me that the pump is running and the LCD display of the Davis pH meter. The first version is shown below:
The ‘Robotic finger’ work-bench tested as follows:
I have also made one using to microwave oven fans and a microwave often lamp, for the heat source. This one uses the Wemos Lolin32 with OLED display…which reports temperature, humidity and heat index as well as the low and high set-points of the temperature control band. The photos are as below: