I had two ideas of doing this.
First one is bypassing the button completely so whenever I plug it into the power it immediatelly starts without pressing anything (i dont need different output volumes, 100% all the time is enough). Then I would just add a smart plug between device and mains.
Second is soldering a relay between button and PCB so I can replicate button presses.
I’m not very exepriencing with pcb logic so I would need help with detailed instructions for simplest solution.
In the end I want to integrate it with HA offcourse but that is one part I know how to do
I have a dehumidifier that automatically turns on when power is on so I use a smart plug to turn it on and off with it linked to the govee humidity sensor via automation, this is the simplest way to get devices like this to be “smart” when you don’t need to manage other functions of them and just want to run at 100% when turned on.
Not always a need to overcomplicate things when you don’t need to.
Cool devices. However this is a really nicely designed humidifier in oval shape and this kind of devices would make it ugly. I would like to do all the modifications internally.
I was thinking of using something like this Shelly Uni, however, I don’t know what is the internal voltage of the humidifier circuit. if it’s between 12-24v this would work but I can’t find the voltage specified anywhere on the PCB or I don’t know how to read it.
One way is to have a meter and inspect it. I should probably find an electrician who is more knowledable then me. I was hoping somebody would give me a specific guides where to solder and what kind of devices would suit me so I can do it myself.
You need a multimeter on the DC voltage setting (start at the highest range setting and work down if it is not auto-ranging).
You need to measure across these two white wires:
NOTE: even though the voltage across these two wires is likely to be very low (to drive the logic circuit) the whole thing could be floating at mains potential. This has the risk of killing you if you touch it. It is really not the sort of project you want to take on if you do not know what you are doing.
Having said that here’s how I control my dehumidifier, lots more buttons and LEDs than yours:
Thank you Tom. I will go in that direction. Will try to order Shelly 1 Mini, power it with the mains and then just bypass the button. That way I don’t even have to know the voltage of the system. Probably Shelly 1 Mini is too much for this case, but it’s the easiest thing for me.
