I have a remote controller for a portable heater, and I am working on a small project to be able to control the fan on/off from an arduino with Bluetooh HM-10 module. I thought a solenoid might work by mounting on top of the remote but it doesn't have enough force, I want to remove the mechanical button and figure out a way to control it without the switch but I don't really know what circuit I should use.
Also, there is a 2.3V difference between the two left pads and 0.2V when the switch is pressed on.
Any idea how I could wire this up to arduino via some switch/relay circuit? Any circuit design/schematic would be helpful.
Here are the images of remote and button traces.