Taping into buttons

[cheapie408]

I have a variable speed pump that does not have wifi and would like to add one.

Found a youtube video of someone taping into the buttons of the controller using a WiFi relay to mimic a button press. Is it safe to assume that most if not all buttons are some forum of dry contact?

The buttons are connected using a ribbon cable to the board in the photo below. There are a total of 7 buttons on the keypad and a total of 9 pins on the ribbon cable. I measure the current and it appears that it's operating on 5V.

I don't know much about electronics but I'm guessing the keypress should send 5v to whatever the trigger is?

What's the best way to figure out which buttons to press? Would I be measuring for continuity or voltage?

 

[Lightium]

Maybe you should move this inquiry to here.

 

[ZipZapOuch]

I don't know much about electronics but I'm guessing the keypress should send 5v to whatever the trigger is?

Sometimes the button is connected to 5v with a resistor. the button connects button to ground when pressed.

Otherwise, the button is connected to ground with a resistor. When the button is pressed, it connects the button to 5v.

 

[ChrisP58]

You need to measure the voltage on the pins while operating the buttons to see what changes as the buttons are pressed and released.

 

[ZipZapOuch]

Maybe you should move this inquiry to here.

He's not programming or changing a microcontroller - he's asking how to connect to a switch circuit.