I'm attempting to take 3 boards that have a pushbutton switch on them and use an Arduino every to toggle them all at the same time. The switch is in the top center of the pic and I labeled the pins 1 through 4.
I'm having a hard time figuring out how to get the Arduino to "act like a switch", mostly because the switch on the board doesn't act as I expect. Pins 1&2, and 3&4 appear to be tied. When I power on the board it appears that 1/2 are ground and 3/4 are 5v. I thought great, I should just be able to connect my Arduino to 1 and have it output HIGH to toggle the switch, but that doesn't work.
Interestingly if I manually connect 3 or 4 to ground that does trigger the switch. But I'm not sure how to get an Arduino to emulate that behavior! Any suggestions would be greatly appreciated.
Both boards are being powered by the same micro USB power supply at the moment, but I could also try powering the board I want to control from the Arduino's 5v pin if it matters.