You'll need to make a closed circuit between the arduino ground and the digital pin, and ensure that there is voltage present that is above a set threshold. (I do not know what that is)
At least, I think this is how a pin is set to HIGH.
You'll need to make a closed circuit between the arduino ground and the digital pin, and ensure that there is voltage present that is above a set threshold. (I do not know what that is)
At least, I think this is how a pin is set to HIGH.