Hello
I currently have a setup where I measure temps, displaying to two 7 segment displays using ds18b20 sensors on the 1st arduino.
This is used to manually (at present) set commands away using push buttons on another arduino.
I cant use one arduino due to physical limitations in the setup.
Ideally, at a certain point I would like the 2nd arduino to set away its tasks when it receives a signal at a certain temp from the first one.
Am I right in thinking I need to do the following?
On the temp (1st arduino), I need to do an IF statement to send an Output high to a pin once a certain temp or above is reached?
Then
On the second machine, set the IF statement to wait until it receives the high signal to a local input pin?
Its a very simple 2nd arduino with delays etc and no millis as the procedure it carries out is very linear in scope.
Would I have to do Input Pullup? And would I need to do anything to prevent the pins activating accidently on power up?