In the true way of Uno2 initiating the transmission you would need a multi master setup. That can get complex.
It's probably easier to make the RP poll Uno2 regular to see if it has something to tell and if so, read it.
In the true way of Uno2 initiating the transmission you would need a multi master setup. That can get complex.
It's probably easier to make the RP poll Uno2 regular to see if it has something to tell and if so, read it.