Help RF Problem

Hi everyone, i have a big problem.

How can i make the reciever in RF stops when the transmisor go out of range, im trying to power up a contactor, but if the signal of the transmisor go out of range , the contactor is going to still on, and i need that the contactor stops when the signal go out of range. Do you know any solucion for this problem?.

ty, regards.

You have not told us what sort of wireless devices you are using.

An effective way to deal with loss of connection is for the Tx to send messages at regular intervals (perhaps a few times per second) even if the data has not changed. The receiver will know there is a problem if there is a too-long interval between messages.

...R

Hi again, im using 2 Arduinos Mega and the RF 433 Transmitter-Receiver Modules.