Standby mode for an ASK RF transmitter and HT12E combination?
I am working on a project that uses the HT12E encoder to encode binary codes and an ASK RF transmitter that transmits the data at 433 MHz.It will be received by their respective counterparts i.e,HT12D and ASK RF receiver.The range is about 25 metres.The transmitter is at the roof of my house while the receiver is on the ground floor(The circuit is for detecting the water level in a tank).
The transmitter is not required to transmit 24/7 but only when the receiver is switched ON.It can be achieved by making the transmission enabling pin of the encoder ic high when transmission is not needed but for that I would either have to go to the roof and turn the transmitter ON(which beats the purpose) or I'll need another transmitter-receiver pair which would occupy positions opposite to the pair that already exists.(It would essentially be a transceiver then).
But I don't want another pair of transmitter-receiver and neither do I want the transmitter to transmit continuously .
What I need is a solution to install a standby mode for the transmitter and are there any ways to do that keeping in mind the above requirements?
Any help will be appreciated and thank you for reading my question.