I had use 433 Mhz RF module with transmitter (FS1000A) and receiver (MX-RM-5V). Interfacing with Encoder (HT12E) and decoder (HT12D) respectively. The problem is that I am using two sets of these set up in circuit one and two. Which means the first circuit having encoder with the same address as the decoder in the second circuit and vice versa. Is it two RF module won't be interrupted by the two receiver side as long as their address is not the same?

(I know I should of use transceiver instead but still attempt to do this). Thanks in advance

 

By setting different addresses for the two systems, each system will ignore messages addressed to the other system. However, if they both transmit at the same time they will interfere with each other. That might mean that neither message is received correctly, or possibly just one of them may be received correctly. They will not both be correct.

This is assuming that they are within range of each other.

 

By setting different addresses for the two systems, each system will ignore messages addressed to the other system. However, if they both transmit at the same time they will interfere with each other. That might mean that neither message is received correctly, or possibly just one of them may be received correctly. They will not both be correct.

This is assuming that they are within range of each other.

Nice explanation and understood. There is another question. What if circuit 1 transmitter wants to send data bits to circuit 2 and at the same time before sending the data bits. Switching off the Vcc of the receiver in circuit 1 via transistor switching and vice versa. Does this methodology help to get both correct? (After sending data bits when circuit 2 wants to send data bits, switch off the Vcc of the receiver in circuit 2 and switch back on the circuit 1 receiver)
PS: My project does need the two RF modules within the range of each other. Both of circuit does not need to transmit and receive at the same time

 

You have two transmitters and two receivers - please confirm.
Which of the following do you want to be able to do:
1. Transmitter 1 sends messages to receiver 1.
2. Transmitter 1 sends messages to receiver 2.
3. Transmitter 2 sends messages to receiver 1.
4. Transmitter 2 sends messages to receiver 2.

 

You have two transmitters and two receivers - please confirm.
Which of the following do you want to be able to do:
1. Transmitter 1 sends messages to receiver 1.
2. Transmitter 1 sends messages to receiver 2.
3. Transmitter 2 sends messages to receiver 1.
4. Transmitter 2 sends messages to receiver 2.

Circuit (1) Transmitter 1 to Circuit (2) receiver 2
Circuit (2) Transmitter 2 to Circuit (1) receiver 1

 

It doesn't matter whether the receivers are enabled or not, the two transmitters must not transmit at the same time. If they do any reception will be garbled.

 

Noted. I will try to disable the transmitter on the receiver side. Thanks a lot

 

You are attempting to create a full-duplex RF communications link.
Designate one circuit as the master. Only the master is allowed to begin transmission. The slave circuit responds to messages received from the master circuit.

 

For what it's worth, I never got these Holtek chips to work reliably.
For 433-mHz applications, I always use RF Solutions RF803E encoder chip with RF803D decoder.
They are based on a Microchip MCU