Using 2 pairs of RF modules

Projects General Guidance
1

Hi guys,

I successfully managed comunication between Mega (Tx) and Nano (Rx).
I have used 433Mhz modules.
Now I want to try to add another pair od RF modules, to have 2-way communication between them.
I know that there will be problem if they are on same frequency, so I came to the following questions:

  1. Is there any way to change their frequency (because on receiver there is marked 315, 330 and 443Mhz)?
  2. Can I use same frequency but 'tell' in code both controllers which one will ignore certain messages (bytes or strings)? Because they will not send same data to each other.

Any idea will be great!
Thanks alot!

2

You could have an identifier so the Rx knows if it should respond. Something like first character is A for one and B for the other.

Weedpharma

3

That's nice idea. Thank you weedpharma :slight_smile:

I wonder whether the signal, for example, will arrive from Mega to Nano without problems (and vise versa), although Nano will send (different) data to Mega at the same time?
Is there gonna be some conflicts with signals?

4

Hi,
Before we commit some suggestions.
What are your RF units you are using?

Tom.... :slight_smile:

5

Your OP only suggested one way comms. Are you using two way comms?

Weedpharma

6

TomGeorge:
Hi,
Before we commit some suggestions.
What are your RF units you are using?

Tom.... :slight_smile:

Hi Tom, I'm using 433Mhz RF modules, like shown on picture below:

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weedpharma:
Your OP only suggested one way comms. Are you using two way comms?

Weedpharma

Weedpharma,
I will use one only way comms.

Thanks guys for your replies!

7

If you are Tx from the Mega and Rx by two Nano's with one way traffic, you only need one Tx and message ID as previously suggested to control two Rx.

Weedpharma