433MHz RF Module

Projects Networking, Protocols, and Devices
1

Hi,

Im not sure if im posting in the right section.

My concern
Is there any way to guard the frequency from interference to other/same frequency on other device?

If none
Any other alternative to use any wireless communication for short distance?

Thanks

2

Are both transmitting at the same time? Then no. You need to ensure only one transmits at a time.

If there is one master transmitting and several slaves listening, there is no problem.

3

Any other alternative to use any wireless communication for short distance?

IR (infrared) emitters and detectors work fine at short range.

4

Depends what you mean by interference. What problems are you having?

5

Only 1 pair is communicating. What I mean is, what if there is another device with or close enough to that frequency? For my case 433Mhz. Will that interfere with the communication with my device? If yes, how can I prevent it.

I can't use ir, it can't be mount with LOS

6

Will that interfere with the communication with my device?

Yes, if two transmitters operate on the same frequency, at the same time.

7

rehpej:
Only 1 pair is communicating. What I mean is, what if there is another device with or close enough to that frequency? For my case 433Mhz. Will that interfere with the communication with my device? If yes, how can I prevent it.

I can't use ir, it can't be mount with LOS

Basically there are two types of interference that may affect your reception. First is desensitizing your receiver by a strong signal close in frequency to the one you want to receive. The second is corruption of the data you are trying to receive. The first can be minimized by using directional antennas and perhaps filters on the lead to the antenna to trap the offending signal.

The second is more difficult and may require error detection code and retransmission of the message.

the ultimate way to minimize the interference is to shoot the interfering device.

Paul

8

Hmm. The filters may be add in the data pin of the module? Or in the arduino?

9

No.

10

rehpej:
Hmm. The filters may be add in the data pin of the module? Or in the arduino?

filters between the antenna and the receiver.

Paul

11

rehpej:
Any other alternative to use any wireless communication for short distance?

Bluetooth

12

@paul
thanks ill try to research filters to use

@intp
can do i have to use 2 bt module (hc05)? dont know how the setup.
1 bt module from the buttons, another on the arduino?