Multiple transmitter single receiver Xbee help

Wireless & IoT
1

Hi Everyone,

I’m currently working on a project that has xbee as one of its requirements. However, I’ve never used xbee before and is having some problems. I was wondering if any of you could help me with some of the xbee settings.

So here’s how my project is supposed to work:

I’ll be using 3 xbee modules(set as transmitters) which are connected to 3 different sensors. Data from this sensor will go through a microcontroller and would then be transmitted using xbee. There’ll be one xbee module(receiver) connected to a microcontroller to a pc to monitor the data from the sensors.

Currently, my xbee settings are as follow:

Transmitter A

-ID 3332

-DH 0

-DL 0

-MY 1

Transmitter B

-ID 3332

-DH 0

-DL 0

-MY 2

Transmitter c

-ID 3332

-DH 0

-DL 0

-MY 3

Receiver

-ID 3332

-DH 0

-DL ffff

-MY 0

But the problem I’m currently having with is that the data from the 2 transmitting xbees are “clashing” at the receiver, causing the data to be distorted. Is there a way to set the xbee so that the receiver xbee polls the transmitted data instead of receiving the data at the same time.

(Receiver polls data from Transmitter A->Transmitter B->Transmitter C-> Transmitter A)

Thank you in advance.

2

Series 1 modules?

Please read up on the very basics of IEEE 802.15.4. You’ll see that it is a CSMA/CA access method system. Listen before transmit. Optional (you choose) use of MAC layer ACKs for error correction. If XBee A cannot hear the transmissions of B, it will on occasion collide. IEEE 802.15.4 says that random-backoff delay and retransmit is done, if ACKs are enabled.

And so on.

Wireless data use is never successful unless you take the time to understand the basics.

You can do a poll protocol yourself, but it shouldn’t be needed.