Zigbee Receiver Issue with Multiple Transmitting Devices

[ANCHAL]

I am currently working on a Zigbee-based system operating at 2.4 GHz using the XB3-24DMST Zigbee module, where 20 devices are transmitting 16-byte data packets to a single Zigbee receiver module. For the antenna, I am using the 2.4GHz 3.2dBi RP-SMA Male Omni Antenna for WiFi.

I am facing the following issue:

• When up to 8 devices transmit data, the receiver works properly.

• When the number of transmitting devices increases from 9 to 15, the receiver sometimes stops receiving data for a few seconds and then suddenly receives all buffered data.

• When the number of devices exceeds 15, the receiver stops receiving data completely.

I have also attached the receiver configuration image for your reference.

Could you please help me understand whether this issue is related to network capacity, receiver configuration, antenna selection, or any other limitation in the setup?

[tom_l]

Zigbee is a bidirectional mesh network not point to point. It is also easy to flood. How much data is each device sending and how often?

The datasheet for that device does not list the number of child devices it supports. You probably need a better coordinator device and probably some repeater devices too.