XBee Explicit Transmit Issue

Hi all,

I’m trying to send a unicast message (API frame type 0x11) from a co-coordinator to an end-node, addressing the end-node using its 64 and 16-bit network address.

The problem is that the message is not always transmitted successfully. Instead I’m receiving a 0x24 Address Not Found message.

What’s strange is that the 64 and 16-bit address of the end-node are written correctly and I’ve verified this by observing traffic on the PAN using the Texas Instruments SmartRF Packet Sniffer. Also, the end-node has been connected successfully to the PAN (in fact I receive data from it without any issues).

What could be the cause of this?

The packet I’m sending is this:

As can be seen from the above packet the end-node has IEEE address 00177A010605BADE and network address 2BC5.

I’m using an XBee S2C module with firmware version 0x40 0x5F.

I am looking at the same problem as well. S2C model with latest firmware as of 8 March 2019.

It usually takes 2 retries that returns “Address not found” before it finally succeeds.

I have tried setting 16-bit address to FFFE and also to provide source routing before sending the message. Both doesn’t help.

We have already invested a lot in this and it seems like that more devices added to the network, the worse it gets! I thought more devices makes the network “stronger”?

Can someone kindly advise pls.