No response from TX Request

XBee & XBee Gateway XBee - DigiMesh
1

I’m running a pair of DigiMesh 2.4 nodes, a Pro on a uC in coordinator mode and a standard XBee on a USB port connected to CoolTerm terminal emulator. I’m not using any other software. Both nodes are in API mode and the firmware version is 10CD. I can successfully send any Remote AT command to the Pro and get a response back. But I never get a response to a TX Request.

The TX request I send is:

7e 00 12 10 22 00 13 A2 00 40 69 77 06 ff fe 00 00 41 42 43 44 eb

If I send the Remote AT command SL to fetch the low bytes of the Pro serial number I get the correct value. Specifically, I send:

7e 00 0f 17 01 00 13 A2 00 40 69 77 06 ff fe 00 53 4c 70

and get a correct response. I’ve run everything thru John Foster’s packet-check program.

What am I doing wrong? Should I in fact get a TX Response packet automatically from the XBee?

-Russ

2

Russ, could it be byte offset 16 is set to 0x00 which with bit 0 set to 0 disables ACK ?

  • Martin
3

@russkuhn

If your firmware version is 10cd then your modems are configured for 802.15.4, not Digimesh. Could that explain the problem?

(Packet type 0x10 is not valid for 802.15.4.)

4

johnf, that is exactly what my problem was. Although I had received Digimesh modems, they had 802.15.4 firmware installed. I had to contact Digi tech support to diagnose why I could not load the Digimesh software. Once that happened, my tests worked perfectly. Thank you.

5

Glad it helped!

And here’s a tip - having noted that you ran the packets through packet-check (hey, a user! Yay!) - had you seen in the file comments that you can customize packet-check to assume Digimesh packets every time you run it? The benefit is that you get comments and error messages that are more focussed.