Digimesh latency (unicast vs broadcast)

XBee & XBee Gateway XBee - DigiMesh
1

Hi guys,

I made some tests with the following configuration and was surprised to notice that there was significant latency in one particular case.

  • all modules configured in digimesh
  • module “A” configured in AT mode and broadcast
  • modules “B”, “C”, “D” configured in Transparent mode and unicast to “A”
  • module “D” is only visible from “A” through “B” and “C” in the network

When sending data from “A” to (“B”, “C”, “D”) in broadcast mode, there’s no latency.
but when sending data from “D” to “A” in unicast mode, latency is around 5s !!!

Any idea of what’s going wrong?
could that be any other setting?

thanks!

2

Do you observe this latency only in first communication or in all subsequent attempts from D to A ?

3

Hi killer32,

I’ll do some more tests to confirm but I would say this 5s latency is for all attempts.
In case you could see something strange in my setup, here follows the configuration file I use for module D which is common for all modules except for A (where AP is set to 2 instead of 0).

Thanks

XB8_8072.xml

  3FFFFFFF
  0
  7FFF
  3
  4
  A
  0
  0
  7
  1
  11111111
  22222222
  C0
  moduleD
  82
  0
  11
  0
  
  6
  0
  0
  3
  13F
  0
  0
  1
  0
  0
  0
  0
  1
  0
  0
  1
  1
  1
  0
  0
  1
  1
  0
  0
  0
  0
  0
  FFFFF
  FFFFF
  0
  0
  0
  28
  1
  0
  1
  0
  0
  2
  1
  C8
  FA0
  0
  2B
  64
  3E8
  C0000