How to avoid the delay between consecutive AT mode instances in XBee S6B

XBee & XBee Gateway XBee Programamble (S2C & 900 HP)
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1

Hi, I am sending text string from a PC connected to one S6B module to other two different receiving S6B modules, A and B, one after each other.
In order to sequentially switch IP destination address in the module connected to the PC, I send this:

  1. “+++”
  2. ATDLipaddress of the receiver A
  3. “ATCN”
  4. “Message for the receiver A”
  5. Pause(2 seconds)
  6. “+++”
  7. ATDLipaddress of the receiver B
  8. “ATCN”
  9. “Message for the receiver B”
    … and so on…

I noticed that if I don’t wait 2 seconds -point 5)- the second “+++” sequence is sent as a message to the receiver A instead of an AT command for the transmitter module. Is there any reason why this happen? I want to remove this wait because it really slows the overall system. I looked for explanation in the manual but I couldn’t find anything. Any ideas? I don’t know which other info you might need for answering my question, but I’d be more than happy to give you more details.

2

The time delay you are referring to is the Guard Time. While you are not able to eliminate it, you can reduce it to a few mS. Just remember that you need to have the GT value set to no less than it takes to send the +++ within the GT time frame at the given baud rate. At 9600 baud, you could theoretically set the GT to 3mS.