Iam Getting a constant delay of 6sec after my XBee is connected to mission planner

XBee & XBee Gateway
,
1

Hello,

Iam using XBee SX 868 for communicating between my drone and transmitter.
I Have coordinator connected to laptop and router connected to my drone.
i got the communication 6sec delay.
when i change mode stability to Alt hold to Land i got 6sec delay
When i give Throtle i get 6 sec delay.
Can you say ASAP why it is happening and how to rectify it. Do i need to change any values in Xctu or something else.
Baurd rate 57600.

Thanking you,
Bindhu

2

I would suggest setting the DL and DH values of both radios to match the SL and Sh of the other. I would also suggest setting the TO command to 0x40.

3

Hello Sir,
Thanks for the response,
But i have gave all those parameters before itself.
Even after i gave these parameters the delay is showing 6sec.
Thankyou,
bindhu.

4

What is the CM you are using?

5

Hello sir,
CM is channel mask i kept it default. The CM Iam using is 3EFFFDFF
My BR RF_Data rate is 80kbps[1]
Thank you,
Bindu.

6

What I would suggest is removing the radios from the device and running a range test. Do you see the same delay from the radios when doing the range test? If not, then it is not the radios causing it.

7

Hello sir,
As you suggested i had tested the devices. i observed the same delay.

                    Coordinator           Router

BD Baud Rate 57600[6] 57600 [6]
D2 DIO2/AD2 Digital Input [3] Digital Out, Low [4]
D6 DIO6/RTS Disable [0] RTS flow control [1]
D7 DIO7/CTS Digital Input [3] CTS flow control [1]
IR Sample Rate 2000 0
P2 DIO12 Disable [0] Digital Out, Low [4]
IC DIO Change Detect 4 8
TO Transmit Options 40 40

can you suggest me which parameter gives delay.

8

What is the SP, SM, ST and SO vales set to?

9

Hello sir,
I apologize for late reply. I never changes these parameters these are the values in both coordinator and router
sp-sleep time 190
sm-sleep mode normal(0)
st-wake time 1F40
so-sleep options 2
My question is is there any parameters that initiate’s delay in the module
Thankyou
Bindu.

10

I am not seeing anything on the radio that would cause it. I would suggest removing the radios out of the picture and run a wire between the two and see if you have the same delay or not.