CC2530: End device Parent Loss

Aviral Gupta

Expert 1385 points

Part Number: CC2530
Other Parts Discussed in Thread: CC2590

Setup:

ZStack : v3.0.2

Coordinator : 1 ( ZNP coordinator )

Router : 1

EndDevice : 9

Also we are using third party module (CC2530 + PA/LNA) on our PCB for end device.
We have been using the modules without any issue for our earlier application. (Zstack2)

PA/LNA:

Router / End Device:

CC2530 ----- CC2591
P1_1 ------------ PA_EN
P1_4 ------------ EN
P0_7 ------------ HGM

Coordinator:
   CC2530 ----- RFX2401
               P1_1 ------------ TX_EN
               P1_4 ------------ RX_EN
              *Coordinator is connected to an external antenna as well.

Application Points:

For End device in f8wConfig.cfg :
-DPOLL_RATE=0
The device is configured to send heartbeat messages, so it wakes up periodically to send heartbeat report and also polls the parent for new data.
Coordinator : HAL_PA_LNA_CC2590 defined in hal_board_cfg.h
Router : HAL_PA_LNA defined in project predefined symbols

Observation:

We consider every new device as network rejoin in this case.(We have implemented a boot counter that increments on each reboot. And since the boot count did not change, we know that the new device is not due to reboot.)

End Devices far from the coordinator loses sync with parent

Device No. As on Map	IEEE Address	Parent Loss count			LQI
Device No. As on Map	IEEE Address	00:00 - 5:30 Hr	5:30 - 15:19 Hr	total	Through Router	Direct Coordinator
1	0x00124B001A1D736B	7	84	91	60-85	0
2	0x00124B001A1D7377	3	40	43	60-85	0-30
3	0x00124B001A1D6BD2	2	14	16	-	30-60
4	0x00124B000E0C4E41	1	0	1	-	72-90
5	0x00124B001A1D7308	0	10	10	-	30-60
6	0x00124B000E0C3903	1	44	45	60-85	0-25
7	0x00124B001A1D7312	1	44	45	60-85	0-30
8	0x00124B001A1D4AE6	0	8	8	-	20-50
9	0x00124B001A1D7F82	2	19	21	-	5-40

End Device 1 : frequent ~ (1-10min )
End Device 9 : random ~ (4-80min)
Even though the positioning of all devices is fixed and they are all powered the whole time, End Devices associated with a different parent each time they rejoined network.
This occurs even if the LQI through the coordinator is lower than the LQI through the router.
End Device 1,6

What is causing this parent loss?

Sniffer Logs

Sniffer was placed near the coordinator.

Key : "0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F"

6724.enddevice_2019_11_19_5_49.psd

WireShark Logs:

Enddevice_2018_11_19_5_59_PM_WireShark.zip

over 6 years ago

0 YiKai Chen over 6 years ago

Guru 735695 points

For Coordinator : HAL_PA_LNA_CC2590 defined in hal_board_cfg.h --> I think you should define HAL_PA_LNA instead of HAL_PA_LNA_CC2590.

0 Ryan Brown1 over 6 years ago in reply to YiKai Chen

TI__Guru**** 220547 points

I agree with YK that the incorrect macro is being used, also do you attempt to increase the TX power setting of either application?

Regards,
Ryan

0 Aviral Gupta over 6 years ago in reply to YiKai Chen

Expert 1385 points

Hi YK Chen,
I had made the change in coordinator from HAL_PA_LNA_CC2590 to HAL_PA_LNA
But still the problem of end devices loosing parent persists.
Here is the sniffer log of test done with this change.

enddevice_2019_11_21_13_20.psd

0 Aviral Gupta over 6 years ago in reply to Ryan Brown1

Expert 1385 points

Hi Ryan,

We have set the Tx power of the coordinator to the maximum.
End device run on the default Tx power.

0 Ryan Brown1 over 6 years ago in reply to Aviral Gupta

TI__Guru**** 220547 points

Hi Aviral,

Increase the default TX power of the end devices or try evaluating the ZC with a TI PA EVM (to confirm whether the RFX2401 configuration is an issue).

Regards,
Ryan

0 YiKai Chen over 6 years ago in reply to Aviral Gupta

Guru 735695 points

What is the max TX power you use on coordinator and how do you set it?

0 Aviral Gupta over 6 years ago in reply to YiKai Chen

Expert 1385 points

We set the Tx power to '20' on the coordinator using SYS_SET_TX_POWER command.

0 YiKai Chen over 6 years ago in reply to Aviral Gupta

Guru 735695 points

I suspect your device might meet TX saturation when you use 20 dbm. I would suggest you to set all of your coordinator, routers, and end devices to 16 dbm to test again.

0 Aviral Gupta over 6 years ago in reply to YiKai Chen

Expert 1385 points

What is the default Tx power for End Device and Router?

0 YiKai Chen over 6 years ago in reply to Aviral Gupta

Guru 735695 points

If you define HAL_PA_LNA, the TX power is set as 20 dbm as default.

0 Aviral Gupta over 6 years ago in reply to YiKai Chen

Expert 1385 points

What does it mean by TX saturation?

I have tested the tx power setting on one End Device.
Results are as follows:

Tx Power	LQI
Default	88-96
20	106-117
16	96-104
10	80-88

Shouldn't I set Tx Power to '20' for better results as it gives better LQI?

0 YiKai Chen over 6 years ago in reply to Aviral Gupta

Guru 735695 points

Saturation is like that you turn the volume of your audio amplifier to max volume and you might hear the audio is broken in speaker. So, I suggest you to set TX power to a lower value to avoid possible saturation.

0 Ryan Brown1 over 6 years ago in reply to YiKai Chen

TI__Guru**** 220547 points

Aviral,

Are there any updates or can this thread be closed?

Regards,
Ryan

0 Aviral Gupta over 6 years ago in reply to Ryan Brown1

Expert 1385 points

What happens when the end device does not receive the response for the data request?
Does end device retry data request or data request is done on the next scheduled time?
If data request is retried on failure, at what frequency?

I have also run test on the same setup over night twice.
There were no parent losses at night.(approximately Midnight to 8AM).
However there were very few packet losses (less than 1%) .

0 YiKai Chen over 6 years ago in reply to Aviral Gupta

Guru 735695 points

When there’s no ack to data request, device will try. If I remember correctly, it will retry 3 times.

0 Aviral Gupta over 6 years ago in reply to Aviral Gupta

Expert 1385 points

As described in the question, parent loss issue still persists during the day.

0 YiKai Chen over 6 years ago in reply to Aviral Gupta

Guru 735695 points

Sometimes, ZED might lose connection to its parent because of interference. If it can rejoin, I see no issue on this topic.

Zigbee & Thread

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CC2530: End device Parent Loss

Setup:

PA/LNA:

Application Points:

Observation:

Sniffer Logs