CC2530: Unknown power consumption when orphan with ZStack-3.0.2

Hi,

What predefined symbols are you using in the project?

What current measurements do you see in each situation:
- before ZED joins
- while ZED is connected to ZC
- when ZED is in orphan mode, before the "unknown event"
- when ZED is in orphan mode, after the "unknown event"

Do you have any further description of the unknown event, and are you able to catch it in a debug session?

Regards,
Toby

Dennis Huang Can you provide those details when you test in CC2530DK?

Hi YK&Toby

    Following list the related current measurements and the capture current warefrom when the unknow event happen. The ZED using "SimpleSwitch-EndDevice" project and did not make any change except some parameter(list in the table "SDK setting").

- before ZED joins ~1.1uA
- while ZED is connected to ZC ~1.1uA
- when ZED is in orphan mode, before the "unknown event" ~1.1uA
- when ZED is in orphan mode, after the "unknown event"~1.1uA

 1. Current warefrom of "Unknow event" (After ZED enter orphan mode within 10 minutes)

2. The test setting and result are list as following.

SDK setting

HDK setting(wiring for this test)

Regards

Dennis

Dennis Huang Thanks for providing these information.

Dennis, thanks for providing more information.

Do you know how often this pulse happens?

If it only happens once within a 10 minute period, then the power consumption shouldn't be too large of a concern.

Regards,
Toby

Toby Pan You will see several wake-up event during 10 minutes and if you keep watching, you should still see this unexpected event. Since this happens on sleeping end device using battery, we do concern about any unexpected power consumption so please help to locate the issue and provide fix. Thanks.

Hi YK,

Can you provide us with proven wake-up debug logs and oscilloscope screenshots where the MCU is actively leaving LPM and servicing a false event flag?  So far the only oscilloscope screenshot provided does not display enough current or voltage to actually power the MCU out of a low-power state.  Hence we can only conclude that this is either noise incurred from the system setup or expected MCU behavior (such as POR or BOD pulses), neither of which are caused by Z-Stack.

Regards,
Ryan

@Ryan, I am pretty sure you can reproduce this issue with CC2530DK and SampleSwitch/SampleLight. You can define HAL_SLEEP_DEBUG_LED but reverse the led3 behavior to turn on during CC2530 wakes up and I believe you will see this issue by checking led3 status by scope.

Hi Toby.

    Thank you for your help. As you mentioned above, We set  SAMPLEAPP_END_DEVICE_REJOIN_DELAY to 3600000 for test and check the "unknown event" time interval. It trig every 8.5 minutes(510 seconds). The document SWRA248"Power Management For The CC2530.pdf" descripte this situation. The longest sleep time is therefore 510 seconds (rounded) and system will wakup by interrupt and update the releated system time tick.  

Thanks

BR

Dennis

Dennis,

Thank you for confirming this on your end.

Regards,
Toby

@Toby We know this trigger every 8.5 minutes(510 seconds) but this is not related to this issue. The wake up events after device goes to orphan is not every 8.5 minutes(510 seconds).  There must be some other event causes this.

Ryan was unable to reproduce this given the same setup; this indicates that the event is unlikely due to the Sleep Timer or Z-Stack.

Can you provide further information?

How do these pulses compare with the pulses when the device wakes up every 510 seconds (perhaps try a trigger on pulse width)?

Do these events happen if the device is in different states?
- before device joins network?
- while device is in network (use long POLL_RATE)?

Please let us know if further support is required.