RTOS/CC2530: Z stack indirect messages timeout and indirect messages queue

Konstantin Nikonov

Part Number: CC2530

Tool/software: TI-RTOS

I use СС2530 as a router and coordinator.

I use Z-Stack Home 1.2.2.

1. I'm sending a indirect message to ZED. If the ZED is power off or out of range, I will not receive a response from the ZED.

How can I understand that there was no response ? Is there any event if there is a indirect messages timeout?

2. If I send several messages, they are queued.

How can I find out how many messages are in the queue at the moment (in the buffer)?

over 6 years ago

0 JasonB over 6 years ago

TI__Expert 8950 points

1. If you are sending an indirect message to a ZED (i.e. a non-immediate TX message), the ZED must MAC data poll it's parent before it is able to receive this message. If the ZED does not poll it's parent before NWK_INDIRECT_MSG_TIMEOUT seconds (7 by default in f8wConfig.cfg), the message will be expired from the NWK buffer on the parent device. If a message is expired, you will receive a ZStatus_t return value of ZMacTransactionExpired on the sender.

2. nwkDB_CountIndirectHold() from nwk_bufs.h will return how many indirect messages are currently queued.

0 YiKai Chen over 6 years ago

Guru 735455 points

I suggest you to enable APS ack when sending message. If there’s no APS ack, it means message isn’t delivered to device.

0 Konstantin Nikonov over 6 years ago in reply to JasonB

Intellectual 350 points

Thanks you for answers !!!

1. OK. I increased NWK_INDIRECT_MSG_TIMEOUT to 30 seconds.

I'm sending a request to ZED.

If after 30 seconds the ZED is not polled the coordinator, there must be some event in which I can learn ZStatus_t. What event should happen? How can I find out what ZStatus_t = ZMacTransactionExpired?

2. Is there a function that returns how many messages are queued for a particular ZED, for example with a short address of 0x5431?

0 YiKai Chen over 6 years ago in reply to Konstantin Nikonov

Guru 735455 points

As I know, there’s no such specific functions for both item 1 and 2.

0 Konstantin Nikonov over 6 years ago in reply to YiKai Chen

Intellectual 350 points

How can I determine if the ZED is power off or out of range?
Can you provide a sample code?

0 YiKai Chen over 6 years ago in reply to Konstantin Nikonov

Guru 735455 points

You can send an active endpoint request periodically. If there’s no response, it means device is off or out of radio coverage.

0 Konstantin Nikonov over 6 years ago in reply to YiKai Chen

Intellectual 350 points

Ok. How to determine that there was no response from the ZED?

0 YiKai Chen over 6 years ago in reply to Konstantin Nikonov

Guru 735455 points

If you cannot get active endpoint response, it means device is off or out of radio coverage. Another alternative is to let device to send supervision signal periodically. If there’s no supervision received for a while, it means device is off or out of radio coverage.

0 Konstantin Nikonov over 6 years ago in reply to YiKai Chen

Intellectual 350 points

If there was no response from the device, will there be an event on the z stack? Or should I decide by myself in application that there was no answer? For example, run a timer?

0 YiKai Chen over 6 years ago in reply to Konstantin Nikonov

Guru 735455 points

You should decide by yourself and do it in your application with a timer.

0 Konstantin Nikonov over 6 years ago in reply to YiKai Chen

Intellectual 350 points

Thank you

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RTOS/CC2530: Z stack indirect messages timeout and indirect messages queue