RTOS/CC2650: Problem with reading RSSI Value in CC2650 in TIRTOS

Shruti Goradia

Part Number: CC2650

Tool/software: TI-RTOS

Hi I am using sample temperature sensor example from ti-simplelink to send the sensor data(of 5 sensors) through the zigbee to the co-ordinator.

My requirement is to measure the RSSI Value and all the sensor value every 10s. I recieve all the sensor values but the RSSI value does not get updated.

I noticed that the once a data frame is send after the network formation the code never goes to the function static void TempSensor_processAfIncomingMsgInd( zstack_afIncomingMsgInd_t *pInMsg) where the RSSI is measured.

Kindly help me on how to measure RSSI value every 10 seconds.

Thanks,

Shruti

over 9 years ago

0 YiKai Chen over 9 years ago

Guru 735695 points

Try to use lqi in zstack_afIncomingMsgInd_t to convert to RSSI.

0 Shruti Goradia over 9 years ago in reply to YiKai Chen

Prodigy 170 points

thanks for reply.

but the code never enters the function TempSensor_processAfIncomingMsgInd after the first data frame is sent. Till that time i am getting the RSSI values. If it will not enter the function, how will i get the lqi as lqi is also measured in the same function. Is there any alternative function to measure LQI continuously every 10 seconds?

0 YiKai Chen over 9 years ago in reply to Shruti Goradia

Guru 735695 points

If there's no AF message send to sensor node, this function won't be called. You have to send some AF message to update LQI/RSSI.

0 Shruti Goradia over 9 years ago in reply to YiKai Chen

Prodigy 170 points

Thanks Yikai Chen. This answers my questions.

I have one more query. When can i use macGetCurrRssi( void ) api and how can it be used? any example for the same?

Thanks,

Shruti

0 YiKai Chen over 9 years ago in reply to Shruti Goradia

Guru 735695 points

As I know, you cannot call macGetCurrRssi from application.

0 Shruti Goradia over 9 years ago in reply to YiKai Chen

Prodigy 170 points

Hi YiKai Chen,

What do you suggest, if i have n number of end device and one co-ordinator, RSSI value should be measured at end device side or coordinator side?

Thanks,

Shruti

0 YiKai Chen over 9 years ago in reply to Shruti Goradia

Guru 735695 points

It depends on your application. If you want to know signal strength sent from each ZED, you can measure RSSI on ZC. In contrast, you can measure it on ZED.

Zigbee & Thread

Zigbee & Thread forum

RTOS/CC2650: Problem with reading RSSI Value in CC2650 in TIRTOS