How to get rssi value?

Dhanraj

Guru 14820 points

Other Parts Discussed in Thread: CC2530, CC2531, Z-STACK

Hi,

I am using z-stack home with cc2530 chip.and cc2531 with BBB as coordinator.

i have one router (i.e. cc2530) and one coordinator(i.e. cc2531) in the network.

i want to get the RSSI value when i send a command from z-stack HA Linux getway to the router(cc2530).

How can i get the RSSI value in z-stack side?

over 9 years ago

0 Igor Sherer over 9 years ago

Guru 31280 points

You are sending a message from end device to router, then you want to get the RSSI value of the received packet?
If so, the RSSI is stored in the packet, as rssi field.

0 Dhanraj over 9 years ago in reply to Igor Sherer

Guru 14820 points

There is only one router and one coordinator in the network ,there is no end device in the network.
m sending commands from HA linux getway to the router and and i want to read and print the value in z-stack home.

0 YiKai Chen over 9 years ago in reply to Dhanraj

Guru 735685 points

You can try to get it in afBuildMSGIncoming function.

0 Dhanraj over 9 years ago in reply to YiKai Chen

Guru 14820 points

M trying to catch value from MSGpkt-> rssi in the function which you have mentioned.. M getting some value ...l want to know that is it final rssi value or I need to do some operation in it?

0 YiKai Chen over 9 years ago in reply to Dhanraj

Guru 735685 points

You should catch MSGpkt->LinkQuality and convert it to RSSI if you need it.

0 Dhanraj over 9 years ago in reply to Dhanraj

Guru 14820 points

thanks a lot!

0 YiKai Chen over 9 years ago in reply to Dhanraj

Guru 735685 points

You are welcome.

0 Dhanraj over 9 years ago in reply to YiKai Chen

Guru 14820 points

how to covert MSGpkt->LinkQuality into RSSI?

0 YiKai Chen over 9 years ago in reply to Dhanraj

Guru 735685 points

the following formula to convert RSSI and LQI.

LinkQuality = [255* (RSSI-MIN_ED)]/[MAX_ED-MIN_ED]

Therefore with simple algebra
RSSI = MIN_ED+LinkQuality*( MAX_ED-MIN_ED)/255

Default values for MIN_ED and MAX_ED are -87 and 10 respectively.

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How to get rssi value?