calculate dBm of rssi value

XBee & XBee Gateway XBee - Point-to-Point/Multi-Point
1

Hello,

i catch the RSSI value on Pin6. Its about 0…255.

Is there a way to calculate the dBm if the power of the transmitter is known?

Thank you

Peter Schwarz
Germany

2

Hi,

G. J. Loubser has compiled a similar project:
http://asasni.cs.up.ac.za/images/d/df/PWM_GJL_vr1.pdf

But I have no idea whence he got the digits for the equations.
Can anybody help?

Thanks,
Peter

3

Hello,
The DB command will return the db value. That would be a lot easier. However, if you’re using an xbee with a 900MH radio, then it’s inaccurate and shouldn’t be trusted.

4

Hi,

thanks a lot for your answer!

I can’t use the DB command, because the change to the AT Command mode and back takes to long. So I would loose to much received data.