LowPowerLab Forum

Hardware support => Moteino => Topic started by: Lensdigital on November 26, 2013, 01:43:32 PM

Title: Measuring signal strengh
Post by: Lensdigital on November 26, 2013, 01:43:32 PM
Is there a way to see actual received signal strength of with Moteino w/ RFM12B in current library?  If not are there any other good way to measure it?
I've ran into some issues, where I'm getting a lot of BAD CRCs when sensor put outside, so I want to try different antenna configurations (i.e. Full wave length, but at various angles and shapes like fan, wave, etc.) and it would be very helpful to see instant feedback.
Title: Re: Measuring signal strengh
Post by: Felix on November 26, 2013, 07:53:44 PM
RFM12B does not have RSSI out of the box. You have to do some soldering om a pad on the RFM12b and read that into an analog pin. Some people on jeelabs forums have done that to make spectrum analyzers with RFM12b or other such things:

http://jeelabs.net/projects/cafe/wiki/NRfMon_-_nano_Spectrum_Analyzer_with_the_RFM12B
http://jeelabs.org/2010/06/27/rfm12b-as-spectrum-analyzer/
http://forum.jeelabs.net/comment/6203.html
http://jeelabs.net/boards/7/topics/3204?r=3216
Title: Re: Measuring signal strengh
Post by: Lensdigital on November 26, 2013, 08:39:59 PM
Quote from: Felix on November 26, 2013, 07:53:44 PM
RFM12B does not have RSSI out of the box. You have to do some soldering om a pad on the RFM12b and read that into an analog pin. Some people on jeelabs forums have done that to make spectrum analyzers with RFM12b or other such things:

http://jeelabs.net/projects/cafe/wiki/NRfMon_-_nano_Spectrum_Analyzer_with_the_RFM12B
http://jeelabs.org/2010/06/27/rfm12b-as-spectrum-analyzer/
http://forum.jeelabs.net/comment/6203.html
http://jeelabs.net/boards/7/topics/3204?r=3216
WOW, that spectrum analyzer looks pretty incredible! I'm so doing it!!! Thanks for the links!