Author Topic: NOAA Streaming with 3B+ Issues  (Read 380 times)

0 Members and 2 Guests are viewing this topic.

Offline ilovehd

  • Member
  • *
  • Posts: 7
    • Hersey, MI Weather
NOAA Streaming with 3B+ Issues
« on: January 31, 2020, 08:13:16 AM »
Hello all! Hoping you can help me out with a very frustrating issue.

I am streaming 3 NOAA weather stations using 3 separate 3B+ Pi's - 2 of them have been no issue on freqs 162.475 and 162.425mhz. The third has been an absolute nightmare. 162.525mhz just a bunch of static - I can sometimes hear the station faintly

I am using Tim's scrips and all 3 pi's are identical except the freq they are tuned to. If I use my scanner plugged into the same antenna lead I can hear 162.525 perfectly, and if I take the SDR receiver and plug into my laptop using AirSpy it is also crystal clear if I bump the gain up to 30+ no freq shift.

So here is what I have done to try and troubleshoot the issue.

clone working pi then just change the freq - no difference
Used different Nooelec NESDR Mini 2+ SDR's  - no difference
Used different PI's - No difference.
Rebuilt the PI image from scratch - no difference.
Used a usb extension cable between the pi and the SDR - no difference
moved the pi and SDR to a different location - no difference
hard set the gain in  rtl_fm - no change
tried an older version of raspian  - no difference

Here is my command in  /home/pi/weather_radio_scripts/weather-radio.sh

rtl_fm -f 162.525M -s 48000 | play -q -r 48000 -t raw -e s -b 16 -c 1 -V1 -v 4 - sinc 125-3.2k

I'm kind out of ideas at this point.. lol  for now I am streaming that station from my scanner and a PC, but would like to get this working like the rest.

Anyone have an idea?

Thanks!

Tom


Offline USAF_Pride

  • Member
  • *
  • Posts: 10
Re: NOAA Streaming with 3B+ Issues
« Reply #1 on: February 02, 2020, 05:47:32 PM »
have you tried to calibrate the dongle? There is both a rtl_* version or you could use SDRSharp.  The dongle's maybe having some funky issues that you could see with SDR#

Offline ilovehd

  • Member
  • *
  • Posts: 7
    • Hersey, MI Weather
Re: NOAA Streaming with 3B+ Issues
« Reply #2 on: February 02, 2020, 07:37:50 PM »
If I take the SDR receiver and plug into my laptop using AirSpy it is crystal clear if I bump the gain up to 30+ with no freq shift. so not sure what to calibrate. If I use that same gain setting on the pi itís nothing but static
« Last Edit: February 02, 2020, 07:40:58 PM by ilovehd »