[HN Gopher] Decoding radio-controlled bus stop displays (2013)
       ___________________________________________________________________
        
       Decoding radio-controlled bus stop displays (2013)
        
       Author : zdw
       Score  : 41 points
       Date   : 2022-02-14 19:17 UTC (3 hours ago)
        
 (HTM) web link (www.windytan.com)
 (TXT) w3m dump (www.windytan.com)
        
       | kfarr wrote:
       | Somewhat related, SFMTA Muni is retiring its current bus stop
       | displays because of AT&T 3G decommissioning. Probably not worth
       | the effort, but presumably sufficiently motivated people could
       | spoof legacy 3G and feed it any data they wish.
       | 
       | https://www.masstransitmag.com/technology/passenger-info/sig...
        
       | dang wrote:
       | One tiny past discussion:
       | 
       |  _Decoding radio-controlled bus stop displays_ -
       | https://news.ycombinator.com/item?id=6789485 - Nov 2013 (3
       | comments)
        
       | dest wrote:
       | There has been a very nice CCC talk on this topic... but I don't
       | have the link :/
        
       | krallja wrote:
       | There is so much free information out on the airwaves, if you
       | only had the protocol docs available. In addition to the usual
       | pseudo-voyeur stuff (police/fire/EMS/Burger King drive-thru
       | radios), I've seen people downloading telemetry data from space
       | probes, decoding GPS, tracking airplanes with ADS-B, and of
       | course, bus timetables.
        
         | RicoElectrico wrote:
         | Wouldn't that be ecouteur rather than voyeur? ;)
        
         | contingencies wrote:
         | Don't forget wifi, bluetooth, vehicle radios, toys, wireless
         | doors, alarms, lights and sprinklers, agricultural and fleet
         | telemetry, AIS...
        
         | squarefoot wrote:
         | Yup, there's a huge number of protocols used for radio, too bad
         | powerful software like Code300-32 still cost an eye. Tech specs
         | are impressive, but still EUR4500 for the cheapest version.
         | http://www.hoka.net/pdf/code300-32_spec.pdf
         | 
         | There are some FOSS demodulators out there, but unfortunately
         | the number of protocols they support is way smaller. SigDigger
         | however seems promising, although still in early stage of
         | development. https://batchdrake.github.io/SigDigger/
         | 
         | > people downloading telemetry data from space probes
         | 
         | Monitoring JWST transmissions, if doable, might be the next
         | milestone for Ham Radio.
        
           | RF_Savage wrote:
           | Already done by multipke people at the level of seeing the
           | carrier. No data decoded as that needs much larger dishes.
           | People have also been able to receive the carrier of various
           | space probes orbiting Mars.
        
       ___________________________________________________________________
       (page generated 2022-02-14 23:00 UTC)