40 points | by alexktz 2 hours ago ago
10 comments
Looks pretty cool, though kinda "cheating" by pulling from adsb.fi - though I think you'd need something a lot more powerful than an ESP32 to receive and decode ADS-B ;)
I would actually expect the math to decode ads-b traffic is substantially less complex than, for example, a TLS connection.
It is trivial to decode, but don’t forget that tls is extensively optimised on most networking stacks.
Using ADS-B and calling it a "radar" feels wrong to me.
(But is is a cool project)
Agreed, and even SSR always felt like cheating imo. I wanna see someone build a primary radar on an esp 32.
Actually possible to receive and decode ADS-B on ESP32, but MLAT is failing (tried hard but not found a trick yet).
Biggest problem isn’t that it’s not powerful enough, but the USB port bandwidth don’t match most SDR.
Using some clever tricks you can receive parts of the message on a slower USB and be able to decode ADS-B
Why do you need to send the samples over USB?
You could fit a pi zero and rtl in an enclosure not much larger than the one they’ve printed.
Well, a radar-like display, then. But not a radar.
radar *display*
making esp32-based radar emitter would've been cool, tho
Looks pretty cool, though kinda "cheating" by pulling from adsb.fi - though I think you'd need something a lot more powerful than an ESP32 to receive and decode ADS-B ;)
I would actually expect the math to decode ads-b traffic is substantially less complex than, for example, a TLS connection.
It is trivial to decode, but don’t forget that tls is extensively optimised on most networking stacks.
Using ADS-B and calling it a "radar" feels wrong to me.
(But is is a cool project)
Agreed, and even SSR always felt like cheating imo. I wanna see someone build a primary radar on an esp 32.
Actually possible to receive and decode ADS-B on ESP32, but MLAT is failing (tried hard but not found a trick yet).
Biggest problem isn’t that it’s not powerful enough, but the USB port bandwidth don’t match most SDR.
Using some clever tricks you can receive parts of the message on a slower USB and be able to decode ADS-B
Why do you need to send the samples over USB?
You could fit a pi zero and rtl in an enclosure not much larger than the one they’ve printed.
Well, a radar-like display, then. But not a radar.
radar *display*
making esp32-based radar emitter would've been cool, tho