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OTA = over the air. ie online updates you’d expect of a more polished product
But the browser is involved. Can the browser do OTA to esp32?
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Agreed, and even SSR always felt like cheating imo. I wanna see someone build a primary radar on an esp 32.
Gotta admit that's what I clicked through hoping for. I've seen a few projects that use SDR to detect doppler shifts of reflections of broadcast FM radio station off planes as "passive radar". But that doesn't get much in the way of direction info, just approach velocity. I've pondered building something that uses that and correlates it with an ADS-B receiver, to see it it can detect aircraft that are not transmittin…
Actually, I know it's possible, that's how the automotive radars (used for adaptive cruise control) work. The real question is if someone can get enough range to pick up aircraft.
These kind of project are now so easy. A few prompts and you have something like this. I did it with quite a few similar like projects. You can buy super cheap esps with integrated lcds for less than 20 dollars.
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 ;)
Using ADS-B and calling it a "radar" feels wrong to me. (But is is a cool project)
- https://makerworld.com/models/2872376-esp32-plane-radar-live... (referenced by the linked article)
- https://github.com/AnthonySturdy/micro-radar
- https://www.gadgies.co.uk/shop/p/product-3-szb2y-gzh2r-tzhkx...
Personally, I really like them. It's a nice gadget. :)
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TLS is supported in hardware, so it takes no more processing power than moving the data around without encryption. In the US, ADS-B in uses 1.3 MHz of bandwidth, which would require 2.6 Msps. The ESP32-C3 running at 160 Mhz would have ~70 instructions per sample to process the data. That's probably doable, but the ESP32-C3 is one of the less capable variations of the line, and there are dual-core versions running at…
GPS is over 1 GHz, but I don't think you need to have a microcontroller running that fast to decode it?
ADS-B baseband is also around 1GHz, what they mean is once you down convert in the process of demodulating the signal you will get a signal that has bandwidth of 1.3MHz.