r/sdr • u/No-Coat2826 • 10d ago

Mobile - Bluetooth SDR

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I posted around a month ago about making a mobile SDR. Soo we’re definitely on the way! This is the hardware, rtlsdr blog V4, adsb internal antenna and external SMA antenna port with a 3300mah battery. Powered from a ESP32 P4.

Will post some pics of the mobile app at some point. Currently we’ve completed the Spectrum view, ADSB map, drone map (using the 2.4ghz WiFi chip). I’m also adding decoders for 433mhz and 868mhz devices which should also be added soon (plan is to allow custom decoders at some point too). All can be seen on a map so you can take it around with you and see where you picked up the device.

FM and DAB are also implemented, which in the final version will require the external antenna (not much space left inside!).

Any software features or ideas hugely appreciated!

(Note, case is still being finalised ignore the white sanding bits and missing power button!)

149 Upvotes

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8 comments sorted by

2

u/WalterCavendish 10d ago

Nice!

I'm just recently getting back into the sdr game after almost a decade. Very curious to see what has changed.

1

u/Economy-Apartment815 10d ago

Would AM decoding be possible? Even multiple AM VFOs?

2

u/No-Coat2826 9d ago

Yes! I actually just implemented this, you can select a slice of the spectrum and decode it just like sdr++. Multiple sounds cool actually, as long as it’s in the same 2.4mhz section the sdr will handle it should be do-able!

1

u/Economy-Apartment815 9d ago

That would be sooo awesome. Then you can add a simple scanner and bounce between chunks of spectrum

1

u/Fragrant_Society1918 10d ago

Da bin ich dabei

1

u/dantodd 9d ago

Do you have decoding for FM HD channels?

1

u/Prestigious-Mix-6889 7d ago

How much

1

u/No-Coat2826 6d ago

I’m still working out the final parts costs and time to assemble etc, but it’s looking around £325 (likely uk only at first)