I remember the Ettus devices to be much much much more powerful.

The modems could be quite interesting as they are connected via PCIe which can eat a lot of bandwidth.

But they are very difficult (to almost impossible) to find if there isn't anything left in the firmware blob or device driver.

With the new ESP32-S31 we most likely can extract the I/Q data over its new 1 GBit/s interface. Guessing something around 20-40MSPS should work.

These hack will most likely will be a revolution for 13cm ham radio. With the new 5GHz ESP32 modules most likely also for 5cm. As all Espressif components are WiFi-qualified we can expect a very very stable and robust radio.

I ordered a few and waiting for Ali to deliver them to my lab.

It's so pure.

But without an adjustment to their salaries.

Lol.

Comments URL: https://news.ycombinator.com/item?id=49893735

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Osmand and GMaps are working fine.

Waze is almost melting the poor thing. Beside of that working fine.

This way you can - for example - track water height of a river next to a station. You basically receive the direct GNSS signal and the reflected one. Then do magic math.

Due to the low orbit of the GPS/Galileo/etc. satellites the reflection is basically "scanning" over the area of interest with an ultra precise signal.

It doesn't require super-cooled radio stuff and can be done with off-the-shelf-gear.

Reminds me that scientists can use GPS to track earthquakes indirectly as it is interacting with the ionosphere: https://link.springer.com/article/10.1186/s40623-025-02211-y

But having a small, low-power, lightweight messenger that uses an extremely robust (and thereby slow) mode to send and receive messages is an interesting niche. For VHF/UHF/SHF you can use LoRa.

Encryption (in terms of hiding messages) is forbidden mostly.

But everything else is allowed: hashes, signing, etc.

Even the legislators really understand it. They are allowing encryption for remote controlling ham satellites. With proper signing even that would not be necessary (with only exception of key rotations maybe).

AFAIR the EEPROM mostly uses the VideoCore instruction set.