AREDN Update, GPS Jamming
If you liked the GL-AR150, the GL-AR300M16 is a better and faster replacement in the same form factor and a similar price point. It, too, has an -EXT version with external antennae, and both are supported by the current AREDN release.
The only downside is that, unlike the GL-AR150, the GL-AR300M16 cannot be upgraded to be powered over Ethernet. The GL-AR750 does have a PoE option.
As I had threatened, I've been posting to my blog about the Drift Buoy development. Here are a series of posts that go into how I generate FSK for HF-APRS, WSPR, and FT8 using the incredible Si5351 clock generator chip: http://wb6cxc.com/?p=107