kv4p HT step-by-step build instructions - turn your phone into a modern ham radio

Turn your Android phone into a modern ham radio transceiver. In under an hour, build a 100% open source kv4p HT for less than $35 of parts. Follow along with the written guide here, and find links to necessary software, 3D prints, and PCB designs:

https://kv4p.com/quick_start.html

This video is the companion to those instructions, and shows every step of the build and test process.

00:00 Soldering the PCB
10:28 Flashing the firmware
12:30 Android app install
15:21 Testing rx and tx
15:39 Receiving text chat

kv4p HT is a homebrew VHF radio that makes your phone capable of voice and text communication completely off-grid with at least a Technician class amateur radio license.

The radio simply plugs into the USB C port on your Android smartphone and transforms it into a fully-fledged handheld radio transceiver. It's completely open source (GPL3): the Android app, ESP32 firmware, PCB designs, and 3D printer files.

It's small enough to fit in your pocket and take anywhere, and since it has no internal battery it's the perfect emergency radio to put in a go-bag or your car's glove compartment.