Turn your Android phone into a ham radio transceiver

# kv4p HT - Turn your Android smartphone into a modern ham radio transceiver Source: [https://www.kv4p.com/](https://www.kv4p.com/)  Turn your Android phone into a modern ham radio transceiver Open source hardware & software for makers and tinkerers, 1 watt VHF or UHF [View on GitHub](https://github.com/VanceVagell/kv4p-ht)[Join Discord](https://discord.gg/Ev9R9uFeCq) **Note:**kv4p HT is an open source project you build yourself\. It has absolutely no warranty, or guarantees on functionality or reliability\! Requires at least a Technician class amateur radio license to use\. That said, have fun\. :\) ### Inexpensive Build Just a few components to solder, buy the parts yourself or get a kit\. ### Android Powered Leverages your phone's screen, GPS, and battery\. No separate charging needed\. ### Full\-Featured APRS Built\-in 1200 baud modem for SMS\-like text messaging*plus*position beaconing, unlike most radios that only offer beaconing\. ### Fully Open Source GPL3 licensed: Android app, ESP32 firmware, PCB designs, and 3D printer files\. ### No Internal Battery Sips power from your phone\. Perfect for go\-bags or glove compartments\. ### Accessible Design Live closed captions, sticky PTT with haptic feedback, and animation controls\. 1 ### Get the Parts Order a convenient kit with everything you need, or source components yourself\. #### Building from scratch? - Custom PCB from[GitHub designs v2\.0e](https://github.com/VanceVagell/kv4p-ht/tree/main/pcb/v2.0e)\(order from PCBWay/JLCPCB\) - SA818\-V or SA818\-U radio module \(or DRA818V/U can be used\) - SMA male antenna of your choice, such as[pocket\-size](https://a.co/d/7bbVemg)or[1/4 wave Signal Stick](https://signalstuff.com/products/st-sma-m/?band=2m70cm-dual-band) - USB C cable or U\-shaped adapter \([recommended option](https://www.amazon.com/dp/B0FLDMQRZN)for 2\.0x radios\) - [Sticky gel pads](https://www.amazon.com/dp/B07PFW5SXB)to mount to your phone 2 ### Solder the Board - Solder the radio module and any through\-hole components to your PCB - Trim the SMA connector legs flush so they won't contact your phone - If you bought a kit, this may already be done for you 4 ### Assemble - Snap the PCB into the 3D printed case - Cut a thin strip from the sticky gel pad to attach kv4p HT to your phone - Screw on the antenna 5 ### Flash Firmware and NVS If you bought a kit, the vendor likely already did this step\. Otherwise, you'll need to flash the ESP32: 6 ### Install the App Requires Android 8\+ \(2017 or newer\)\.