The kv4p HT is a DIY VHF radio that enables your smartphone to communicate via voice and text entirely off-grid, requiring at least a Technician class amateur radio license. The KV4PT HT Transceiver is an open-source project that enables licensed amateur radio enthusiasts to use their Android smartphones as handie-talkies (HT). Licensed under GPL3, it allows users to freely adapt and repurpose the project as long as any modified versions are also released as open-source as per GPL3 license.
Simply connect it to your Android device through the USB-C port to turn it into a complete handheld radio transceiver. This project is entirely includes the Android app, ESP32 firmware, PCB designs, and 3D printing files.
Compact enough to carry in your pocket, it’s ideal for a go-bag or to keep in your car’s glove compartment. It has no internal battery, so it’s lightweight and ready to go anywhere.
Note: The kv4p HT is a self-built open-source project with no warranty or guarantee on functionality or reliability. Enjoy building!
- Off-grid capability: 100% ham radio, always completely off-grid
- Audio quality: Crystal-clear 44kHz 8-bit ADC/DAC audio with built-in filters and squelch
- Messaging: Radio-based APRS messaging (not just location) with SMS-style notifications, using a 1200 baud modem
- Memory: Scan through unlimited memory slots and groups
- Battery-free: No internal battery, so nothing to charge except your phone
- Transmission power: 1 watt, covering miles with minimal impact on your phone’s battery
- Accessibility Options:
- Live closed captions (on supported phones)
- Option to turn off animations
- Sticky PTT with haptic feedback
Learn More: https://kv4p.com
Updates –
- Android App is now available at Playstore – Download KV4P
- Software Relase Notes: https://www.kv4p.com/updates.html
