+ urchin.guru
Features Hardware Build
Android SDR Recon

Urchin tracks TPMS traffic, not Bluetooth.

Urchin is a local-first Android app for capturing TPMS observations from rtl_433. It supports RTL-SDR, HackRF One, and network-fed rtl_433 JSON, then keeps the sightings, raw payloads, and sensor history on-device.

Download Debug APK CLI Build Steps

Features

  • TPMS protocol parsing with vendor lookup hints
  • Live, starred, and battery-low filters
  • Signal-sorted history and raw JSON export
  • Diagnostics with recent application logs

Hardware

  • RTL2832U / RTL-SDR USB dongles
  • HackRF One over USB
  • Remote rtl_433 bridge over TCP
  • 315 MHz and 433.92 MHz presets

Focus

  • No Bluetooth permissions
  • No BLE enrichment or alert rules
  • No cloud sync or remote collection
  • Just SDR capture, TPMS history, and export
Build

CLI-only Android workflow

./gradlew testDebugUnitTest
./gradlew assembleDebug
./gradlew installDebug
./scripts/stage-apk