On a Heltec V4 or V3 the sensor has no screen and no interface — it just detects and reports, so pair it with the PDL Tactical Android app to see what it's seeing. (The LilyGo T-Deck Plus build has its own display and is usable standalone.) Get both, in order:
Firmware v1.5 · uploaded 2 Aug 2026 · three boards in one release with a named image per unit, verified live on all six fielded sensors; fleet-wide wireless updates with A/B rollback; identical position/timestamp across LoRa, BLE, C2, MQTT and peer relay; self-healing C2 heartbeat and 60 s MQTT status; remote HTTP management. Earlier: LoRa peer-relay for detections and health (v1.4), Mythos corrections on-device (v1.2), CSI localized-carrier detector (v1.1).
Your interface to the sensor — live map, BLE pairing, and detections. Install this first so it's ready when the sensor powers up.
⬇ Download PDL Tactical APKSix images — one per named unit — covering the Heltec WiFi LoRa V4, the Heltec V3 and the LilyGo T-Deck Plus, plus full source. The README carries the esptool flash command, the over-the-air upgrade path, and the partition-table note for moving off v1.4.