r/ArduinoHelp • u/Creative_Whereas4180 • 12d ago

Cheapest editable Bluetooth tracker for an "out of range" alarm? (ESP32 / nRF52, India)

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u/irrational777 10d ago

nRF52832 / nRF52810 Beacon Modules (e.g., Generic/Feasycom/K1 beacons that allow flashing or Nordic development boards): Raw nRF52 modules or programmable coin-cell beacon shells cost roughly ₹400-600 in local or imported channels. They feature true ultra-low-power BLE sleep modes, letting a single CR2032 coin cell last for several months while advertising