Gravity: BLE Sensor Beacon Pack (5 PCS)

The Gravity: BLE Sensor Beacon Pack includes five wireless sensor nodes designed to broadcast digital and analog sensor readings over Bluetooth Low Energy. Built with an integrated 11-bit ADC, these beacons convert conventional 3.3V sensors into untethered data points without requiring device pairing or complex code. They are ideal for makers, students, and engineers developing long-term IoT telemetry for agriculture, warehousing, and smart spaces.

Wireless BLE sensor broadcasting

Featuring a built-in 11-bit ADC, each beacon collects signals from connected sensors and broadcasts the telemetry over Bluetooth Low Energy. Nearby BLE scanners, such as smartphones or ESP32 boards, can read the data stream directly within range without establishing a paired connection.

Analogue and digital sensor integration

The module interfaces seamlessly with any standard 3.3V digital or analog sensor, easily upgrading wired components into wireless broadcast nodes. This eliminates long cable runs and local microcontroller setups in multi-point sensing systems like smart farm soil monitoring.

Low power consumption for long deployments

Operating at 3.3V to 5.5V DC with a current draw under 2mA at Eddystone TLM, these beacons can run for months or years on battery power. Adjustable transmission frequency and signal strength settings allow developers to tune power consumption for remote battery-operated tasks.

No-code graphical configuration

Device setup is managed through a graphical interface via a 3.3V USB-TTL tool without requiring firmware programming. Settings can be tested repeatedly in RAM before executing the final, permanent one-time burn to the beacon module.

Customisable broadcast protocols and applications

The beacon supports official iBeacon and Eddystone formats alongside fully custom broadcast payload structures. Broadcast intervals and trigger conditions can be customised for deployments across smart offices, warehouses, retail navigation, and automated smart locks.

Compact hardware and package contents

Each board measures 27mm by 33.5mm with a 3.1mm inner diameter mounting hole, transmitting at +5.0dBm across the 2.4GHz ISM band using GFSK modulation. The pack includes five Gravity: BLE Sensor Beacons and five 4-pin connection cables.

Downloads & documentation

• Product wiki (DFRobot)