Gravity BLE Sensor Beacon Pack of 5

The Gravity BLE sensor beacons from DFRobot read an analog or digital sensor and broadcast the value via Bluetooth Low Energy 5.3 as a beacon. Smartphones or an ESP32 within range receive the data without pairing. Format (iBeacon, Eddystone or custom), transmission interval and trigger are set with the NanoBeacon Config Tool, after which the beacon runs on its own after switching on. The set contains 5 beacons.

Important: The settings are permanently burned only once («Burn»), after that they can no longer be changed. Test first with «Run in RAM», which can be done any number of times. A USB-TTL adapter with 3.3 V is required for the configuration.

Recommended Accessories:

• Fermion FTDI USB UART 3.3/5V
• Mini USB UART FTDI Programmer 3.3/5V USB Serial

Features:

• IN100 chip with 11-bit ADC for analog and digital sensors with 3.3 V
• Sensor connection A, - and +; the sensor supply is switched on only while transmitting by default, permanently 3.3 V with a solder jumper
• Bluetooth Low Energy 5.3, formats iBeacon, Eddystone or custom
• Low current, below 2 mA with Eddystone TLM, suitable for battery operation
• Configuration without programming with the NanoBeacon Config Tool
• Examples in the wiki: reading data with the nRF Connect app or with an ESP32

Application Examples:

• Recording soil moisture at several plant pots without cables
• Distributing temperature sensors in warehouse, office and workshop
• Sensor nodes on farms
• Beacon for proximity services

Documentation:

• Wiki DFRobot TEL0149 with configuration and example for ESP32
• Datasheet (PDF)
• Schematic (PDF)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: TEL0149
• Chip: IN100
• Bluetooth: Low Energy 5.3
• Frequency: 2.4 GHz ISM
• Modulation: GFSK
• Transmit power: +5 dBm
• ADC: 11 bit
• Operating voltage: 3.3 to 5.5 V DC according to the product page, 1.2 to 5.5 V according to the wiki
• Operating current: below 2 mA (Eddystone TLM)
• Sensors: digital or analog, 3.3 V
• Connections: supply, pin header for configuration, sensor input A/-/+
• Dimensions: 27 × 33.5 × 6.7 mm
• Mounting holes: Ø 3.1 mm inside, 6 mm outside

Scope of Delivery:

• 5× Gravity BLE Sensor Beacon
• 5× pin header 4-pin