DFRobot Fermion BLE Sensor Beacon Pack - 5 pieces

This wireless BLE sensor beacon from DFRobot can collect data from a digital or analog sensor and broadcast the value via BLE. Other devices with Bluetooth, such as a smartphone or microcontroller with Bluetooth (e.g. an ESP32) can then read out the value.

See the following page for more information: Wiki

Note: Because the code on this product can be locked, it cannot be returned once the sealed package has been opened.