Little Relay1.5.0

Little Relay transfers data between nearby Bluetooth Low Energy (BLE) equipment and an MQTT broker, using an Android device as the intermediary. It can carry information produced by BLE-connected equipment into MQTT-based systems, so those systems can receive data from devices that communicate locally over BLE. It also routes data from MQTT back to BLE equipment, supporting communication in the opposite direction.

This two-way bridge suits people working with Android devices alongside BLE hardware and MQTT environments that need to exchange data across both protocols. A typical use places the Android device between nearby equipment and an MQTT-based system, linking local device communication with a broker-connected network. Its defining capability is the focused connection of BLE and MQTT, rather than a collection of unrelated utilities.

Little Relay runs on Android 6.0 or newer and supports arm64-v8a, armeabi-v7a, x86_64, and x86 architectures. The current version is 1.5.0. It is open-source software, with use governed by its license. Operation depends on BLE equipment on one side and an MQTT broker or system on the other, making those communication endpoints central to its use.