matlab-connect-bluetooth-low-energy-device

Scan for devices with blelist, optionally filtering by name or service UUID, then connect using ble("DeviceName") or ble(address). Once connected, access characteristics with characteristic(b, serviceUUID, characteristicUUID) and use read, write, or subscribe.

First create a characteristic object with characteristic(b, serviceUUID, characteristicUUID), then call read(c) or write(c, data). Read and write operate on characteristic objects, not on the ble connection object directly.

No. BLE functions such as blelist, ble, characteristic, read, write, and subscribe are built into MATLAB itself and require no additional toolbox. The Bluetooth Toolbox is not needed for BLE peripheral connections.

A connected BLE device stops advertising, so check the workspace for an existing connected ble object first. Also confirm the device is powered on, in advertising mode, within range, and not already connected to another application or MATLAB session.

BLE connections are exclusive, so another MATLAB session or application likely holds the connection to the same device. Disconnect from the other session with clear or by closing it, then reconnect from the current session.

Subscribe to the characteristic and set a DataAvailableFcn callback that calls read(src, "oldest") to consume buffered notifications in order. Avoid polling with read in a loop, which misses data between reads.