Central Device
Formal
There is a peripheral (slave) device or a central (master) device when connecting devices over BLE. The central device will typically have more computing resources and available energy - a computer or a tablet, for example.
Practical
When connecting devices over BLE, there is a peripheral (slave) device or a central (master) device. The Bluetooth standard established this division to match the resources available on the devices. The central device will typically have more computing resources and available energy - a computer or a tablet, for example.
