Board used

nRF52840 Dongle

Features

Bluetooth Low Energy (BLE) (Softdevice s140)

• [x] Multi-peripheral connections
• [x] Peer Manager
• [x] 1 Service and 3 Characteristics
• [ ] Whitelist support

Tools used

1. nRF5 SDK v17.1.0 – Software Development Kit
2. Segger Embedded Studio – IDE for development and building
3. nRF Connect programmer – Tool for flashing firmware

Working

→ When the dongle is advertising and looking for connections (Led: 1, Color: yellow-green)

→ When one Android device is connected (Led: 2, Color: red)

→ When two android devices are connected (Led: 2, Color: red) (Max peripheral count is set to 2, but can be increased till 20)

• Note: Advertising will continue until the maximum number of peripheral connections is established (in this case, 2)

Now let’s walk through the characteristics

• Value increments each time an additional Android device connects*.** (You can check it out in the raw demo video below)*