Bluetooth BLE smartphone connectivity

Feature	Details	Status
BLE beaconing	Sending beacon data with basic values encoded, to allow for the non-connected status acquisition
BLE connectable	Connect with the device to perform all function of data transmission and settings
BLE DFU	Firmware upgrade over BLE

BLE profiles

• DFU profile

• Nordic Serial profile (all data communication is via this profile)

Serial communication protocol

Select the best communication protocol for this application. TLV is a good approach.

Settings management

Shadow approach of settings management is the most straightforward method, similar as in AWS IoT core.

• Be able to send each setting entry separately

Research best implementation for settings management.

Specify a good way to include firmware versions in settings and communications