IoT Engineering

Hands-on of lesson 5

For slides and example code, see lesson 5

Note: Do not work on this repository right away.
Check existing forks to find the specific repository for your class.

a) HRM BLE peripheral, 10'

Build and run the nRF52840_HrmBlePeripheral example.
Explore the HRM example using a smartphone app,
e.g. nRF Connect for Android or iOS.
Try to enable notifications to get value updates.

b) UART BLE peripheral, 10'

Build and run the nRF52840_UartBlePeripheral example.
Write bytes to RX with a generic BLE explorer app.
Check the serial monitor to see the received bytes.
Why do some bytes not show up?

c) UART BLE central, 10'

Build and run the nRF52840_UartBleCentral example.
Open the Arduino serial monitor to enter a message.
Use a second nRF52840 as a UART peripheral.

d) Beacons, 10'

Build and run the nRF52840_BeaconBleObservable example.
Test the beacon with a dedicated iOS/Android app.
Which information is transferred by a beacon?
Start a scan in a public place, e.g. Zürich HB.

e) Scanner BLE central, 10'

Build and run the nRF52840_ScannerBleCentral example.
Add a checkReportForUuid() for the Battery Service.
Can you spot the UUID in the advertising data?

f) Challenge, 1h+

Design and implement an API for the DHT11 sensor.
Create UUIDs for your service and its characteristics.
Allow the central to read temperature and humidity.
Chose a data format that fits the sensor value range.
Test your peripheral with a generic BLE explorer.
Done? Consider adding support for notifications.