DEFBU: micro:bit logger

micro:bit logger

micro:bit logger enables users to log data via bluetooth LE

Supported services

Temperture Service
Accelerometer Service
Magnetometer Service
Button Service

Logging can be enabled per service. The Device Information Service and DFU Service can not be logged.

Supported export formats

SQLite
CSV (;)
CSV (,)
Tab-delimiter

Export via email

Prepared Hex-files

Security enabled - pair - tx level 0
Security enabled - pair - tx level 7 (consumes more power)
Security disabled - open - tx level 0
Security disabled - open - tx level 7 (consumes more power)

All hex-files are based on micro:bit firmware 2.0.0-rc9--g

The following services are enabled: DFU Control, Device Information, Temperature, Magnetometer, Accelerometer and Button.

Preparing micro:bit and pairing

Upload one of the above hex-files to your micro:bit
Wait until the micro:bit asks you to draw a circle
Draw a circle by moving the micro:bit. This will calibrate the compass

Pairing (Only required if security enabled)

Make sure that bluetooth is enabled on your device
Open the MB:logger app
Initiate pairing mode on micro:bit. Hold A + B and press the reset button briefly. Wait until your see the scrolling text "PAIRING MODE".
Release button A and B.
Press the button rescan for devices
Tap your micro:bit
Click on Connect
The system will ask you for a pin. Press button A on the micro:bit.
Enter all 6 digits and press OK.
The micro:bit will restart. Wait until the micro:bit is completely rebooted. In some cases it is required to recalibrate the compass by drawing a circle.
Tap Connect

Common issues

Services don't appear in list after pairing

After pairing the micro:bit does not broadcast all available services from the start. As a result the services are not shown in the list. Try to disconnect and connect a couple of times to solve the issue. If this does not help, try to restart your app, phone and micro:bit or try a hex-file without security enabled.

All values are 0

The app didn't receive any notification from the micro:bit. Normally a notification should be received by the micro:bit within the first couple of seconds after a connection is established. If not, press Disconnect followed by Connect.