Case 12: The Burglar Alarm in Shops
- After installing the bulglar alarm device in shops, program to send alarms if someone breaks into the shops.
- Detect the magnet from the magnetic(compass) function on the micro:bit, if the magnet goes far from the micro:bit, program to send alarms and light on the LED.
Note: A piece of magnet requires in this project.
Connect the red led to P1 port on IoT:bit.
Click "Advanced" in the MakeCode drawer to see more choices.
For programming, we need to add a package: click "Extensions" at the bottom of the MakeCode drawer and search with "iot-environment-kit" in the dialogue box to download it.
Notice: If you met a tip indicating that some codebases would be deleted due to incompatibility, you may continue as the tips say or create a new project in the menu.
Detect the magnetic intensity in the current field, if the returned value is below the threhold, program to send alarms and flash on the led.
- If someone breaks into the shop, the device sends alarms and the led keeps flashing.