Okdo Hall Magnetic Sensor Module Micro:bit and Arduino

The Okdo hall magnetic sensor uses the A3144E component, which is applied to detect the magnetic field. It can measure the magnetic object within 3cm by outputting digital signals(1/0). Note it can only detect the magnetic field instead of the magnetic strength.

Compatible with RJ11 6P6C OKdo TelePort Control boards and expansion shields
Detect the presence of a magnetic field with this reed switch based magnetic field sensor