Radio communication with Micro:bit

Radio communication with Micro:bit is a feature that allows Micro:bit to send and receive wireless signals. Micro:bit’s built-in radio module can be used to wirelessly communicate with other Micro:bits, remote control other devices and collect and transmit data.

The radio module uses the 2.4GHz ISM band and operates on a proprietary protocol, which allows for low-power, short-range communication. It has a range of around 100m (with line of sight).

To use radio communication with Micro:bit, you need to set up the radio module by initializing it and configuring it with the same channel and group on both Micro:bits.

Once the radio module is set up, you can use the Micro:bit’s built-in radio functions to send and receive messages. For example, you can use the radio.sendNumber() function to send a number and the radio.receiveNumber() function to receive a number.

It’s important to note that the Micro:bit radio module does not support encryption, so it’s not recommended to use it for sensitive or personal data transfer.

You can find more detailed information and example code for communicating with the Micro:bit’s radio module in the official documentation on the Micro:bit website.

The micro:bit card is equipped with a Bluetooth radio antenna.

The radio antenna on the device operates in the following frequencies, 2.4 GHz to 2.499 GHz.

The micro:bit card therefore allows communications by sending or receiving radio messages in the form of electromagnetic waves.

To use the radio, you must have at least 2 micro:bit cards.

At start-up, set « radio group » in the same range for both boards.

These ranges (groups) can range from 1 to 256.