This is a radio program so you’ll need 2 micro:bits running to get it to work. The program “sends” a duck using the radio by shacking the micro:bit.

In code, the accelerometer sensor is used in two rules to clear the screen (duck is gone) and send a number using the radio.

• when shake, do clear screen.

• when shake, do radio send 1.

The third rule uses the radio filter to render the duck on the screen. This rule executes when a radio message is received.

• when radio receive 1, do paint duck on screen.

• when radio receive 1, do play sound emoji hello.

Avoiding clashes with groups

If you try this activity with many micro:bits in the same room, they will all start to trigger the activity. You can avoid groups interference by

• have student use a different radio value than 1
• add a rule that runs on the start of the page and sets a different radio group (default is 1) using radio set group. The message only reach other micro:bit in the same group.

Improvement ideas

• add sound emoji when the duck arrives
• use different radio messages for different images

Video