received Signal Strength

Find how strong the radio signal is.

radio.receivedSignalStrength();

Deprecated

This API has been deprecated! Use received packet instead.

Find how strong the radio signal is, from -128 to -28. (-128 means a weak signal and -28 means a strong one.)

The micro:bit finds the signal strength by checking how strong it was the last time it ran the on received number function. That means it needs to run receive number first.

Returns

a number between -128 and -28 that means how strong the signal is.

Signal strength and board version

Measurement of the received signal strength is dependent on what version of micro:bit you have. The micro:bit boards prior to v2 can typically measure a signal strength up to -42 dBm. Now, v2 boards will measure a signal strength up to -28 dBm (typical).

Simulator

This function only works on the micro:bit, not in browsers.

Example

This example shows how strong the radio signal of the light level sender example is.

let x = 0;
radio.setGroup(99);
basic.forever(() => {
    x = radio.receiveNumber();
    basic.showNumber(radio.receivedSignalStrength());
});