# Radio bridge Transfer the packet data received from the radio to the serial port. Use buttons **A** and **B** to select a radio group number. ```typescript /** * Download this code and connect the device to the computer. * Press A and B to select the radio group or change it in the code. */ let group = 0 /** * Send all received packets to serial output */ radio.onReceivedNumber(function (receivedNumber) { radio.writeReceivedPacketToSerial() led.toggle(Math.randomRange(0, 4), Math.randomRange(0, 4)) }) /** * Decrement radio group by 1 */ input.onButtonPressed(Button.A, function () { group = Math.max(0, group - 1) radio.setGroup(group) led.stopAnimation() basic.showNumber(group) }) /** * Increment radio group by 1 */ input.onButtonPressed(Button.B, function () { group = Math.min(255, group + 1) radio.setGroup(group) led.stopAnimation() basic.showNumber(group) }) group = 128 radio.setGroup(group) ``` ```package radio ```