updated docs

docs/reference/radio.md

@@ -4,13 +4,17 @@ Communicate data using radio packets
 
 ```cards
 radio.sendNumber(0);
-radio.sendNumbers(0, 0, 0, 0);
+radio.sendValue("data", 0);
+radio.sendString("");
 radio.onDataReceived(() => {
     
 });
 radio.receiveNumber();
 radio.receivedNumberAt(0);
+radio.receiveString();
 radio.receivedSignalStrength();
 radio.setGroup(0);
 radio.setTransmitPower(0);
+radio.writeValueToSerial();
+radio.setTransmitSerialNumber(◊);
 ```