5f7a8e5301
* update yotta defaults for 16kb devices * refactor deprecated blocks * updates for button events * update button events * update refference * update docs * update docs * update button event blocks * update docs * update block id
2.0 KiB
on Received Buffer
Run part of a program when the @boardname@ receives a buffer over radio.
radio.onReceivedBuffer(function (receivedBuffer) {})
The data contained in receivedBuffer is put there as a data type. The data might be a number or a string. When using buffers though, the way the data is placed in the buffer must have a specific format. In particular, numbers must have a certain order when their individual bytes are placed into the buffer. The numbers must also be retrieved from the buffer using the order that they were placed in when set there. You can read more about number formats.
Parameters
- receivedBuffer: The buffer that was sent in this packet or the empty string if this packet did not contain a string. See send buffer
Example: Remote level
Two @boardname@s work like remote levels. They lie flat and detect any change in the horizontal position of the plane that they sit in. Each board sends its level measurements to the other. Each level measurement is shown on the screen.
let ax = 0;
let ay = 0;
radio.setGroup(3)
basic.forever(() => {
ax = input.acceleration(Dimension.X);
ay = input.acceleration(Dimension.Y);
// encode data in buffer
let buf = pins.createBuffer(4)
buf.setNumber(NumberFormat.Int16LE, 0, ax)
buf.setNumber(NumberFormat.Int16LE, 2, ay)
radio.sendBuffer(buf)
})
radio.onReceivedBuffer(function (receivedBuffer) {
// decode data from buffer
ax = receivedBuffer.getNumber(NumberFormat.Int16LE, 0);
ay = receivedBuffer.getNumber(NumberFormat.Int16LE, 2);
// display
basic.clearScreen()
led.plot(
pins.map(ax, -1023, 1023, 0, 4),
pins.map(ay, -1023, 1023, 0, 4)
)
});
~hint
A radio that can both transmit and receive is called a transceiver.
~
See also
radio