59 lines
1.2 KiB
Markdown
59 lines
1.2 KiB
Markdown
|
# Send Buffer
|
||
|
|
|
||
|
|
Sends a buffer to other @boardname@s in the area connected by radio. The
|
||
|
|
maximum buffer length is 19 bytes.
|
||
|
|
|
||
|
|
```sig
|
||
|
|
radio.sendBuffer(pins.createBuffer(1))
|
||
|
|
```
|
||
|
|
|
||
|
|
## Parameters
|
||
|
|
|
||
|
|
* `msg` is a [buffer](/types/buffer) to send by radio.
|
||
|
|
|
||
|
|
|
||
|
|
## Example: Remote level
|
||
|
|
|
||
|
|
If you load this program onto two @boardname@s, each board will send the level information to the other board.
|
||
|
|
|
||
|
|
```typescript
|
||
|
|
let ax = 0;
|
||
|
|
let ay = 0;
|
||
|
|
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
|
||
|
|
|
||
|
|
[on received buffer](/reference/radio/on-received-buffer)
|
||
|
|
|
||
|
|
```package
|
||
|
|
radio
|
||
|
|
```
|