a93febb5b7
* add image and deprecated arrow functions * update locales * map basic.showArrow * map arrow blocks * map & remove arrow images * remove arrow blocks * update locales * remove & patch: rgbw -> rgb button/pin pressed -> button/pin event loudness -> soundLevel * update ts mappings for arrows * add wip ts patch rules * update .blocks files * use Click instead of Down as default in Documentation and tests * patch test.blocks * fix lowercase name tag * update test.blocks * update blocks test files * update blocks test files * format block files * pass blocks file tests * fix ts mapping * fix color.defl value closes https://github.com/microsoft/pxt-calliope/issues/136 * fix ts mappings - add optional spacing at the end of rgbw() - map up to v4.0.19 * add suggested changes * replace innerText by textContent Co-authored-by: JW <gitkraken@juriwolf.de> Co-authored-by: Juri <info@juriwolf.de>
52 lines
2.1 KiB
Markdown
52 lines
2.1 KiB
Markdown
# UART Write String
|
|
|
|
## ~hint
|
|
|
|
|
|
For another device like a smartphone to use any of the Bluetooth "services" which the @boardname@ has, it must first be [paired with the @boardname@](/reference/bluetooth/bluetooth-pairing). Once paired, the other device may connect to the @boardname@ and exchange data relating to many of the @boardname@'s features.
|
|
|
|
## ~
|
|
|
|
The [Bluetooth UART service](/reference/bluetooth/start-uart-service) allows another device such as a smartphone to exchange any data it wants to with the @boardname@, in small chunks.
|
|
|
|
With the Bluetooth UART service running, this block allows a @boardname@ to send data to a Bluetooth connected device.
|
|
|
|
```sig
|
|
bluetooth.uartWriteString("");
|
|
```
|
|
|
|
## Example: Starting the Bluetooth UART service and then sending "HELLO" whenever button A is pressed and another device has connected over Bluetooth
|
|
|
|
```blocks
|
|
let connected = 0;
|
|
bluetooth.onBluetoothConnected(() => {
|
|
basic.showString("C");
|
|
connected = 1;
|
|
});
|
|
bluetooth.onBluetoothDisconnected(() => {
|
|
basic.showString("D");
|
|
connected = 0;
|
|
});
|
|
input.onButtonEvent(Button.A, ButtonEvent.Down, () => {
|
|
if (connected == 1) {
|
|
bluetooth.uartWriteString("HELLO");
|
|
}
|
|
});
|
|
```
|
|
|
|
## Video - UART service guessing game
|
|
|
|
https://www.youtube.com/watch?v=PgGeWddMAZ0
|
|
|
|
## Advanced
|
|
|
|
For more advanced information on the @boardname@ Bluetooth UART service including information on using a smartphone, see the [Lancaster University @boardname@ runtime technical documentation](http://lancaster-university.github.io/microbit-docs/ble/uart-service/)
|
|
|
|
## See also
|
|
|
|
[About Bluetooth](/reference/bluetooth/about-bluetooth), [@boardname@ Bluetooth profile overview ](http://lancaster-university.github.io/microbit-docs/ble/profile/), [@boardname@ Bluetooth profile reference](http://lancaster-university.github.io/microbit-docs/resources/bluetooth/microbit-profile-V1.9-Level-2.pdf), [Bluetooth on @boardname@ resources](http://bluetooth-mdw.blogspot.co.uk/p/bbc-microbit.html), [Bluetooth SIG](https://www.bluetooth.com)
|
|
|
|
```package
|
|
bluetooth
|
|
```
|