diff --git a/docs/reference/bluetooth/uart-read.md b/docs/reference/bluetooth/uart-read.md new file mode 100755 index 00000000..a1afcbfd --- /dev/null +++ b/docs/reference/bluetooth/uart-read.md @@ -0,0 +1,53 @@ +# UART Read + +### ~hint +![](/static/bluetooth/Bluetooth_SIG.png) + +For another device like a smartphone to use any of the Bluetooth "services" which the micro:bit has, it must first connect to the micro:bit. + +### ~ + +The [Bluetooth UART service](start-uart-service.md) allows another device such as a smartphone to exchange any data it wants to with the micro:bit, in small chunks. + +With the Bluetooth UART service running, this block allows a micro:bit to read data which has been received from a Bluetooth connected device, terminating reading and returning the value obtained as soon as a specified delimiter character is encountered. This means that connected devices can send data to the micro:bit and indicate that the complete message has been sent by appending the message with the delimiter character. + +```sig +bluetooth.uartRead(""); +``` + +### Example: Starting the Bluetooth UART service and then reading data received from another device which is terminated by ":" character and then displaying it + +```blocks +let uart_data: string = ""; +let connected = 0; +basic.showString("UART"); +bluetooth.startUartService(); +bluetooth.onBluetoothConnected(() => { + basic.showString("C"); + connected = 1; + while (connected == 1) { + uart_data = bluetooth.uartRead(":"); + basic.showString(uart_data); + } +}); +bluetooth.onBluetoothDisconnected(() => { + basic.showString("D"); +}); + +``` + +### Video - UART service guessing game + +https://www.youtube.com/watch?v=PgGeWddMAZ0 + +### Advanced + +For more advanced information on the micro:bit Bluetooth UART service including information on using a smartphone, see the [Lancaster University micro:bit runtime technical documentation](http://lancaster-university.github.io/microbit-docs/ble/uart-service/) + +### See also + +[Bluetooth SIG](https://www.bluetooth.com), [Bluetooth on micro:bit resources](http://bluetooth-mdw.blogspot.co.uk/p/bbc-microbit.html) + +```package +microbit-bluetooth +```