作者：Jason_G
简单的实验，我们用手机蓝牙发送数据，控制开发板13引脚连接的LED灯，发送0表示关灯，发送非0数据表示开灯。
1、下载必要的蓝牙软件：lightBLE
2、在IDE中打开蓝牙驱动库中的实例LED：CurieBLE\examples\LED，下载到开发板！
/*
Copyright (c) 2015 Intel Corporation. All rights reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
This sketch example partially implements the standard Bluetooth Low-Energy Heart Rate service.
For more information: https://developer.bluetooth.org/gatt/services/Pages/ServicesHome.aspx
*/
#include
BLEPeripheral blePeripheral; // BLE Peripheral Device (the board you're programming)
BLEService heartRateService("180D"); // BLE Heart Rate Service
// BLE Heart Rate Measurement Characteristic"
BLECharacteristic heartRateChar("2A37", // standard 16-bit characteristic UUID
BLERead | BLENotify, 2); // remote clients will be able to get notifications if this characteristic changes
// the characteristic is 2 bytes long as the first field needs to be "Flags" as per BLE specifications
// https://developer.bluetooth.org/gatt/characteristics/Pages/Characteristi...
int oldHeartRate = 0; // last heart rate reading from analog input
long previousMillis = 0; // last time the heart rate was checked, in ms
void setup() {
Serial.begin(9600); // initialize serial communication
pinMode(13, OUTPUT); // initialize the LED on pin 13 to indicate when a central is connected
/* Set a local name for the BLE device
This name will appear in advertising packets
and can be used by remote devices to identify this BLE device
The name can be changed but maybe be truncated based on space left in advertisement packet */
blePeripheral.setLocalName("HeartRateSketch");
blePeripheral.setAdvertisedServiceUuid(heartRateService.uuid()); // add the service UUID
blePeripheral.addAttribute(heartRateService); // Add the BLE Heart Rate service
blePeripheral.addAttribute(heartRateChar); // add the Heart Rate Measurement characteristic
/* Now activate the BLE device. It will start continuously transmitting BLE
advertising packets and will be visible to remote BLE central devices
until it receives a new connection */
blePeripheral.begin();
Serial.println("Bluetooth device active, waiting for connections...");
}
void loop() {
// listen for BLE peripherals to connect:
BLECentral central = blePeripheral.central();
// if a central is connected to peripheral:
if (central) {
Serial.print("Connected to central: ");
// print the central's MAC address:
Serial.println(central.address());
// turn on the LED to indicate the connection:
digitalWrite(13, HIGH);
// check the heart rate measurement every 200ms
// as long as the central is still connected:
while (central.connected()) {
long currentMillis = millis();
// if 200ms have passed, check the heart rate measurement:
if (currentMillis - previousMillis >= 200) {
previousMillis = currentMillis;
updateHeartRate();
}
}
// when the central disconnects, turn off the LED:
digitalWrite(13, LOW);
Serial.print("Disconnected from central: ");
Serial.println(central.address());
}
}
void updateHeartRate() {
/* Read the current voltage level on the A0 analog input pin.
This is used here to simulate the heart rate's measurement.
*/
int heartRateMeasurement = analogRead(A0);
int heartRate = map(heartRateMeasurement, 0, 1023, 0, 100);
if (heartRate != oldHeartRate) { // if the heart rate has changed
Serial.print("Heart Rate is now: "); // print it
Serial.println(heartRate);
const unsigned char heartRateCharArray[2] = { 0, (char)heartRate };
heartRateChar.setValue(heartRateCharArray, 2); // and update the heart rate measurement characteristic
oldHeartRate = heartRate; // save the level for next comparison
}
}
3、打开手机蓝牙，打开软件lightBLE,会显示101的蓝牙设备名称，点击设备名连接即可：
4、出现下面的界面表示连接成功，点击最下面的设备（0x19B10001-E8F2-537E-XXXX）：
5、如果顺利会出现下面的界面，这里我们就可以向开发板发送数据了，点击Write new value：
6、点击Write new value后可输入数字，然后点击右下角的Done即可发送数据，发送0关闭小灯，非0值打开小灯：
7、我们在电脑IDE的串口中也能看到相关信息：
备注：如果蓝牙连接后界面和上面不一样，你需要忽略手机设置里的蓝牙连接
OK，蓝牙控制开发板的基本操作可以玩起来了！
文章来源：DF创客空间