Arduino101提供了蓝牙4.0，可以与外界通信，官方给了一个检测外部电压然后把数据传到中心设备上。下面就一起来试一试。
官方提供了在中心设备上的可使用的app：nRF Master Control Panel (BLE) for Android and iOS，在app Store里可找到下载。
同时还需要一个旋转电位器：
接线如图：
官方的示例代码：
/*
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
*/
#include
/*
This sketch example partially implements the standard Bluetooth Low-Energy Battery service.
For more information: [url=https://developer.bluetooth.org/gatt/services/Pages/ServicesHome.aspx]h… ... s/ServicesHome.aspx[/url]
*/
/* */
BLEPeripheral blePeripheral; // BLE Peripheral Device (the board you're programming)
BLEService batteryService("180F"); // BLE Battery Service
// BLE Battery Level Characteristic"
BLEUnsignedCharCharacteristic batteryLevelChar("2A19", // standard 16-bit characteristic UUID
BLERead | BLENotify); // remote clients will be able to
// get notifications if this characteristic changes
int oldBatteryLevel = 0; // last battery level reading from analog input
long previousMillis = 0; // last time the battery level 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("BatteryMonitorSketch");
blePeripheral.setAdvertisedServiceUuid(batteryService.uuid()); // add the service UUID
blePeripheral.addAttribute(batteryService); // Add the BLE Battery service
blePeripheral.addAttribute(batteryLevelChar); // add the battery level characteristic
batteryLevelChar.setValue(oldBatteryLevel); // initial value for this 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 battery level every 200ms
// as long as the central is still connected:
while (central.connected()) {
long currentMillis = millis();
// if 200ms have passed, check the battery level:
if (currentMillis - previousMillis >= 200) {
previousMillis = currentMillis;
updateBatteryLevel();
}
}
// when the central disconnects, turn off the LED:
digitalWrite(13, LOW);
Serial.print("Disconnected from central: ");
Serial.println(central.address());
}
}
void updateBatteryLevel() {
/* Read the current voltage level on the A0 analog input pin.
This is used here to simulate the charge level of a battery.
*/
int battery = analogRead(A0);
int batteryLevel = map(battery, 0, 1023, 0, 100);
if (batteryLevel != oldBatteryLevel) { // if the battery level has changed
Serial.print("Battery Level % is now: "); // print it
Serial.println(batteryLevel);
batteryLevelChar.setValue(batteryLevel); // and update the battery level characteristic
oldBatteryLevel = batteryLevel; // save the level for next comparison
}
}
下载以后打开app可以看到下面的信息：
找到101点击connect后可以看到：
这时候旋转电位器可以看到Value的值随之改变（16进制）与此同时可以在串口监视器里看到返回相同的value。
文章来源：Arduino中文社区