问题描述
我有一个项目要为学校做:拳击手的俘虏。这将是 我必须将 Arduino nano 33 ble Sense 与蓝牙连接。 这个想法是将加速度计的数据传输到带有应用程序的智能手机(可能使用麻省理工学院的应用程序 Inventor 制作)。 因此,向运动员展示他的击球力量(加速度--)力量--)力量)。 但我没有设法将我的 arduino 连接到我的智能手机。事实上,我按照教程来连接它。事实上,我成功地将 arduino 与 nFr connect 连接起来,但我什么也做不了。
有问题的代码(用于蓝牙 nFr 连接)在这里:(这只是一个例子,因为我的最终目标是使用加速度计来做到这一点)
#include <ArduinoBLE.h>
#include <Arduino_LSM9DS1.h>
BLEService dataService("180C"); // User defined service
BLEStringCharacteristic dataCharacteristic("2A56",// standard 16-bit characteristic UUID
BLERead | BLENotify,13); // remote clients will be able to read and subscribe to notifications
int oldValue = 0; // last value
long prevIoUsMillis = 0; // last time the value was checked,in ms
void setup()
{
Serial.begin(9600); // initialize serial communication
while (!Serial)
;
pinMode(LED_BUILTIN,OUTPUT); // initialize the built-in LED pin
if (!BLE.begin()) { // initialize BLE
Serial.println("starting BLE Failed!");
while (1)
;
}
BLE.setLocalName("Sac de frappe"); // Set name for connection
BLE.setAdvertisedService(dataService); // Advertise service
dataService.addCharacteristic(dataCharacteristic); // Add characteristic to service
BLE.addService(dataService); // Add service
dataCharacteristic.setValue(String(oldValue)); // Set data string
BLE.advertise(); // Start advertising
Serial.print("Peripheral device MAC: ");
Serial.println(BLE.address());
Serial.println("Waiting for connections...");
Serial.begin(9600);
while (!Serial);
Serial.println("Started");
if (!IMU.begin()) {
Serial.println("Failed to initialize IMU!");
while (1);
}
Serial.print("Accelerometer sample rate = ");
Serial.print(IMU.accelerationSampleRate());
Serial.println(" Hz");
Serial.println();
Serial.println("acceleration in G's");
Serial.println("X\tY\tZ");
}
void loop()
{
BLEDevice central = BLE.central(); // Wait for a BLE central to connect
// if a central is connected to the peripheral:
if (central) {
Serial.print("Connected to central MAC: ");
// print the central's BT address:
Serial.println(central.address());
// turn on the LED to indicate the connection:
digitalWrite(LED_BUILTIN,HIGH);
// update value every 200ms
// while the central is connected:
while (central.connected()) {
long currentMillis = millis();
// if 200ms have passed,update value:
if (currentMillis - prevIoUsMillis >= 200) {
prevIoUsMillis = currentMillis;
updateValue();
}
}
}
// when the central disconnects,turn off the LED:
digitalWrite(LED_BUILTIN,LOW);
Serial.print("disconnected from central MAC: ");
Serial.println(central.address());
float x,y,z;
if (IMU.accelerationAvailable()) {
IMU.readacceleration(x,z);
Serial.print(x);
Serial.print('\t');
Serial.print(y);
Serial.print('\t');
Serial.println(z);
}
}
void updateValue() {
int value = analogRead(A0); // Read your accelerometer data here
if (value != oldValue) {
Serial.print("Accelerometer Data is Now: "); // print it
Serial.println(value);
dataCharacteristic.writeValue(String(value)); // update value
// save the level for next comparison
oldValue = value;
}
}
感谢您的帮助(对不起我的英语)
解决方法
已编辑以匹配有问题的已编辑代码
要传输加速度计数据,您可以执行类似于 BatteryMonitor example 的操作:
在您的特征上使用通知,让您的智能手机无需经常手动阅读即可接收更改。在中央连接时不断读取和更新加速度计数据。
#include <ArduinoBLE.h>
#include <Arduino_LSM9DS1.h>
BLEService dataService("180C"); // User defined service
BLEStringCharacteristic dataCharacteristic("2A56",// standard 16-bit characteristic UUID
BLERead | BLENotify,50); // remote clients will be able to read and subscribe to notifications
float oldX = 0.0; // last value
float oldY = 0.0;
float oldZ = 0.0;
long previousMillis = 0; // last time the value was checked,in ms
void setup()
{
Serial.begin(9600); // initialize serial communication
while (!Serial)
;
pinMode(LED_BUILTIN,OUTPUT); // initialize the built-in LED pin
if (!BLE.begin()) { // initialize BLE
Serial.println("starting BLE failed!");
while (1)
;
}
BLE.setLocalName("Sac de frappe"); // Set name for connection
BLE.setAdvertisedService(dataService); // Advertise service
dataService.addCharacteristic(dataCharacteristic); // Add characteristic to service
BLE.addService(dataService); // Add service
dataCharacteristic.setValue(""); // Set initial value
BLE.advertise(); // Start advertising
Serial.print("Peripheral device MAC: ");
Serial.println(BLE.address());
Serial.println("Waiting for connections...");
Serial.begin(9600);
while (!Serial);
Serial.println("Started");
if (!IMU.begin()) {
Serial.println("Failed to initialize IMU!");
while (1);
}
Serial.print("Accelerometer sample rate = ");
Serial.print(IMU.accelerationSampleRate());
Serial.println(" Hz");
Serial.println();
Serial.println("Acceleration in G's");
Serial.println("X\tY\tZ");
}
void loop()
{
BLEDevice central = BLE.central(); // Wait for a BLE central to connect
// if a central is connected to the peripheral:
if (central) {
Serial.print("Connected to central MAC: ");
// print the central's BT address:
Serial.println(central.address());
// turn on the LED to indicate the connection:
digitalWrite(LED_BUILTIN,HIGH);
// update value every 200ms
// while the central is connected:
while (central.connected()) {
long currentMillis = millis();
// if 200ms have passed,update value:
if (currentMillis - previousMillis >= 200) {
previousMillis = currentMillis;
updateValue();
}
}
}
// when the central disconnects,turn off the LED:
digitalWrite(LED_BUILTIN,LOW);
Serial.print("Disconnected from central MAC: ");
Serial.println(central.address());
}
void updateValue() {
float x,y,z;
if (!IMU.accelerationAvailable()) return; // Return if not ready
IMU.readAcceleration(x,z); // Read new data
if (x != oldX || y != oldY || z != oldZ) {
// print it
Serial.print(x);
Serial.print('\t');
Serial.print(y);
Serial.print('\t');
Serial.println(z);
dataCharacteristic.writeValue("X: " + String(x) + " Y: " + String(y) + " Z: " + String(z)); // update value
// save the value for next comparison
oldX = x;
oldY = y;
oldZ = z;
}
}
您可以使用 nRF Connect 验证功能。如果一切正常,您可以继续开发您自己的应用程序。