我的项目遇到了一些障碍。我已经尝试了几个小时，似乎无法找出导致我问题的原因。
我正在尝试创建一个盒子，当它关闭时我可以使用蓝牙命令，arduino会播放响应。 当您打开该框时，它将播放一个独特的音频剪辑。
问题是，LDR工作正常，因为每当我打开盒子时都会播放独特的剪辑，但是当盒子关闭时，蓝牙响应不能按预期播放，它们只是播放一小段独特的响应从何时开放？ 因此，一旦打开盒子，就会播放独特的剪辑，并且蓝牙响应会按预期工作。
我尝试过使用switch case和for循环，但无济于事。
非常感谢您的帮助！
//Coded By: Angelo Casimiro (4/27/14)
//Voice Activated Arduino (Bluetooth + Android)
//Feel free to modify it but remember to give credit
//PCM library used to turn voice file into a string of text for the speaker.
//Credit to HighTechLowTech
#include <SD.h> // need to include the SD library
//#define SD_ChipSelectPin 53 //example uses hardware SS pin 53 on Mega2560
#define SD_ChipSelectPin 4 //using digital pin 4 on arduino nano 328, can use other pins
#include <TMRpcm.h> // also need to include this library...
#include <SPI.h>
TMRpcm tmrpcm; // create an object for use in this sketch
int ldrPin = A2; //declared LDR on analog pin 2
int ldrValue = 0; //reading different values from the LDR
//declare voice as a string of data
String voice;
void setup() {
//Speaker pin
tmrpcm.speakerPin = 9;
Serial.begin(9600);
if (!SD.begin(SD_ChipSelectPin)) { // see if the card is present and can be initialized:
Serial.println("SD fail");
return; // don't do anything more if not
}
}
//-----------------------------------------------------------------------//
void loop() {
while (Serial.available()){ //Check if there is an available byte to read
delay(50); //Delay added to make thing stable
char c = Serial.read(); //Conduct a serial read
if (c == '#') {break;} //Exit the loop when the # is detected after the word
voice += c; //Shorthand for voice = voice + c
}
if (voice.length() > 0) {
Serial.println(voice);
}
//LDR variable defined from analog pin 2
ldrValue = analogRead(ldrPin);
//define LDR value ranges and map them to cases
//if voice string is "marco" then playback the sample array
if(voice == "*marco") {tmrpcm.play("Polo!.wav");}
else if(voice == "*hello") {tmrpcm.play("Hello!.wav");}
else if(voice == "*where") {tmrpcm.play("here.wav");}
else if(voice == "*who") {tmrpcm.play("Scott.wav");}
else if(voice == "*knock knock") {tmrpcm.play("Who.wav");}
else if(ldrValue > 500) {tmrpcm.play("Burp.wav");}
voice="";
delay(1);
}
使用切换案例可能更容易在此草图中看到。
基本上，当盒子关闭时，我可以在串行监视器中看到案例2处于活动状态，这就是我想要的。 当盒子打开时，案例1处于活动状态，但是在我再次关闭它并且它切换回案例2之前它没有播放'Burp.wav'
//Coded By: Angelo Casimiro (4/27/14)
#include <SD.h> // need to include the SD library
//#define SD_ChipSelectPin 53 //example uses hardware SS pin 53 on Mega2560
#define SD_ChipSelectPin 4 //using digital pin 4 on arduino nano 328, can use other pins
#include <TMRpcm.h> // also need to include this library...
#include <SPI.h>
TMRpcm tmrpcm; // create an object for use in this sketch
//declare voice as a string of data
String voice;
//LDR value Range
const int sensorMin = 100;
const int sensorMax = 480;
void setup()
{
//Speaker pin
tmrpcm.speakerPin = 9;
Serial.begin(9600);
if (!SD.begin(SD_ChipSelectPin))
{
// see if the card is present and can be initialized:
Serial.println("SD fail");
return; // don't do anything more if not
}
}
//-----------------------------------------------------------------------//
void loop()
{
while (Serial.available())
{
//Check if there is an available byte to read
delay(50); //Delay added to make thing stable
char c = Serial.read(); //Conduct a serial read
if (c == '#')
{
break; //Exit the loop when the # is detected after the word
}
voice += c; //Shorthand for voice = voice + c
}
if (voice.length() > 0)
{
Serial.println(voice);
}
//LDR variable defined from analog pin 2
int sensorReading = analogRead(A2);
Serial.println(sensorReading);
//define LDR value ranges and map them to cases
int range = map(sensorReading, sensorMin, sensorMax, 1, 2);
Serial.println(range);
switch (range)
{
case 1:
{
tmrpcm.play("Burp.wav");
}
break;
case 2:
//if voice string is "marco" then playback the sample array
if (voice == "*marco")
{
tmrpcm.play("Polo!.wav");
}
else if (voice == "*hello")
{
tmrpcm.play("Hello!.wav");
}
else if (voice == "*where")
{
tmrpcm.play("here.wav");
}
else if (voice == "*who")
{
tmrpcm.play("Scott.wav");
}
else if (voice == "*knock knock")
{
tmrpcm.play("Who.wav");
}
voice = "";
break;
}
delay(50);
Serial.println();
}