我喜欢这个网站。谢谢你们所做的一切！
我终于开始用Arduino Uno做自己的项目了。当我这样做时，我发现自己学得最好。我找到了一个关于从我的TMP36GZ获取温度的教程，通过Ardino读取我的16x2 LCD。太酷了！但现在，我想弄明白当温度达到最大值和/或最小值时，如何使CEM1203（42）蜂鸣器熄灭。我找到了一个简单的代码来让蜂鸣器也去。现在我只需要将两者结合起来。
以下是2个代码。我想，当温度为= / <65°F且= />> 75°F时，我会发出蜂鸣声。
感谢您提供的任何帮助。我很高兴能够学习这些东西！
/*
Piezo
This example shows how to run a Piezo Buzzer on pin 9
using the analogWrite() function.
It beeps 3 times fast at startup, waits a second then beeps continuously
at a slower pace
*/
void setup() {
// declare pin 9 to be an output:
pinMode(9, OUTPUT);
beep(50);
beep(50);
beep(50);
delay(1000);
}
void loop() {
beep(200);
}
void beep(unsigned char delayms){
analogWrite(9, 20); // Almost any value can be used except 0 and 255
// experiment to get the best tone
delay(delayms); // wait for a delayms ms
analogWrite(9, 0); // 0 turns it off
delay(delayms); // wait for a delayms ms
} /*
September 12 2013
October 25 2012
Based off of a project by DJ Mentzik.
Enhanced and modified by WWC and citin.
Supporting documents can be found at http://www.instructables.com/member/WWC/
Use and modife as needed.
Displays Current, 8 sec Average, Max and Min Temperature.
To wire your LCD screen to your Arduino, connect the following pins:
LCD Pin 6 to digital pin 12
LCD Pin 4 to digital pin 11
LCD Pin 11 to digital pin 5
LCD Pin 12 to digital pin 4
LCD Pin 13 to digital pin 3
LCD Pin 14 to digital pin 2
LCD PIN 15 to POS
LCD PIN 16 to GND
*/
#include <LiquidCrystal.h> // include the LCD driver library
//declare variables
float tempC = 0; // Variable for holding Celcius temp (floating for decimal points precision)
float tempf = 0; // variable for holding Fareghneit temp
int tempPin = 0; // Declaring the Analog input to be 0 (A0) of Arduino board.
float samples[8]; // Array to hold 8 samples for Average temp calculation
float maxi = 0,mini = 100; // Max/Min temperature variables with initial values. LM35 in simple setup only measures Temp above 0.
int i;
LiquidCrystal lcd(12, 11, 5, 4, 3, 2); // initialize the library with the numbers of the interface pins
void setup()
{
Serial.begin(9600); // Opens serial port, sets data rate to 9600 bps
lcd.begin(16, 2); // Set up the LCD's number of columns and rows:
lcd.setCursor(2, 0); // Set LCD cursor position (column, row)
lcd.print("Waynes World"); // Print text to LCD
lcd.setCursor(3, 1); // Set LCD cursor position (column,row)
lcd.print("Thermometer"); // Print text to LCD
delay(5000); // wait 500ms // Delay to read text
lcd.clear(); // clear LCD display // Clear the display
lcd.setCursor(2, 0); // Set LCD cursor position (column, row)
lcd.print("LCD Displayed"); // Print text to LCD
lcd.setCursor(1, 1); // Set LCD cursor position (column, row)
lcd.print(" Averaged Temp "); // Print text to LCD
delay(5000); // Delay to read text
lcd.clear(); // Clear LCD
}
void loop()
{
Serial.println(""); // Blank line for spacing in the serial monitor
Serial.println("You are looking at a project built by WWC."); // Print text to Serial monitor
Serial.print("Feal free to use and modife as needed.");
Serial.println(""); // Blank line for spacing in the serial monitor
Serial.print("LM35 Raw data: "); // Print text to Serial monitor
Serial.println(analogRead(tempPin)); // Displays on serial monitor the sampled value before conversion to real Temperature reading
// Start of calculations FOR loop.
for(i = 0;i<=7;i++){ // gets 8 samples of temperature
samples[i] = ( 4.4 * analogRead(tempPin) * 26) / 1024.0; // conversion math of tmp36GZ sample to readable temperature and stores result to samples array.
Serial.println(samples[i]); // Print samples [i] to sertiual monitor
// ( LCD note: line 1 is the second row, since counting begins with 0):
lcd.setCursor(0, 0); // Set LCD cursor position (column 0, row 0)
lcd.print("Current Temp is: "); // Print text to LCD
lcd.setCursor(1, 1); // Set LCD cursor position (column 1, row 1)
lcd.print(" Celcius "); // Print text to LCD
lcd.setCursor(12, 1); // Set LCD cursor position (column 12, row 1)
lcd.print(samples[i]); // print current Temp sample to LCD
tempC = tempC + samples[i]; // do the addition for average temperature
delay(800); // wait 800ms
} // END of FOR loop
Serial.println(""); // Blank line for spacing in the serial monitor
Serial.println(""); // Blank line for spacing in the serial monitor
tempC = tempC/8.0; // calculated the averare of 8 samples in Celcius
tempf = (tempC * 9)/ 5 + 32; // converts to fahrenheit
if(tempC > maxi) {maxi = tempC;} // set max temperature
if(tempC < mini) {mini = tempC;} // set min temperature
if(tempC >16.0)
// Send Results to Serial Monitor
Serial.println("New measurement:");
Serial.print(" Average Temperature in Celcius is " ); // Print text to Serial monitor
Serial.println(tempC);//send the data to the computer // Send the data to the computer
Serial.print(" Average Temperature in Farenait is " ); // Print text to Serial monitor
Serial.println(tempf);//send the data to the computer // Send the data to the computer
Serial.print(" MAX Temperature in Celcius is " ); // Print text to Serial monitor
Serial.println(maxi);//send the data to the computer // Send the data to the computer
Serial.print(" MIN Temperature in Celcius is " ); // Print text to Serial monitor
Serial.println(mini);//send the data to the computer // Send the data to the computer
// Send results to LCD.
lcd.setCursor(0, 1); // Set LCD cursor position (column 0, line 1)
lcd.print(" Fahrenheit "); // Print text to LCD
lcd.setCursor(12, 1); // Set LCD cursor position (column 12, line 1)
lcd.print(tempf); // Send the data to the LCD
delay(6000); // Wait 3 seconds to display the Fahrenheit temp and 3 seconds to display results to LCD screen befor starting the loop again = 6 seconds.
tempC = 0; // Set tempC to 0 so calculations can be done again
}
答案 0 :(得分：0)
你的温度代码中含有最多的温度代码，所以添加了它们。
通常您会从设置中转移所有内容。在这种情况下：
pinMode(9, OUTPUT);
是唯一必需的代码。如果你想让它在启动时发出哔哔声，你可以放入其余部分。
转移整个“void beep（）”函数。因此，您可以像在“void loop（）”函数中调用它一样调用它。
然后在你的临时代码中，在行中计算tempf：
tempf = (tempC * 9)/ 5 + 32;
输入一些代码：
if (tempf <= 65){
//low temp beep code here
}
else if (tempf >= 75) {
//high temp beep code here
}