查看SKU:RB-02S160 DS18B20 水温传感器的源代码

[[文件:02S16001.jpg|500px|缩略图|右]]
==产品概述==
DS18B20是常用的数字温度传感器，其输出的是数字信号，具有体积小，硬件开销低，抗干扰能力强，精度高的特点。 DS18B20数字温度传感器接线方便，封装成后可应用于多种场合，如管道式，螺纹式，磁铁吸附式，不锈钢封装式等。主要根据应用场合的不同而改变其外观。<br/>
DS18B20水温水温传感器采用的是不锈钢封装，防水防潮。封装后的DS18B20可用于电缆沟测温，高炉水循环测温，锅炉测温，机房测温，农业大棚测温，洁净室测温，弹药库测温等各种非极限温度场合，适用于各种狭小空间设备数字测温和控制领域。<br/>

==产品参数==
===基本参数===
# 品名：DS18B20水温传感器
# 货号：RB-02S160
# 品牌：奥松机器人
# 产地：哈尔滨
# 固定孔：M3*4
# 电缆长度：90cm
# 传感器：直径6mm，长30mm

===电气参数===
1.接口类型：3P防插反接口<br/>
2.信号类型：数字信号<br/>
3.工作电压：3V - 5.5V<br/>
4.引脚定义：<br/>
* +：电源正极
* -：电源负极
* S：信号端
5.传感器接口：KF2510-3P防插反接口<br/>
6.测试范围：-55℃~+125℃（-67°F至+ 257°F）<br/>
7.测量精度：在－10～＋85℃范围内精确度为±5℃<br/>
8.测量分辨率：温度计分辨率可以被使用者选择为9～12位<br/>
[[文件:02S16002.png|500px|缩略图|居中]]

==使用方法==
===example1_Arduino===
* 主要硬件
:Arduino UNO 控制器
:传感器扩展板 V5.0
:DS18B20 温度传感器
:单头防插反 3P 传感器连接线
:USB 数据线
* 硬件连接
[[文件:02S16004.png|500px|缩略图|居中]]

* 示例程序
<pre style='color:blue'>
#define Skip_ROM 		0xCC
#define Convert_T 		0x44
#define Read_scratchpad         0xBE

#define Port_18B20 	7
#define Tx_18B20 	pinMode(Port_18B20, OUTPUT)
#define Rx_18B20 	pinMode(Port_18B20, INPUT)

#define Set_Port_18B20_High digitalWrite(Port_18B20, HIGH)
#define Set_Port_18B20_Low digitalWrite(Port_18B20, LOW)

#define Read_Port_18B20 digitalRead(Port_18B20)

unsigned char DS18B20_reset();
void DS18B20_write(char WRT);
unsigned char DS18B20_read();

unsigned short tempL = 0;
unsigned short tempH = 0;

void setup()
{
  Serial.begin(9600);
}


void loop()
{
  unsigned int temp = 0;
  float Temperature = 0.0;
  if(!DS18B20_reset())
  {
    DS18B20_write(Skip_ROM);
    DS18B20_write(Convert_T);
    delay(750);
    DS18B20_reset();
    DS18B20_write(Skip_ROM);
    DS18B20_write(Read_scratchpad);
    tempL = DS18B20_read();
    tempH = DS18B20_read();
    temp = ((unsigned int)tempH << 8) + (unsigned int)tempL;
    temp = (float)temp * 6.25;
    Temperature = (float)temp/100; 
    Serial.print("Temperature: ");
    Serial.println(Temperature);
  }
}

unsigned char DS18B20_reset()
{
  Tx_18B20;
  Set_Port_18B20_Low;
  delayMicroseconds(480);
  Rx_18B20;
  delayMicroseconds(60);
 
  if(Read_Port_18B20 == 0)
  {
    delayMicroseconds(480);
    return 0; 
  }
  else
  {
    delayMicroseconds(480);
    return 1; 
  } 
}

void DS18B20_write(char WRT)
{
  char i = 0, Cmd = 0;
  Cmd = WRT;
  Rx_18B20;
  
  for(i = 0; i< 8; i++)
  {
    if((Cmd & (1<<i)) != 0)
    {
      Tx_18B20;
      Set_Port_18B20_Low;
      delayMicroseconds(1);
      Rx_18B20;
      delayMicroseconds(60);
    }
    else
    {
      Tx_18B20;
      Set_Port_18B20_Low;
      delayMicroseconds(60);
      Rx_18B20;      
    }
  }
}

unsigned char DS18B20_read()
{
  char i = 0, result = 0;
  Rx_18B20;
  for(i = 0; i < 8; i++)
  {
    Tx_18B20;
    Set_Port_18B20_Low;
    delayMicroseconds(2);
    Rx_18B20;
    if(Read_Port_18B20 != 0)
      result |= 1<<i;
    delayMicroseconds(60);
  }
  return result;
}</pre>

* 程序效果
[[文件:02S16003.png|500px|缩略图|居中]]

===example2_Arduino===
* 主要硬件
:Arduino UNO 控制器
:传感器扩展板 V5.0
:DS18B20 水温传感器
:IIC1602 LCD 液晶显示器

* 硬件连接
[[文件:02S16005.png|500px|缩略图|居中]]

* 示例程序
<pre style='color:blue'>#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2); 

#define Skip_ROM     0xCC
#define Convert_T     0x44
#define Read_scratchpad         0xBE

#define Port_18B20  7
#define Tx_18B20  pinMode(Port_18B20, OUTPUT)
#define Rx_18B20  pinMode(Port_18B20, INPUT)

#define Set_Port_18B20_High digitalWrite(Port_18B20, HIGH)
#define Set_Port_18B20_Low digitalWrite(Port_18B20, LOW)

#define Read_Port_18B20 digitalRead(Port_18B20)

unsigned char DS18B20_reset();
void DS18B20_write(char WRT);
unsigned char DS18B20_read();

unsigned short tempL = 0;
unsigned short tempH = 0;

void setup()
{
  Serial.begin(9600);
  lcd.init();                   
  lcd.backlight();
}


void loop()
{ 
  unsigned int temp = 0;
  float Temperature = 0.0;
  
  if(!DS18B20_reset())
  {
    DS18B20_write(Skip_ROM);
    DS18B20_write(Convert_T);
    delay(750);
    
    DS18B20_reset();
    DS18B20_write(Skip_ROM);
    DS18B20_write(Read_scratchpad);
    
    tempL = DS18B20_read();
    tempH = DS18B20_read();
    
    temp = ((unsigned int)tempH << 8) + (unsigned int)tempL;
    
    temp = (float)temp * 6.25;
    
    Temperature = (float)temp/100; 
    
    Serial.println(Temperature);

  lcd.setCursor(0, 0);         
  lcd.print("Temperature ="); 
  lcd.setCursor(0,1);
  lcd.print(Temperature);
  lcd.setCursor(6,1);
  lcd.print("Celsius");
  }
}

unsigned char DS18B20_reset()
{
  Tx_18B20;
  Set_Port_18B20_Low;
  delayMicroseconds(480);
  Rx_18B20;
  delayMicroseconds(60);
 
  if(Read_Port_18B20 == 0)
  {
    delayMicroseconds(480);
    return 0; 
  }
  else
  {
    delayMicroseconds(480);
    return 1; 
  } 
}

void DS18B20_write(char WRT)
{
  char i = 0, Cmd = 0;
  Cmd = WRT;
  Rx_18B20;
  
  for(i = 0; i< 8; i++)
  {
    if((Cmd & (1<<i)) != 0)
    {
      Tx_18B20;
      Set_Port_18B20_Low;
      delayMicroseconds(1);
      Rx_18B20;
      delayMicroseconds(60);
    }
    else
    {
      Tx_18B20;
      Set_Port_18B20_Low;
      delayMicroseconds(60);
      Rx_18B20;      
    }
  }
}

unsigned char DS18B20_read()
{
  char i = 0, result = 0;
  Rx_18B20;
  
  for(i = 0; i < 8; i++)
  {
    Tx_18B20;
    Set_Port_18B20_Low;
    delayMicroseconds(2);
    Rx_18B20;
    
    if(Read_Port_18B20 != 0)
      result |= 1<<i;
    
    delayMicroseconds(60);
  }
  
  return result;
}</pre>

* 程序效果
[[文件:02S16006.png|500px|缩略图|居中]]

===example3_arduino===
* 主要硬件
:Arduino UNO 控制器
:传感器扩展板V5.0
:LED发光模块-红/绿/黄
:蜂鸣器发声模块
:继电器模块
:潜水泵
:DC2.1 电源接线端子
:7.4V 1300mAh 锂电池
* 硬件连接
[[文件:02S16007.png|900px|缩略图|居中]]
* 示例程序
<pre style='color:blue'>
#define Skip_ROM         0xCC
#define Convert_T        0x44
#define Read_scratchpad  0xBE

#define Port_18B20  12 //温度传感器
#define Tx_18B20  pinMode(Port_18B20, OUTPUT)
#define Rx_18B20  pinMode(Port_18B20, INPUT)

#define Set_Port_18B20_High digitalWrite(Port_18B20, HIGH)
#define Set_Port_18B20_Low digitalWrite(Port_18B20, LOW)

#define Read_Port_18B20 digitalRead(Port_18B20)

#define LED1 9 //G
#define LED2 10 //Y
#define LED3 11 //R
#define buzzer 7 //蜂鸣器
#define relay 8 //继电器

unsigned char DS18B20_reset();
void DS18B20_write(char WRT);
unsigned char DS18B20_read();

unsigned short tempL = 0;
unsigned short tempH = 0;

void setup()
{
  Serial.begin(9600);
  pinMode(LED1,OUTPUT);
  pinMode(LED2,OUTPUT);
  pinMode(LED3,OUTPUT);
  pinMode(buzzer,OUTPUT);
  pinMode(relay,OUTPUT);
  
  digitalWrite(LED1,LOW);
  digitalWrite(LED2,LOW);
  digitalWrite(LED3,LOW);
  digitalWrite(buzzer,HIGH);
  digitalWrite(relay,LOW);
}


void loop()
{ 
  unsigned int temp = 0;
  float Temperature = 0.0;
  
  if(!DS18B20_reset())
  {
    DS18B20_write(Skip_ROM);
    DS18B20_write(Convert_T);
    delay(50);
    
    DS18B20_reset();
    DS18B20_write(Skip_ROM);
    DS18B20_write(Read_scratchpad);
    
    tempL = DS18B20_read();
    tempH = DS18B20_read();
    
    temp = ((unsigned int)tempH << 8) + (unsigned int)tempL;
    
    temp = (float)temp * 6.25;
    
    Temperature = (float)temp/100; 
    
    Serial.println(Temperature);
    int val = int(Temperature);
    if(val>= 30 && val <= 40)
    {
      digitalWrite(LED1,LOW);
      digitalWrite(LED2,HIGH);
      digitalWrite(LED3,LOW);
      digitalWrite(buzzer,HIGH);
      digitalWrite(relay,LOW);
      }
      else if(val > 40)
      {
      digitalWrite(LED1,LOW);
      digitalWrite(LED2,LOW);
      digitalWrite(LED3,HIGH);
      digitalWrite(buzzer,LOW);
      digitalWrite(relay,HIGH);
       }
  else if(val < 30)
  {
    digitalWrite(LED1,HIGH);
    digitalWrite(LED2,LOW);
    digitalWrite(LED3,LOW);
    digitalWrite(buzzer,HIGH);
    digitalWrite(relay,LOW);
    }
    else
    {
    digitalWrite(LED1,LOW);
    digitalWrite(LED2,LOW);
    digitalWrite(LED3,LOW);
    digitalWrite(buzzer,HIGH);
    digitalWrite(relay,LOW);
  }
  }
}

unsigned char DS18B20_reset()
{
  Tx_18B20;
  Set_Port_18B20_Low;
  delayMicroseconds(480);
  Rx_18B20;
  delayMicroseconds(60);
 
  if(Read_Port_18B20 == 0)
  {
    delayMicroseconds(480);
    return 0; 
  }
  else
  {
    delayMicroseconds(480);
    return 1; 
  } 
}

void DS18B20_write(char WRT)
{
  char i = 0, Cmd = 0;
  Cmd = WRT;
  Rx_18B20;
  for(i = 0; i< 8; i++)
  {
    if((Cmd & (1<<i)) != 0)
    {
      Tx_18B20;
      Set_Port_18B20_Low;
      delayMicroseconds(1);
      Rx_18B20;
      delayMicroseconds(60);
    }
    else
    {
      Tx_18B20;
      Set_Port_18B20_Low;
      delayMicroseconds(60);
      Rx_18B20;      
    }
  }
}

unsigned char DS18B20_read()
{
  char i = 0, result = 0;
  Rx_18B20;
  for(i = 0; i < 8; i++)
  {
    Tx_18B20;
    Set_Port_18B20_Low;
    delayMicroseconds(2);
    Rx_18B20;  
    if(Read_Port_18B20 != 0)
      result |= 1<<i;
    delayMicroseconds(60);
  }
  
  return result;
}</pre>

* 程序效果
此例程可模拟控温系统<br/>
:若水温在大于40摄氏度时，LED 红灯亮起、蜂鸣器发出报警声、水泵开始抽水降温，直到温度降低40摄氏度以下后，停止抽水。
:若水温在30摄氏度和40摄氏度之间时，LED 黄灯亮起、蜂鸣器停止报警、水泵停止抽水。
:若水温在30摄氏度以下时，LED 绿灯亮起、蜂鸣器停止报警、水泵停止抽水。

===example_Raspberry Pi===
* 使用软件
:编程软件：Python 2.7.13
:操作系统：Linux raspberrypi 4.14.50
:前提：PC 端已通过 SSH 软件登陆到 RaspberryPi 控制器

* 主要硬件
:Raspberry Pi 3B+
:16G SD卡
:5V 2.5A 适配器
:杜邦线-公母头
:GPIO 扩展板
:大面包板

* 硬件连接
[[文件:02S16008.png|500px|缩略图|居中]]

* 示例程序
树莓派控制器配置步骤<br/>
1.编辑 config.txt 文件，启用单线接口，默认为 BCM4 接口<br/>
sudo nano /boot/config.txt <br/>
2.加入语句<br/>
dtoverlay=w1-gpio<br/>
3.重新启动树莓派控制器<br/>
sudo reboot<br/>
4.列出 Raspberry Pi 通过 1-Wire 总线（默认为BCM4）发现的设备<br/>
ls /sys/bus/w1/devices/<br/>
如图所示，所列出的 28-xxx 为连接的 1-Wire 设备<br/>
[[文件:02S16009.png|500px|缩略图|居中]]
5.进入设备文件夹，获取温度数值<br/>
cd /sys/bus/w1/devices/28-0213169dceaa<br/>
cat w1_slave<br/>
[[文件:02S16010.png|500px|缩略图|居中]]<br/>

Python 代码<br/>
<pre style='color:blue'>import os
import glob
import time

os.system('modprobe w1-gpio')
os.system('modprobe w1-therm')

base_dir = '/sys/bus/w1/devices/'
device_folder = glob.glob(base_dir + '28*')[0]
device_file = device_folder + '/w1_slave'

def read_temp_raw():
    f = open(device_file, 'r')
    lines = f.readlines()
    f.close()
    return lines

def read_temp():
    lines = read_temp_raw()
    while lines[0].strip()[-3:] != 'YES':
        time.sleep(0.2)
        lines = read_temp_raw()
    equals_pos = lines[1].find('t=')
    if equals_pos != -1:
        temp_string = lines[1][equals_pos+2:]
        temp_c = float(temp_string) / 1000.0
        temp_f = temp_c * 9.0 / 5.0 + 32.0
        return temp_c, temp_f
	
while True:
	print(read_temp())	
	time.sleep(1)

</pre>

* 程序效果
在登陆窗口会打印出当前的水温，分别为摄氏温度和华氏温度
[[文件:02S16011.png|600px|缩略图|居中]]

==相关资料==
[[文件:erweima.png|230px|无框|右]]
* DS18B20 温度传感器 datasheet & 示例程序
下载链接： https://pan.baidu.com/s/1scZ2LKFiCDHJbrT2Se9keg 
提取码：wp3v 
 * 相关资料
[https://datasheets.maximintegrated.com/en/ds/DS18B20.pdf DS18B20 datasheet] <br/>
[https://pinout.xyz/pinout/1_wire W1-GPIO - One-Wire Interface] <br/>
* 产品购买链接：http://www.alsrobot.cn/goods-870.html