“(SKU:RB-02S020)DS18B20数字温度传感器”的版本间的差异
来自ALSROBOT WiKi
第18行: | 第18行: | ||
* -:地(GND) | * -:地(GND) | ||
− | |||
− | |||
==应用例程 == | ==应用例程 == | ||
我们使用Arduino控制器来做个测试,要用到硬件设备如下: | 我们使用Arduino控制器来做个测试,要用到硬件设备如下: | ||
第27行: | 第25行: | ||
# 通用3P传感器连接线×1 | # 通用3P传感器连接线×1 | ||
# USB 数据通信线×1 | # USB 数据通信线×1 | ||
− | :如图所示,使用传感器连接线将DS18B20 | + | :如图所示,使用传感器连接线将DS18B20 温度传感器连接到Arduino传感器扩展板的数字接口。先把下载的库文件解压缩到你的Arduino安装目录下的hardware\libraries 里面。然后将代码编译后下载到Arduino里,就可以在串口助手窗口上显示测得的当前值。 |
− | === | + | |
− | <pre style='color:blue'>#include < | + | ===示例1=== |
− | DallasTemperature | + | 实物接线图 |
− | void setup(void) | + | [[文件:ds18b20jiexiantu01.jpg|700px|有框|居中]] |
+ | <pre style='color:blue'> | ||
+ | #include <OneWire.h> | ||
+ | #include <DallasTemperature.h> | ||
+ | |||
+ | // 定义DS18B20数据口连接arduino的2号IO上 | ||
+ | #define ONE_WIRE_BUS 2 | ||
+ | |||
+ | // 初始连接在单总线上的单总线设备 | ||
+ | OneWire oneWire(ONE_WIRE_BUS); | ||
+ | DallasTemperature sensors(&oneWire); | ||
+ | |||
+ | void setup(void) | ||
+ | { | ||
+ | // 设置串口通信波特率 | ||
+ | Serial.begin(9600); | ||
+ | Serial.println("Dallas Temperature IC Control Library Demo"); | ||
+ | |||
+ | // 初始库 | ||
+ | sensors.begin(); | ||
+ | } | ||
+ | |||
+ | void loop(void) | ||
{ | { | ||
− | Serial. | + | Serial.print("Requesting temperatures..."); |
− | + | sensors.requestTemperatures(); // 发送命令获取温度 | |
− | } | + | Serial.println("DONE"); |
− | void loop(void) | + | |
− | + | Serial.print("Temperature for the device 1 (index 0) is: "); | |
− | + | Serial.println(sensors.getTempCByIndex(0)); | |
− | + | } | |
− | { | + | </pre> |
− | + | ||
− | + | ===示例代码2=== | |
− | + | 实物接线图 | |
− | + | [[文件:ds18b20jiexiantu02.jpg|700px|有框|居中]] | |
− | + | <pre style='color:blue'> | |
− | + | #include <OneWire.h> | |
− | + | OneWire ds(10); // 连接arduino10引脚 | |
− | + | ||
− | } | + | void setup(void) { |
− | // | + | Serial.begin(9600); |
− | Serial.print( | + | } |
− | Serial.print(" | + | |
− | Serial.println(); | + | void loop(void) { |
− | } </pre> | + | byte i; |
+ | byte present = 0; | ||
+ | byte type_s; | ||
+ | byte data[12]; | ||
+ | byte addr[8]; | ||
+ | float celsius, fahrenheit; | ||
+ | |||
+ | if ( !ds.search(addr)) { | ||
+ | Serial.println("No more addresses."); | ||
+ | Serial.println(); | ||
+ | ds.reset_search(); | ||
+ | delay(250); | ||
+ | return; | ||
+ | } | ||
+ | |||
+ | Serial.print("ROM ="); | ||
+ | for( i = 0; i < 8; i++) { | ||
+ | Serial.write(' '); | ||
+ | Serial.print(addr[i], HEX); | ||
+ | } | ||
+ | |||
+ | if (OneWire::crc8(addr, 7) != addr[7]) { | ||
+ | Serial.println("CRC is not valid!"); | ||
+ | return; | ||
+ | } | ||
+ | Serial.println(); | ||
+ | |||
+ | // the first ROM byte indicates which chip | ||
+ | switch (addr[0]) { | ||
+ | case 0x10: | ||
+ | Serial.println(" Chip = DS18S20"); // or old DS1820 | ||
+ | type_s = 1; | ||
+ | break; | ||
+ | case 0x28: | ||
+ | Serial.println(" Chip = DS18B20"); | ||
+ | type_s = 0; | ||
+ | break; | ||
+ | case 0x22: | ||
+ | Serial.println(" Chip = DS1822"); | ||
+ | type_s = 0; | ||
+ | break; | ||
+ | default: | ||
+ | Serial.println("Device is not a DS18x20 family device."); | ||
+ | return; | ||
+ | } | ||
+ | |||
+ | ds.reset(); | ||
+ | ds.select(addr); | ||
+ | ds.write(0x44,1); // start conversion, with parasite power on at the end | ||
+ | |||
+ | delay(1000); // maybe 750ms is enough, maybe not | ||
+ | // we might do a ds.depower() here, but the reset will take care of it. | ||
+ | |||
+ | present = ds.reset(); | ||
+ | ds.select(addr); | ||
+ | ds.write(0xBE); // Read Scratchpad | ||
+ | |||
+ | Serial.print(" Data = "); | ||
+ | Serial.print(present,HEX); | ||
+ | Serial.print(" "); | ||
+ | for ( i = 0; i < 9; i++) { // we need 9 bytes | ||
+ | data[i] = ds.read(); | ||
+ | Serial.print(data[i], HEX); | ||
+ | Serial.print(" "); | ||
+ | } | ||
+ | Serial.print(" CRC="); | ||
+ | Serial.print(OneWire::crc8(data, 8), HEX); | ||
+ | Serial.println(); | ||
+ | |||
+ | // convert the data to actual temperature | ||
+ | |||
+ | unsigned int raw = (data[1] << 8) | data[0]; | ||
+ | if (type_s) { | ||
+ | raw = raw << 3; // 9 bit resolution default | ||
+ | if (data[7] == 0x10) { | ||
+ | // count remain gives full 12 bit resolution | ||
+ | raw = (raw & 0xFFF0) + 12 - data[6]; | ||
+ | } | ||
+ | } else { | ||
+ | byte cfg = (data[4] & 0x60); | ||
+ | if (cfg == 0x00) raw = raw << 3; // 9 bit resolution, 93.75 ms | ||
+ | else if (cfg == 0x20) raw = raw << 2; // 10 bit res, 187.5 ms | ||
+ | else if (cfg == 0x40) raw = raw << 1; // 11 bit res, 375 ms | ||
+ | // default is 12 bit resolution, 750 ms conversion time | ||
+ | } | ||
+ | celsius = (float)raw / 16.0; | ||
+ | fahrenheit = celsius * 1.8 + 32.0; | ||
+ | Serial.print(" Temperature = "); | ||
+ | Serial.print(celsius); | ||
+ | Serial.print(" Celsius, "); | ||
+ | Serial.print(fahrenheit); | ||
+ | Serial.println(" Fahrenheit"); | ||
+ | } | ||
+ | </pre> | ||
===程序效果=== | ===程序效果=== | ||
− | + | 下载程序后可以通过Arduino软件的串口查看DS18B20检测的环境温度。 | |
==产品相关推荐== | ==产品相关推荐== | ||
− | + | 购买地址: [http://www.alsrobot.cn/goods.php?id=161 DS18B20数字温度传感器] | |
+ | 论坛地址:[http://www.makerspace.cn/portal.php 奥松机器人技术论坛] |
2015年6月23日 (二) 21:46的版本
目录 |
产品概述
2014年最新推出的DS18B20数字温度传感器采用美国DALLAS公司生产的DS18B20一总线数字温度感测元件其测温范围 -55℃~+125℃,固有测温分辨率0.5℃,支持多点组网功能,多个DS18B20可以并联在唯一的三线上,实现多点测温,测量结果以9~12位数字量方式串行传送。 DS18B20数字温度传感器可在各种单片机控制器上应用,尤其在Arduino控制器上更为简单,现成库函数调用,即可完成温度测量,通过3P传感器连接线插接到Arduino专用传感器扩展板上,可以非常容易地实现与环境温度感知相关的互动作品。
规格参数
- 类型:数字模块(一总线接口)
- 可用于检测周围空气温度
- 温度测量范围:-55℃~+125℃
- 测量精度:±0.5 °C(-10 °C至+85 °C范围内)
- 9位~12位A/D转换精度
- 分辨率:0.5℃
- 供电电压:3.3V或5V
使用方法
引脚定义
- S:输出信号
- +:电源(VCC)
- -:地(GND)
应用例程
我们使用Arduino控制器来做个测试,要用到硬件设备如下:
- Arduino控制器×1
- Arduino 传感器扩展板×1
- DS18B20 温度传感器模块×1
- 通用3P传感器连接线×1
- USB 数据通信线×1
- 如图所示,使用传感器连接线将DS18B20 温度传感器连接到Arduino传感器扩展板的数字接口。先把下载的库文件解压缩到你的Arduino安装目录下的hardware\libraries 里面。然后将代码编译后下载到Arduino里,就可以在串口助手窗口上显示测得的当前值。
示例1
实物接线图
#include <OneWire.h> #include <DallasTemperature.h> // 定义DS18B20数据口连接arduino的2号IO上 #define ONE_WIRE_BUS 2 // 初始连接在单总线上的单总线设备 OneWire oneWire(ONE_WIRE_BUS); DallasTemperature sensors(&oneWire); void setup(void) { // 设置串口通信波特率 Serial.begin(9600); Serial.println("Dallas Temperature IC Control Library Demo"); // 初始库 sensors.begin(); } void loop(void) { Serial.print("Requesting temperatures..."); sensors.requestTemperatures(); // 发送命令获取温度 Serial.println("DONE"); Serial.print("Temperature for the device 1 (index 0) is: "); Serial.println(sensors.getTempCByIndex(0)); }
示例代码2
实物接线图
#include <OneWire.h> OneWire ds(10); // 连接arduino10引脚 void setup(void) { Serial.begin(9600); } void loop(void) { byte i; byte present = 0; byte type_s; byte data[12]; byte addr[8]; float celsius, fahrenheit; if ( !ds.search(addr)) { Serial.println("No more addresses."); Serial.println(); ds.reset_search(); delay(250); return; } Serial.print("ROM ="); for( i = 0; i < 8; i++) { Serial.write(' '); Serial.print(addr[i], HEX); } if (OneWire::crc8(addr, 7) != addr[7]) { Serial.println("CRC is not valid!"); return; } Serial.println(); // the first ROM byte indicates which chip switch (addr[0]) { case 0x10: Serial.println(" Chip = DS18S20"); // or old DS1820 type_s = 1; break; case 0x28: Serial.println(" Chip = DS18B20"); type_s = 0; break; case 0x22: Serial.println(" Chip = DS1822"); type_s = 0; break; default: Serial.println("Device is not a DS18x20 family device."); return; } ds.reset(); ds.select(addr); ds.write(0x44,1); // start conversion, with parasite power on at the end delay(1000); // maybe 750ms is enough, maybe not // we might do a ds.depower() here, but the reset will take care of it. present = ds.reset(); ds.select(addr); ds.write(0xBE); // Read Scratchpad Serial.print(" Data = "); Serial.print(present,HEX); Serial.print(" "); for ( i = 0; i < 9; i++) { // we need 9 bytes data[i] = ds.read(); Serial.print(data[i], HEX); Serial.print(" "); } Serial.print(" CRC="); Serial.print(OneWire::crc8(data, 8), HEX); Serial.println(); // convert the data to actual temperature unsigned int raw = (data[1] << 8) | data[0]; if (type_s) { raw = raw << 3; // 9 bit resolution default if (data[7] == 0x10) { // count remain gives full 12 bit resolution raw = (raw & 0xFFF0) + 12 - data[6]; } } else { byte cfg = (data[4] & 0x60); if (cfg == 0x00) raw = raw << 3; // 9 bit resolution, 93.75 ms else if (cfg == 0x20) raw = raw << 2; // 10 bit res, 187.5 ms else if (cfg == 0x40) raw = raw << 1; // 11 bit res, 375 ms // default is 12 bit resolution, 750 ms conversion time } celsius = (float)raw / 16.0; fahrenheit = celsius * 1.8 + 32.0; Serial.print(" Temperature = "); Serial.print(celsius); Serial.print(" Celsius, "); Serial.print(fahrenheit); Serial.println(" Fahrenheit"); }
程序效果
下载程序后可以通过Arduino软件的串口查看DS18B20检测的环境温度。
产品相关推荐
购买地址: DS18B20数字温度传感器 论坛地址:奥松机器人技术论坛