{"id":660,"date":"2020-08-13T22:18:12","date_gmt":"2020-08-13T14:18:12","guid":{"rendered":"https:\/\/www.iotch.xyz\/?p=660"},"modified":"2020-08-13T22:18:12","modified_gmt":"2020-08-13T14:18:12","slug":"%e6%a0%91%e8%8e%93%e6%b4%be-dht11-%e6%b8%a9%e6%b9%bf%e5%ba%a6%e4%bc%a0%e6%84%9f%e5%99%a8%e8%af%bb%e5%8f%96-c-%e8%af%ad%e8%a8%80%e7%89%88-2","status":"publish","type":"post","link":"https:\/\/www.iotch.xyz\/?p=660","title":{"rendered":"\u6811\u8393\u6d3e DHT11 \u6e29\u6e7f\u5ea6\u4f20\u611f\u5668\u8bfb\u53d6 C \u8bed\u8a00\u7248"},"content":{"rendered":"\n
\nhttps:\/\/shumeipai.nxez.com\/2020\/05\/19\/raspberry-pi-read-data-from-dht11-sensor-by-c.html\n<\/div><\/figure>\n\n\n\n
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\u6211\u4eec\u4e4b\u524d\u4ecb\u7ecd\u8fc7\u4e09\u79cd\u8bfb\u53d6 DHT11 \u6e29\u6e7f\u5ea6\u4f20\u611f\u5668\u6570\u503c\u7684\u65b9\u6cd5\uff1a\u7528\u7cfb\u7edf\u529f\u80fd\u76f4\u8bfb<\/a>\u3001\u7528 Adafruit \u7684\u5e93\u8bfb\u53d6<\/a>\u3001\u7528 Python \u7f16\u7a0b\u8bfb\u53d6<\/a>\u3002
\u5c3d\u7ba1\u65b9\u6cd5\u5f88\u591a\uff0c\u4f46\u662f\u5728\u4e0d\u540c\u7684\u6811\u8393\u6d3e\u4e0a\u3001\u4f7f\u7528\u4e0d\u540c\u7684\u751f\u4ea7\u5546\u751f\u4ea7\u7684 DHT11 \u6a21\u5757\u65f6\uff0c\u53ef\u80fd\u51fa\u73b0\u8bfb\u51fa\u7684\u6570\u503c\u65e0\u6548\uff0c\u6216\u8005\u76f4\u63a5\u8bfb\u4e0d\u51fa\u7684\u60c5\u51b5\u3002
\u90a3\u4e48\u8fd9\u8fb9\u518d\u591a\u63d0\u4f9b\u4e00\u79cd\u4eb2\u6d4b\u53ef\u7528\u7684 C \u8bed\u8a00\u7248\u672c\u4f9b\u5927\u5bb6\u9009\u62e9\u5c1d\u8bd5\u3002<\/p>\n\n\n\n

\u4f20\u611f\u5668\u8fde\u63a5<\/h4>\n\n\n\n
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Vcc \u5f15\u811a\u63a5 5V
DATA \u5f15\u811a\u63a5 WiringPi \u7f16\u7801 7
GND \u5f15\u811a\u63a5\u6811\u8393\u6d3e\u7684 GND
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\u5b89\u88c5 WiringPi<\/h4>\n\n\n\n

\u8fd9\u91cc\u4f7f\u7528\u4e86 WiringPi \u5e93\uff0c\u5982\u679c\u5df2\u7ecf\u5b89\u88c5\u8fc7\u53ef\u4ee5\u8df3\u8fc7\u8fd9\u4e00\u6b65\u3002<\/p>\n\n\n\n

12345678<\/td>sudo<\/code> apt-get update<\/code>#\u5982\u679c\u4e4b\u524d\u6ca1\u6709\u5b89\u88c5\u8fc7 git\uff0c\u6267\u884c\u4e0b\u9762\u7684\u547d\u4ee4\u5b89\u88c5\u4e00\u4e0b<\/code>sudo<\/code> apt-get <\/code>install<\/code> git-core<\/code>#\u4e0b\u8f7d wiringPi<\/code>git clone https:<\/code>\/\/github<\/code>.com<\/code>\/WiringPi\/WiringPi<\/code>#\u7f16\u8bd1 wiringPi<\/code>cd<\/code> WiringPi<\/code>sudo<\/code> .<\/code>\/build<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u7f16\u7a0b<\/h4>\n\n\n\n

\u6e90\u4ee3\u7801\u5982\u4e0b\uff0c\u4fdd\u5b58\u4e3a dht11.c\u3002<\/p>\n\n\n\n

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899<\/td>#include <wiringPi.h><\/code>#include <stdio.h><\/code>#include <stdlib.h><\/code> typedef<\/code> unsigned <\/code>char<\/code> uint8;<\/code>typedef<\/code> unsigned <\/code>int<\/code>  uint16;<\/code>typedef<\/code> unsigned <\/code>long<\/code> uint32;<\/code> #define HIGH_TIME 32<\/code> int<\/code> pinNumber = 7;<\/code>uint32 databuf;<\/code> uint8 readSensorData(<\/code>void<\/code>)<\/code>{<\/code>uint8 crc; <\/code>uint8 i;<\/code> pinMode(pinNumber, OUTPUT); <\/code>\/\/ set mode to output<\/code>digitalWrite(pinNumber, 0); <\/code>\/\/ output a high level <\/code>delay(25);<\/code>digitalWrite(pinNumber, 1); <\/code>\/\/ output a low level <\/code>pinMode(pinNumber, INPUT); <\/code>\/\/ set mode to input<\/code>pullUpDnControl(pinNumber, PUD_UP);<\/code> delayMicroseconds(27);<\/code>if<\/code> (digitalRead(pinNumber) == 0) <\/code>\/\/SENSOR ANS<\/code>{<\/code>while<\/code> (!digitalRead(pinNumber))<\/code>; <\/code>\/\/wait to high<\/code> for<\/code> (i = 0; i < 32; i++)<\/code>{<\/code>while<\/code> (digitalRead(pinNumber))<\/code>; <\/code>\/\/data clock start<\/code>while<\/code> (!digitalRead(pinNumber))<\/code>; <\/code>\/\/data start<\/code>delayMicroseconds(HIGH_TIME);<\/code>databuf *= 2;<\/code>if<\/code> (digitalRead(pinNumber) == 1) <\/code>\/\/1<\/code>{<\/code>databuf++;<\/code>}<\/code>}<\/code> for<\/code> (i = 0; i < 8; i++)<\/code>{<\/code>while<\/code> (digitalRead(pinNumber))<\/code>; <\/code>\/\/data clock start<\/code>while<\/code> (!digitalRead(pinNumber))<\/code>; <\/code>\/\/data start<\/code>delayMicroseconds(HIGH_TIME);<\/code>crc *= 2;  <\/code>if<\/code> (digitalRead(pinNumber) == 1) <\/code>\/\/1<\/code>{<\/code>crc++;<\/code>}<\/code>}<\/code>return<\/code> 1;<\/code>}<\/code>else<\/code>{<\/code>return<\/code> 0;<\/code>}<\/code>}<\/code> int<\/code> main(<\/code>void<\/code>)<\/code>{<\/code>printf<\/code>(<\/code>\"PIN:%d\\n\"<\/code>, pinNumber);<\/code> if<\/code> (-1 == wiringPiSetup()) {<\/code>printf<\/code>(<\/code>\"Setup wiringPi failed!\"<\/code>);<\/code>return<\/code> 1;<\/code>}<\/code> pinMode(pinNumber, OUTPUT); <\/code>\/\/ set mode to output<\/code>digitalWrite(pinNumber, 1); <\/code>\/\/ output a high level <\/code> printf<\/code>(<\/code>\"Starting...\\n\"<\/code>);<\/code>while<\/code> (1) <\/code>{<\/code>pinMode(pinNumber, OUTPUT); <\/code>\/\/ set mode to output<\/code>digitalWrite(pinNumber, 1); <\/code>\/\/ output a high level <\/code>delay(3000);<\/code>if<\/code> (readSensorData())<\/code>{<\/code>printf<\/code>(<\/code>\"Sensor data read ok!\\n\"<\/code>);<\/code>printf<\/code>(<\/code>\"RH:%d.%d\\n\"<\/code>, (databuf >> 24) & 0xff, (databuf >> 16) & 0xff); <\/code>printf<\/code>(<\/code>\"TMP:%d.%d\\n\"<\/code>, (databuf >> 8) & 0xff, databuf & 0xff);<\/code>databuf = 0;<\/code>}<\/code>else<\/code>{<\/code>printf<\/code>(<\/code>\"Sensor dosent ans!\\n\"<\/code>);<\/code>databuf = 0;<\/code>}<\/code>}<\/code>return<\/code> 0;<\/code>}<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u7f16\u8bd1\u7a0b\u5e8f\u5e76\u8fd0\u884c<\/h4>\n\n\n\n
12<\/td>gcc<\/code> -Wall -o dht11 dht11.c -lwiringPi<\/code>sudo<\/code> .<\/code>\/dht11<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u5ffd\u7565\u7f16\u8bd1\u8fc7\u7a0b\u4e2d\u7684\u8b66\u544a\u3002\u8fd0\u884c\u4e4b\u540e\u5c06\u51fa\u73b0\u6e29\u6e7f\u5ea6\u8bfb\u6570\u3002<\/p>\n\n\n\n

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\u76f8\u5173\u8ba8\u8bba\uff1ahttps:\/\/talk.quwj.com\/topic\/1005<\/a>\u6587\u7ae0\u6807\u9898\uff1a<\/strong>\u6811\u8393\u6d3e DHT11 \u6e29\u6e7f\u5ea6\u4f20\u611f\u5668\u8bfb\u53d6 C \u8bed\u8a00\u7248<\/a> - \u6811\u8393\u6d3e\u5b9e\u9a8c\u5ba4<\/a>\u56fa\u5b9a\u94fe\u63a5\uff1a<\/strong>https:\/\/shumeipai.nxez.com\/2020\/05\/19\/raspberry-pi-read-data-from-dht11-sensor-by-c.html<\/a><\/p>\n