# 取得溫濕度 [DHT22(AOSONG AM2302)](https://www.adafruit.com/product/385) 溫濕度元件在GitHub中有提供Raspberry Pi的python的程式讀取溫度與濕度 ## 更新系統套件 執行指令： ``` sudo apt-get update sudo apt-get upgrade ``` ## 接著要安裝所需要的相關套件 執行指令： ``` sudo apt-get install git build-essential python-dev ``` 執行結果： ``` pi@raspberrypi:~ $ sudo apt-get install git build-essential python-dev Reading package lists... Done Building dependency tree Reading state information... Done build-essential is already the newest version (12.3). The following additional packages will be installed: git-man liberror-perl libexpat1-dev libpython-dev libpython2.7 libpython2.7-dev python2.7-dev Suggested packages: git-daemon-run | git-daemon-sysvinit git-doc git-el git-email git-gui gitk gitweb git-arch git-cvs git-mediawiki git-svn The following NEW packages will be installed: git git-man liberror-perl libexpat1-dev libpython-dev libpython2.7 libpython2.7-dev python-dev python2.7-dev 0 upgraded, 9 newly installed, 0 to remove and 0 not upgraded. Need to get 33.7 MB of archives. After this operation, 67.0 MB of additional disk space will be used. Do you want to continue? [Y/n] y Get:1 http://mirror.ossplanet.net/raspbian/raspbian stretch/main armhf liberror-perl all 0.17024-1 [26.9 kB] Get:2 http://mirror.ossplanet.net/raspbian/raspbian stretch/main armhf git-man all 1:2.11.0-3+deb9u2 [1,432 kB] Get:9 http://raspbian.raspberrypi.org/raspbian stretch/main armhf python-dev armhf 2.7.13-2 [1,130 B] Get:3 http://mirror.ossplanet.net/raspbian/raspbian stretch/main armhf git armhf 1:2.11.0-3+deb9u2 [3,380 kB] Get:4 http://mirror.ossplanet.net/raspbian/raspbian stretch/main armhf libexpat1-dev armhf 2.2.0-2+deb9u1 [116 kB] Get:5 http://mirror.ossplanet.net/raspbian/raspbian stretch/main armhf libpython2.7 armhf 2.7.13-2+deb9u2 [914 kB] Get:6 http://mirror.ossplanet.net/raspbian/raspbian stretch/main armhf libpython2.7-dev armhf 2.7.13-2+deb9u2 [27.6 MB] Get:7 http://mirror.ossplanet.net/raspbian/raspbian stretch/main armhf libpython-dev armhf 2.7.13-2 [20.0 kB] Get:8 http://mirror.ossplanet.net/raspbian/raspbian stretch/main armhf python2.7-dev armhf 2.7.13-2+deb9u2 [286 kB] Fetched 33.7 MB in 37s (911 kB/s) Selecting previously unselected package liberror-perl. (Reading database ... 34374 files and directories currently installed.) Preparing to unpack .../0-liberror-perl_0.17024-1_all.deb ... Unpacking liberror-perl (0.17024-1) ... Selecting previously unselected package git-man. Preparing to unpack .../1-git-man_1%3a2.11.0-3+deb9u2_all.deb ... Unpacking git-man (1:2.11.0-3+deb9u2) ... Selecting previously unselected package git. Preparing to unpack .../2-git_1%3a2.11.0-3+deb9u2_armhf.deb ... Unpacking git (1:2.11.0-3+deb9u2) ... Selecting previously unselected package libexpat1-dev:armhf. Preparing to unpack .../3-libexpat1-dev_2.2.0-2+deb9u1_armhf.deb ... Unpacking libexpat1-dev:armhf (2.2.0-2+deb9u1) ... Selecting previously unselected package libpython2.7:armhf. Preparing to unpack .../4-libpython2.7_2.7.13-2+deb9u2_armhf.deb ... Unpacking libpython2.7:armhf (2.7.13-2+deb9u2) ... Selecting previously unselected package libpython2.7-dev:armhf. Preparing to unpack .../5-libpython2.7-dev_2.7.13-2+deb9u2_armhf.deb ... Unpacking libpython2.7-dev:armhf (2.7.13-2+deb9u2) ... Selecting previously unselected package libpython-dev:armhf. Preparing to unpack .../6-libpython-dev_2.7.13-2_armhf.deb ... Unpacking libpython-dev:armhf (2.7.13-2) ... Selecting previously unselected package python2.7-dev. Preparing to unpack .../7-python2.7-dev_2.7.13-2+deb9u2_armhf.deb ... Unpacking python2.7-dev (2.7.13-2+deb9u2) ... Selecting previously unselected package python-dev. Preparing to unpack .../8-python-dev_2.7.13-2_armhf.deb ... Unpacking python-dev (2.7.13-2) ... Setting up git-man (1:2.11.0-3+deb9u2) ... Setting up liberror-perl (0.17024-1) ... Processing triggers for libc-bin (2.24-11+deb9u3) ... Setting up libpython2.7:armhf (2.7.13-2+deb9u2) ... Setting up libexpat1-dev:armhf (2.2.0-2+deb9u1) ... Processing triggers for man-db (2.7.6.1-2) ... Setting up libpython2.7-dev:armhf (2.7.13-2+deb9u2) ... Setting up python2.7-dev (2.7.13-2+deb9u2) ... Setting up git (1:2.11.0-3+deb9u2) ... Setting up libpython-dev:armhf (2.7.13-2) ... Setting up python-dev (2.7.13-2) ... Processing triggers for libc-bin (2.24-11+deb9u3) ... pi@raspberrypi:~ $ ``` ## 下載程式碼 以上所需要的套件安裝完成後，透過git指令把放在github上的程式clone到Raspberry Pi中 執行指令： ``` cd ~ git clone https://github.com/adafruit/Adafruit_Python_DHT.git ``` 執行結果： ``` pi@raspberrypi:~ $ git clone https://github.com/adafruit/Adafruit_Python_DHT.git Cloning into 'Adafruit_Python_DHT'... remote: Counting objects: 249, done. remote: Total 249 (delta 0), reused 0 (delta 0), pack-reused 249 Receiving objects: 100% (249/249), 77.01 KiB | 0 bytes/s, done. Resolving deltas: 100% (142/142), done. ``` ## 安裝Adafruit\_Python\_DHT 執行指令： ``` cd Adafruit_Python_DHT sudo python setup.py install ``` 執行結果： ``` pi@raspberrypi:~/Adafruit_Python_DHT $ sudo python setup.py install Extracting in /tmp/tmphYQXtG Now working in /tmp/tmphYQXtG/setuptools-4.0.1 Building a Setuptools egg in /home/pi/Adafruit_Python_DHT /home/pi/Adafruit_Python_DHT/setuptools-4.0.1-py2.7.egg running install running bdist_egg running egg_info creating Adafruit_DHT.egg-info writing Adafruit_DHT.egg-info/PKG-INFO writing top-level names to Adafruit_DHT.egg-info/top_level.txt writing dependency_links to Adafruit_DHT.egg-info/dependency_links.txt writing manifest file 'Adafruit_DHT.egg-info/SOURCES.txt' reading manifest file 'Adafruit_DHT.egg-info/SOURCES.txt' writing manifest file 'Adafruit_DHT.egg-info/SOURCES.txt' installing library code to build/bdist.linux-armv7l/egg running install_lib running build_py creating build creating build/lib.linux-armv7l-2.7 creating build/lib.linux-armv7l-2.7/Adafruit_DHT copying Adafruit_DHT/Beaglebone_Black.py -> build/lib.linux-armv7l-2.7/Adafruit_DHT copying Adafruit_DHT/Raspberry_Pi.py -> build/lib.linux-armv7l-2.7/Adafruit_DHT copying Adafruit_DHT/Raspberry_Pi_2.py -> build/lib.linux-armv7l-2.7/Adafruit_DHT copying Adafruit_DHT/platform_detect.py -> build/lib.linux-armv7l-2.7/Adafruit_DHT copying Adafruit_DHT/Test.py -> build/lib.linux-armv7l-2.7/Adafruit_DHT copying Adafruit_DHT/__init__.py -> build/lib.linux-armv7l-2.7/Adafruit_DHT copying Adafruit_DHT/common.py -> build/lib.linux-armv7l-2.7/Adafruit_DHT running build_ext building 'Adafruit_DHT.Raspberry_Pi_2_Driver' extension creating build/temp.linux-armv7l-2.7 creating build/temp.linux-armv7l-2.7/source creating build/temp.linux-armv7l-2.7/source/Raspberry_Pi_2 arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -Wdate-time -D_FORTIFY_SOURCE=2 -g -fdebug-prefix-map=/build/python2.7-kKRR4y/python2.7-2.7.13=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/usr/include/python2.7 -c source/_Raspberry_Pi_2_Driver.c -o build/temp.linux-armv7l-2.7/source/_Raspberry_Pi_2_Driver.o -std=gnu99 arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -Wdate-time -D_FORTIFY_SOURCE=2 -g -fdebug-prefix-map=/build/python2.7-kKRR4y/python2.7-2.7.13=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/usr/include/python2.7 -c source/common_dht_read.c -o build/temp.linux-armv7l-2.7/source/common_dht_read.o -std=gnu99 arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -Wdate-time -D_FORTIFY_SOURCE=2 -g -fdebug-prefix-map=/build/python2.7-kKRR4y/python2.7-2.7.13=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/usr/include/python2.7 -c source/Raspberry_Pi_2/pi_2_dht_read.c -o build/temp.linux-armv7l-2.7/source/Raspberry_Pi_2/pi_2_dht_read.o -std=gnu99 arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -Wdate-time -D_FORTIFY_SOURCE=2 -g -fdebug-prefix-map=/build/python2.7-kKRR4y/python2.7-2.7.13=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/usr/include/python2.7 -c source/Raspberry_Pi_2/pi_2_mmio.c -o build/temp.linux-armv7l-2.7/source/Raspberry_Pi_2/pi_2_mmio.o -std=gnu99 arm-linux-gnueabihf-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -Wdate-time -D_FORTIFY_SOURCE=2 -g -fdebug-prefix-map=/build/python2.7-kKRR4y/python2.7-2.7.13=. -fstack-protector-strong -Wformat -Werror=format-security -Wl,-z,relro -Wdate-time -D_FORTIFY_SOURCE=2 -g -fdebug-prefix-map=/build/python2.7-kKRR4y/python2.7-2.7.13=. -fstack-protector-strong -Wformat -Werror=format-security build/temp.linux-armv7l-2.7/source/_Raspberry_Pi_2_Driver.o build/temp.linux-armv7l-2.7/source/common_dht_read.o build/temp.linux-armv7l-2.7/source/Raspberry_Pi_2/pi_2_dht_read.o build/temp.linux-armv7l-2.7/source/Raspberry_Pi_2/pi_2_mmio.o -lrt -o build/lib.linux-armv7l-2.7/Adafruit_DHT/Raspberry_Pi_2_Driver.so creating build/bdist.linux-armv7l creating build/bdist.linux-armv7l/egg creating build/bdist.linux-armv7l/egg/Adafruit_DHT copying build/lib.linux-armv7l-2.7/Adafruit_DHT/Beaglebone_Black.py -> build/bdist.linux-armv7l/egg/Adafruit_DHT copying build/lib.linux-armv7l-2.7/Adafruit_DHT/Raspberry_Pi.py -> build/bdist.linux-armv7l/egg/Adafruit_DHT copying build/lib.linux-armv7l-2.7/Adafruit_DHT/Raspberry_Pi_2.py -> build/bdist.linux-armv7l/egg/Adafruit_DHT copying build/lib.linux-armv7l-2.7/Adafruit_DHT/Raspberry_Pi_2_Driver.so -> build/bdist.linux-armv7l/egg/Adafruit_DHT copying build/lib.linux-armv7l-2.7/Adafruit_DHT/platform_detect.py -> build/bdist.linux-armv7l/egg/Adafruit_DHT copying build/lib.linux-armv7l-2.7/Adafruit_DHT/Test.py -> build/bdist.linux-armv7l/egg/Adafruit_DHT copying build/lib.linux-armv7l-2.7/Adafruit_DHT/__init__.py -> build/bdist.linux-armv7l/egg/Adafruit_DHT copying build/lib.linux-armv7l-2.7/Adafruit_DHT/common.py -> build/bdist.linux-armv7l/egg/Adafruit_DHT byte-compiling build/bdist.linux-armv7l/egg/Adafruit_DHT/Beaglebone_Black.py to Beaglebone_Black.pyc byte-compiling build/bdist.linux-armv7l/egg/Adafruit_DHT/Raspberry_Pi.py to Raspberry_Pi.pyc byte-compiling build/bdist.linux-armv7l/egg/Adafruit_DHT/Raspberry_Pi_2.py to Raspberry_Pi_2.pyc byte-compiling build/bdist.linux-armv7l/egg/Adafruit_DHT/platform_detect.py to platform_detect.pyc byte-compiling build/bdist.linux-armv7l/egg/Adafruit_DHT/Test.py to Test.pyc byte-compiling build/bdist.linux-armv7l/egg/Adafruit_DHT/__init__.py to __init__.pyc byte-compiling build/bdist.linux-armv7l/egg/Adafruit_DHT/common.py to common.pyc creating stub loader for Adafruit_DHT/Raspberry_Pi_2_Driver.so byte-compiling build/bdist.linux-armv7l/egg/Adafruit_DHT/Raspberry_Pi_2_Driver.py to Raspberry_Pi_2_Driver.pyc creating build/bdist.linux-armv7l/egg/EGG-INFO copying Adafruit_DHT.egg-info/PKG-INFO -> build/bdist.linux-armv7l/egg/EGG-INFO copying Adafruit_DHT.egg-info/SOURCES.txt -> build/bdist.linux-armv7l/egg/EGG-INFO copying Adafruit_DHT.egg-info/dependency_links.txt -> build/bdist.linux-armv7l/egg/EGG-INFO copying Adafruit_DHT.egg-info/top_level.txt -> build/bdist.linux-armv7l/egg/EGG-INFO writing build/bdist.linux-armv7l/egg/EGG-INFO/native_libs.txt zip_safe flag not set; analyzing archive contents... creating dist creating 'dist/Adafruit_DHT-1.3.2-py2.7-linux-armv7l.egg' and adding 'build/bdist.linux-armv7l/egg' to it removing 'build/bdist.linux-armv7l/egg' (and everything under it) Processing setuptools-4.0.1-py2.7.egg Copying setuptools-4.0.1-py2.7.egg to /usr/local/lib/python2.7/dist-packages Adding setuptools 4.0.1 to easy-install.pth file Installing easy_install script to /usr/local/bin Installing easy_install-2.7 script to /usr/local/bin Installed /usr/local/lib/python2.7/dist-packages/setuptools-4.0.1-py2.7.egg Processing dependencies for setuptools==4.0.1 Finished processing dependencies for setuptools==4.0.1 Processing Adafruit_DHT-1.3.2-py2.7-linux-armv7l.egg Copying Adafruit_DHT-1.3.2-py2.7-linux-armv7l.egg to /usr/local/lib/python2.7/dist-packages Adding Adafruit-DHT 1.3.2 to easy-install.pth file Installed /usr/local/lib/python2.7/dist-packages/Adafruit_DHT-1.3.2-py2.7-linux-armv7l.egg Processing dependencies for Adafruit-DHT==1.3.2 Finished processing dependencies for Adafruit-DHT==1.3.2 ``` ## 取得溫濕度 執行指令： ``` cd examples sudo ./AdafruitDHT.py 2302 4 ``` 執行結果： ``` pi@raspberrypi:~/Adafruit_Python_DHT $ cd examples/ pi@raspberrypi:~/Adafruit_Python_DHT/examples $ sudo ./AdafruitDHT.py 2302 4 Temp=26.6* Humidity=85.2% ``` 所顯示的Temp就是目前所讀取到的溫度，而Humidity就是濕度 --- # Agent Instructions: Querying This Documentation If 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