使用树莓派+DHT-22温湿度传感器+微雪4.3寸电子墨水屏搭建的天气时钟.zip

# e-Paper Weather Clock Use RaspberryPi, DHT-22 humidity & temperature sensor, and WeShare 4.3 inch e-Paper screen, refered by https://github.com/emptyhua/epaper_clock ## Finished Product  ## Hardware Connection RaspberryPi 3B's GPIO | BCM | wPi |   Name | Mode | V | Physical ||Physical | V | Mode | Name   | wPi | BCM | |:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:| |     |     |3.3v |     |   | 1 || 2|   |     | 5v|     |     | | 2 | 8 | SDA.1 | IN | 1 | 3 || 4 | | | 5v | | | | 3 | 9 | SCL.1 | IN | 1 | 5 || 6 | | | 0v | | | | 4 | 7 | GPIO. 7 | IN | 1 | 7 || 8 | 1 | ALT5 | TxD | 15 | 14 | | | | 0v | | | 9 || 10 | 1 | ALT5 | RxD | 16 | 15 | | 17 | 0 | GPIO. 0 | IN | 0 | 11 || 12 | 0 | IN | GPIO. 1 | 1 | 18 | | 27 | 2 | GPIO. 2 | IN | 0 | 13 || 14 | | | 0v | | | | 22 | 3 | GPIO. 3 | IN | 0 | 15 || 16 | 0 | IN | GPIO. 4 | 4 | 23 | | | | 3.3v | | | 17 || 18 | 0 | IN | GPIO. 5 | 5 | 24 | | 10 | 12 | MOSI | ALT0 | 0 | 19 || 20 | | | 0v | | | | 9 | 13 | MISO | ALT0 | 0 | 21 || 22 | 0 | IN | GPIO. 6 | 6 | 25 | | 11 | 14 | SCLK | ALT0 | 0 | 23 || 24 | 1 | OUT | CE0 | 10 | 8 | | | | 0v | | | 25 || 26 | 1 | OUT | CE1 | 11 | 7 | | 0 | 30 | SDA.0 | IN | 1 | 27 || 28 | 1 | IN | SCL.0 | 31 | 1 | | 5 | 21 | GPIO.21 | IN | 1 | 29 || 30 | | | 0v | | | | 6 | 22 | GPIO.22 | IN | 1 | 31 || 32 | 0 | IN | GPIO.26 | 26 | 12 | | 13 | 23 | GPIO.23 | IN | 0 | 33 || 34 | | | 0v | | | | 19 | 24 | GPIO.24 | OUT | 1 | 35 || 36 | 1 | OUT | GPIO.27 | 27 | 16 | | 26 | 25 | GPIO.25 | IN | 0 | 37 || 38 | 0 | IN | GPIO.28 | 28 | 20 | | | | 0v | | | 39 || 40 | 0 | IN | GPIO.29 | 29 | 21 | Connect to e-Paper screen |E-Paper Screen | Raspberry Pi | |:-:|:-:| | VCC | 3.3 | | GND | GND | | DIN | MOSI | | CLK | SCLK | | CS | 24 (Physical, BCM: CE0, 8) | | D/C | 22 (Physical, BCM: 25) | | RES | 11 (Physical, BCM: 17) | | BUSY| 18 (Physical, BCM: 24) | Connect to DHT-22 sensor |DHT22|Raspberry Pi| |:-:|:-:| |DOUT|GPIO7(BCM4)| You can connect DHT-22's DOUT to RaspberryPi's other GPIO, as long as modify the second parameter of Adafruit_DHT.read function in main.py ## Install Python Library Install the following python library - RPi.GPIO - spidev - requests - lxml - Python Image Library(pillow) ## Install DHT-22 driver ``` git clone https://github.com/adafruit/Adafruit_Python_DHT.git cd Adafruit_Python_DHT sudo python ./setup.py install ``` ## Usage 1. Connect all wires 2. Install all libraries or environments needed 3. Run main.py ### How to set auto-start? Added script in /etc/rc.local(may not stable), or use systemd(recommend), following these steps: 1. Write a epaper_clock.service script ``` [Unit] Description=epaper_clock [Service] Type=oneshot ExecStart=#####(path of your own script)####### [Install] WantedBy=multi-user.target ``` 2. Copy this script to /etc/systemd/system/multi-user.target.wants/ floder，and modify file authority using：chmod +x 3. Start service: systemctl start epaper_clock.service 4. Check sevice status: systemctl status epaper_clock.service 5. Stop sevice: systemctl stop epaper_clock.service ## FAQ 1. weather source may invalid, try to change another one 2. network problem ———————————————————————————————————————————————————————————————————— # 电子墨水屏天气时钟 使用树莓派 + DHT22温湿度传感器 + 微雪4.3寸电子墨水屏搭建的天气时钟，参考了 https://github.com/emptyhua/epaper_clock 的创意。 ## 效果图  ## 硬件连接 树莓派3B GPIO接口图 | BCM | wPi |   Name | Mode | V | Physical ||Physical | V | Mode | Name   | wPi | BCM | |:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:| |     |     |3.3v |     |   | 1 || 2|   |     | 5v|     |     | | 2 | 8 | SDA.1 | IN | 1 | 3 || 4 | | | 5v | | | | 3 | 9 | SCL.1 | IN | 1 | 5 || 6 | | | 0v | | | | 4 | 7 | GPIO. 7 | IN | 1 | 7 || 8 | 1 | ALT5 | TxD | 15 | 14 | | | | 0v | | | 9 || 10 | 1 | ALT5 | RxD | 16 | 15 | | 17 | 0 | GPIO. 0 | IN | 0 | 11 || 12 | 0 | IN | GPIO. 1 | 1 | 18 | | 27 | 2 | GPIO. 2 | IN | 0 | 13 || 14 | | | 0v | | | | 22 | 3 | GPIO. 3 | IN | 0 | 15 || 16 | 0 | IN | GPIO. 4 | 4 | 23 | | | | 3.3v | | | 17 || 18 | 0 | IN | GPIO. 5 | 5 | 24 | | 10 | 12 | MOSI | ALT0 | 0 | 19 || 20 | | | 0v | | | | 9 | 13 | MISO | ALT0 | 0 | 21 || 22 | 0 | IN | GPIO. 6 | 6 | 25 | | 11 | 14 | SCLK | ALT0 | 0 | 23 || 24 | 1 | OUT | CE0 | 10 | 8 | | | | 0v | | | 25 || 26 | 1 | OUT | CE1 | 11 | 7 | | 0 | 30 | SDA.0 | IN | 1 | 27 || 28 | 1 | IN | SCL.0 | 31 | 1 | | 5 | 21 | GPIO.21 | IN | 1 | 29 || 30 | | | 0v | | | | 6 | 22 | GPIO.22 | IN | 1 | 31 || 32 | 0 | IN | GPIO.26 | 26 | 12 | | 13 | 23 | GPIO.23 | IN | 0 | 33 || 34 | | | 0v | | | | 19 | 24 | GPIO.24 | OUT | 1 | 35 || 36 | 1 | OUT | GPIO.27 | 27 | 16 | | 26 | 25 | GPIO.25 | IN | 0 | 37 || 38 | 0 | IN | GPIO.28 | 28 | 20 | | | | 0v | | | 39 || 40 | 0 | IN | GPIO.29 | 29 | 21 | 与4.3寸电子墨水屏幕的连接 |E-Paper Screen | Raspberry Pi | |:-:|:-:| | VCC | 3.3 | | GND | GND | | DIN | MOSI | | CLK | SCLK | | CS | 24 (Physical, BCM: CE0, 8) | | D/C | 22 (Physical, BCM: 25) | | RES | 11 (Physical, BCM: 17) | | BUSY| 18 (Physical, BCM: 24) | 与DHT-22传感器的连接 |DHT22|Raspberry Pi| |:-:|:-:| |DOUT|GPIO7(BCM4)| DHT-22 DOUT引脚也可以接到其他GPIO脚上，不过要相应的修改main.py中Adafruit_DHT.read函数第二个参数 ## Python库 安装以下库文件 - RPi.GPIO - spidev - requests - lxml - Python Image Library(pillow) DHT22，安装厂商开源的驱动 ``` git clone https://github.com/adafruit/Adafruit_Python_DHT.git cd Adafruit_Python_DHT sudo python ./setup.py install ``` ## 使用方法 1. 接好线 2. 安装必须的环境和库 3. 运行main.py ### 如何脚本设置开机启动？ 方法一：在/etc/rc.local中添加执行脚本。不太稳定，经常会出现各种奇怪的情况。 方法二：使用systemd（推荐） 1. 编写epaper_clock.service脚本 ``` [Unit] Description=epaper_clock [Service] Type=oneshot ExecStart=#####(path of your own script)####### [Install] WantedBy=multi-user.target ``` 2. 将脚本拷贝到/etc/systemd/system/multi-user.target.wants/目录下，并修改文件执行权限：chmod +x 3. 启动服务 systemctl start epaper_clock.service 4. 查看服务状态 systemctl status epaper_clock.service 5. 停止服务 systemctl stop epaper_clock.service ## 常见问题 FAQ 1. 天气源失效，尝试换抓取页面或天气API 2. 网络连接问题