Raspberry PI Weather Station

This code is for a Raspberry PI Zero Wireless based weather station for measuring temperature, humidity and pressure. The data will be uploaded and displayed on the Weather Underground weather service https://www.wunderground.com

• Raspberry PI Zero Wireless (the code should work on most if not all PI models)
• DHT22 humidity sensor
• BME280 pressure sensor (the one I use does not provide humidity capability)
• Raspbian: Linux raspberrypi 4.9.35 #1014 Fri Jun 30 14:34:49 BST 2017 armv6l GNU/Linux
• Python version: 2.7.9

DHT22: https://github.com/adafruit/Adafruit_Python_DHT
BME280: https://github.com/adafruit/Adafruit_Python_BME280

DHT22: The Data Pin (normally pin 2) should be connected to PI GPIO 17 (pin 11).
BME280: The Data Pins SDA pin should be connected to PI GPIO 2 (pin 3) and SCL to GPIO 3 (pin 5).

1. Install Raspbian, enable SSH and I2C and connect it to a network.

2. Install the sensor drivers for both DHT22 and BME280 under /home/pi and as user PI.

3. Install this package: git clone https://github.com/SWhardfish/PIWstation.git

4. Move the downloaded AdafruitDHT.py from /home/pi to /home/pi/Adafruit_Python_DHT which contains modifications to the output format of the DHT22 sensor reading.

5. Move the downloaded Adafruit_BME280_Example.py from /home/pi to /home/pi/Adafruit_Python_GPIO which contains modifications to the output format of the BME280 sensor reading.

6. Create a user (free) at Weather Underground https://www.wunderground.com/signup.

7. Add a Personal Weather Stations and record the Station ID and Station Key.

8. Add Station ID and Station Key to the config.py file under /home/pi.

9. Add the following line * * * * * /home/pi/PIWstation.py the Crontab by typing crontab -e. It will read the sensors and upload the readings to Weather Underground every one minute.

10. Go to your Weather Underground personal weather station url and enjoy the uploaded sensor readings.

To Tony DiCola (Adafruit Industries) for providing the sensor drivers.