Raspberry Pi-based weather station

It explores  several different communication ways of connecting sensors to a Raspberry Pi, as:

• DHT22 – Temperature & Humidity Sensor – Digital Comm
• DS18B20 – Temperature Sensor – 1-Wire
• BMP180 – Temperature & Pressure Sensor – I2C
• UV – Ultra Violet Sensor – Analog Sensor via A/D and SPI bus

In short, all data will be captured, saved locally on a CSV file and send to an IoT service (ThingSpeak.com), via MQTT protocol, as you can see on below block diagram:

To complete a real Weather Station, on the final step you will also learn how to measure wind speed and direction, following Mauricio Pinto‘s tutorial.

Supplies:

• Raspberry Pi V3 – US$ 32.00
• DHT22 Temperature and Relative Humidity Sensor – USD 9.95
• Resistor 4K7 ohm
• DS18B20 Waterproof Temperature Sensor – USD 5.95
• Resistor 4K7 ohm
• BMP180 Barometric Pressure, Temperature and Altitude Sensor – USD 6.99
• UV Sensor – USD4.00
• Adafruit MCP3008 8-Channel 10-Bit ADC With SPI Interface – USD 5.98