This module allows you to measure environmental parameters of temperature and humidity using the DHT11 sensor. Additionally ... to using physical computing with sensors on the Raspberry Pi. The ...

To build your very own IoT rain checking system, you will need a Raspberry Pi 3 Model B, a DHT11 Temperature & Humidity Sensor (4 pins), and a raindrop sensing board, which can be purchased for ...

Temperature and humidity measurements are a nice addition ... He decided to take an in-depth look at the DHT11 sensor; which you can get your hands on for under $3 if you know where to look.