Interfacing a temperature humidity sensor using bit-banging
Digital temperature and humidity sensors are quite common in the Internet of Things world. They are rather inexpensive and provide an easy way to record accurate temperature and humidity readings. Using a technique called "bit-banging," we can retrieve a digital signal that will tell our Raspberry Pi Zero both the temperature and relative humidity.
Getting ready
All you'll need is a digital temperature and humidity sensor and a 10 KOhm resistor. There is one included in the Elego kit, and most of the ones you'll find online operate the same way.
To test the device, I used the pydht2 tool in the Python library, installed using sudo pip install pydht2.
How to do it...
- Connect your sensor to the Raspberry Pi Zero, as shown here:
Note
A lot of Digital Sensors expect and provide 5 Volts for input and output, respectively. Check your sensor's data sheet to find out what voltages are supported. If you have a 5V sensor...
