To provide our dashboard data, we will create a new Python file called SecurityData.py
where we will store the SecurityData
class. Before we do that, let's build our circuit.
We will build our first version of the home security dashboard with a DHT11 temperature and humidity sensor, a PIR sensor, and a latching button (or key switch). The following is the Fritzing diagram for our home security dashboard:
The circuit connects as follows:
- GND from DHT11 to GND
- VCC on DHT11 to 5V DC
- Signal on the DHT11 to GPIO pin 19
- GND from PIR sensor to GND
- VCC on PIR sensor to 5V DC
- Signal on PIR sensor to GPIO pin4
- One end of the latching button to GPIO pin 8
- The other end of the latching button to GND
- Pi camera module to CSI port (not shown)
Following is a photo of our circuit. One thing to note is the separate breadboard for our DHT11 sensor (easier to fit on a micro breadboard), as well as the key switch in place of a latching...