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The project is constantly being updated until the first realise is created. thank you.

dht22-sensor

Created out of the need to monitor atmospheric conditions within a astronomical observatory. The project dht22-sensor is small service to show atmospheric conditions by sensor dht22

Features

  • By http protocol we can see the values in CSV format or in generated graphic.
  • Temperature
  • R.Humidity
  • Dew Point
  • Heat index
  • Weather history

Requirements

  • Raspberry Pi with Raspbian OS
  • Mini Breadboard wire
  • DHT22 Humidity Sensor
  • One 10k ohm resistor (Brown, Black, Orange, Gold)

Hardware Setup

DHT22 sensor pinout

Pin 1 is VCC (Power Supply)
Pin 2 is DATA (Data signal)
Pin 3 is NULL (Do not connect)
Pin 4 is GND (Ground)

Raspberry Pi DHT22 Circuit

Place a 10k resistor between Pin 1 and Pin 2 of the DHT22
Wire Pin 1 of the DHT22 to Physical Pin 1 (3v3) on the Pi 
(for the use of 3v the wire must be equal or less than one meter)
Wire Pin 2 of the DHT22 to Physical Pin 7 (GPIO4) on the Pi
Wire Pin 4 of the DHT22 to Physical Pin 6 (GND) on the Pi

Installation of dht22-sensor project

  1. Install git.
apt-get install git
  1. Clone the dht22-sensor git repository.
git clone https://github.com/ruirigel/dht22-sensor.git
  1. Navigate to the dht22-sensor sub-directory.
cd dht22-sensor/
  1. Run setup.sh to install the relevant software.
  • Note: You may be prompted for a password for sudo.
chmod +x setup.sh

./setup.sh

Manual operation

  1. Start dht22-sensor server.
sudo reboot now
  1. After reboot open the addresses in your browser.
http://localhost:8000/dht22values
http://localhost:8000/plot.png

Congratulations if you seeing this similar result: https://github.com/ruirigel/dht22-sensor/blob/main/plot.png