Turn Raspberry Pi into temperature and humidity logging station with DHT11 sensor

#Electrical diagram

• BCM2835 C Library
• python
• php5 with SQLite3 enabled
• SQLite3
• any web server: nginx recomended

• Do electrical stuff like showed on diagram. It's really simple
• check if you have SQLite3 PHP library. If not, or not sure, install it sudo apt-get install php5-sqlite3
• check if you have BCM2835 C Library installed. If not, setup instruction is in the next paragraph
• clone this repository git clone https://github.com/DzikuVx/raspberry_temperature_log.git
• cd raspberry_temperature_log
• build sensor driver sh build_sensor.sh
• check if sensors are working python get_data.py
• add following line to cron (with crontab -e), it will get save data do database every 20 minutes: */20 * * * * sudo python /home/pi/raspberry_temperature_log/get_data.py
• configure Raspberry Pi web server, example configuration for nginx, PHP5-FMP and domain http://temperature.spychalski.info included below
• that's all

• wget http://www.open.com.au/mikem/bcm2835/bcm2835-1.8.tar.gz
• tar -zxvf bcm2835-1.8.tar.gz
• cd bcm2835-1.8
• ./configure
• make
• sudo make install

server {
  listen 0.0.0.0:80;

  server_name temperature.spychalski.info;

  access_log off;

  root /home/pi/raspberry_temperature_log/website;
  index index.php;

  # default try order
  location / {
    try_files $uri $uri/ /index.php?$args;
  }

  # enable php
  location ~ \.php$ {
    fastcgi_pass unix:/var/run/php5-fpm.sock;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    include fastcgi_params;
  }
}

sensor_driver.c readout is based on https://github.com/adafruit/Adafruit-Raspberry-Pi-Python-Code/tree/master/Adafruit_DHT_Driver by Adafruit