stirkac / smart_garden Goto Github PK

This Rails application is used to provide temperature and humidity logging as JSON API from Raspberry Pi equipped with DHT22 (AM2302) temperature sensor.

Things you need:

• Raspberry Pi

• DHT22 sensor connected to GPIO pin 4

• Debian and Ruby on Rails installed on SD card

• PostgreSQL

• Installed bcm2835 lib from: www.airspayce.com/mikem/bcm2835

Setup (on your Raspberry PI):

• “git clone” this repository in /home/pi/Projects/ or any other directory (but change config/schedule.rb accordingly)

• run “bundle install” to install gems

• run “whenever –update-crontab” to set up cron jobs

• run “rake db:create db:migrate” to set up database

• reboot Raspberry Pi

Usage:

Current status from sensor should be available, check your.raspberry.IP/current and your.raspberry.IP/statuses

Sensor readings will be saved to database automatically via Crontab jobs every 3 minutes (if readings have changed). Application is started on every boot, so after setup you can leave an forget about it :)

If you are not a computer:

• visit smart-garden-client.herokuapp.com and use graphical interface, just put in sensor location.

Future plans:

• make whole app as an image to put directly on RasperryPi’s SD (zero setup)

• handle dynamic IP’s with dynamic dns service