A project to build a small system logging various parameters while you sleep!

This is a project within the scope of the course "Embedded Linux" at the Univerity of Applied Science Augsburg.

Currently it's planned to log the following values:

• room temperature
• humidity of the room
• noise level
• air quality
• light level

Hardware:

• Beaglebone Black
• AM2302 temperature and humidity sensor
• MQ2 Gas sensor
• some cheap microphone bought on Amazon (has this string on it: CZN-15E)
• GL5528 light sensitive resistor

Software:

• Currently working with the Debian image provided by beaglebone.org (I uninstalled X though)
• gcc & gdb
• clang-format
• cppcheck, valgrind, flawfinder
• sqlite3
• lighttpd
• some code written by Tony DiCola for Adafruit (https://github.com/adafruit/Adafruit_Python_DHT) to read the AM2302

The idea:

Log all these parameters constantly (depending on the sensor) writing the averages to the sqlite3 database every 10 or so seconds. Supply a web interface to view charts of the gathered data, see trends or spikes (like a loud noise, a flash of light, etc.). This will help understand problems with the sleeping environment and help optimize it.

Progress/Milestones:

X = done, F = relatively tested - kind of stable code, B = testing/debugging, -> = wip, - = todo, + = optional/possible feature

• X aquire hardware
• X connect hardware to BBB
• X get adc working
• X read from AM2302
• X database design
• F interface for the database
• F reading & buffering data from the sensors
• F "scheduler" and threads
• F module to analyze the data
• F main function
• -> create style for the website
• • web interface
• -> lots of testing & debugging
• • alarm module
• • display
• • wifi module
• • case