# Temperature Logger

This is a little program I wrote to talk to an Arduino over USB serial to read
temperature and relative humidity values using a DHT11 sensor, and put then in a SQLite database. 

![arduino and screen listing temperature and humidity readings](image.jpg)

`main.c` is the PC program that does the logging (printing to stdout). 

It just reads printed messages from the serial port `USB0`, and writes them back 
into a SQLite3 database. It automatically creates the database and tables
if they don't exist (making it do that was 90% of the work).

`arduino.ino` is the Arduino IDE project that reads from the hardware using the 
Adafruit sensors library. 

The arduino code is very arduino which isn't too nice since sine its such a tiny 
project pulling a lot of dependencies but I guess that's fine. Re-writing the 
DHT11 library would probably be interesting to do.

### Compiling

For `main.c` run `make`

For the `arduino.ino` track down the Adafruit DHT11/DHT22 library, import it and build the project in the Arduino IDE.