Embedded System

http://www.tik.ee.ethz.ch/education/lectures/ES/

Arduino

Raspberry 

http://www.raspberrypi.org/learning/temperature-log/worksheet.md

http://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/

http://www.linuxloop.com/2009/09/28/remotely-accessing-your-linux-computer-part-1/

http://elinux.org/RPi_Tutorials

http://pi.gadgetoid.com/pinout/spi

https://docs.python.org/2.7/

http://raspberrywebserver.com/cgiscripting/rpi-temperature-logger/

Agricultural Activities

http://www.vision-systems.com/articles/2014/02/report-agricultural-robot-market-expected-to-hit-16-3-billion-by-2020.html

http://www.agriculturenewsnetwork.com/2014/04/08/agriculture-robot-by-shigeki-toyama/