KnockCode is an embedded system counting the number of knocks and opening the door if this number is valid according to the configuration. The datas are sent online into a google sheet document and a twitter account.
You will an arduino and the following sensors to make it work:
- LCD screen
- Ultrasonic sensor : to detect if the door is openned or not
- Vibration sensor : for the knocks
- Two LEDs : red/green