RFID-enabled Coffeemaker Juraduino Jura Impressa S95 and Arduino

Final project video about my RFID-enabled coffeemaker with timestamp logging and bluetooth data export functionality. This is NOT a tutorial! What I did: I connected a SD card module (V1.2 Elecfreaks), a real-time clock module (DS1370RTC) and a bluetooth module (HC-05) to an Arduino (Duemilanove in my case, but an Uno would do it as well). To trigger the coffeemaker, I soldered wires to the buttons (backside of logic print of the coffeemaker) and simulate a button press via an optocoupler (4N 35) and a pre