Yesterday I discovered a service port on my Bosch Espresso machine. I was wondering how I can use that port and maybe use an arduino (+ twitter) to make a cup of coffee for me!
So I started by investigating the wires, there are 4 wires. The connector is the same as a floppy drive power connector from the days. I started measuring the voltage between the wires, there is one ground, and between the ground and the other 3 wires there is an voltage difference of 5 volts.
How can I figure out the type of connection? JTAG usually works at 3.3 volts right? Can it be some kind of serial? How do I find the right baud rate?
PS: It's a Bosch benvenuto B30