Arduino-based automatic backflushing program on Elektra espresso machine

I implemented automatic backflushing using a simple loop and digitalWrite on the Arduino. The two solid state relays are connected directly between Arduino digital pins and ground. All of the code is in the init() section of the program, so it is only executed once when the Arduino is turned on. In this video, the Arduino is configured to enabled the group (turn on both SSRs) for 3.5 seconds, disable the group (turn off both SSRs) for 1.5 seconds, and repeat 7 times.

Though this is simple code (heavily based on the LED blink example), it is very convenient for an espresso machine application.

Category:

Entertainment

Tags:

• arduino
• elektra
• espresso
• backflush