Gaggia Classic Pro Elegant Hack Stage 1 - OLED (DONE!)

Arduino OLED Connection

The OLED 1.5 inch display is a great gorgeous large display that can convey a lot of information.     Please see diagram below on how to wire to the Arduino.  There is no connection directly from the OLED to Gaggia Classic Pro.  We are using the Arduino's SPI interface lines to the OLED.



Notes
  • I am using the build-in Arduino SPI hardware lines.  This is more efficient anytime you can let the hardware to do the communication.
  • Arduino's SPI MISO line (pin 12) is not connected here since the OLED display do not need to send info to the Arduino.   We will be using this pin in future upgrades to connect to the high precision temperature SPI sensor.  
  • I used the OLED build-in connector cable to directly plug into the Arduino's pin out connectors. (No soldering here). 
  • I did solder the +5V onto the same line power supply's +5V to attempt to save a pin for future expansion.  (infusion control pump and relay to controller the boiler).  You can certainly use one of the digital output pin as ground by setting to LOW if you want to minimize soldering and do not plan to move to stage II.  Just remember you have to add the pin modes in the source code in the setup section. 
  • You see the right side of the OLED has soldering pads for the SPI connector port.   We will be using these pads to simplify the wiring when we connect high precision temperature SPI sensor.  

This concludes the Stage 1 hack/modifications.   Hope you are enjoying the build process.   Stage II is well on its way.  Please stay tuned for future documentation.

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