Arduino or AVR as ADC, polled through SPI or I2C

Turn your Arduino/AVR into an Analog to Digital Converter (ADC) that you can poll via SPI or I2C in slave mode.

1

Step 1

Download the files for SPI or i2c.
2

Step 2

Flash the *.ino file onto the Arduino or other ATMEGA328.
3

Step 3

Compile the *.cpp file on the Arduino. I use Geany but the command line instructions listed in the files will also work.
4

Step 4

Connect the Arduino, level shifter and Raspi as shown in the diagram.

Discussions