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43. Multi-Master SPI Communication

Set up an SPI communication between two Arduino UNO boards acting as masters and an SD card as a slave where 

  • Master 1 (Arduino Uno)
    • Two push buttons are connected:
    • Pressing button 1 will increment and update the counter value in the SD card.
    • Pressing button 2 will Reset count to 0 and save it on the SD card.
  • Master 2 (Arduino Uno)
    • One push button is connected and pressing it will read the counter value from the SD card.
    • And displays the counter value on the Serial Monitor.

Ensure proper SPI communication, SD card handling, button debouncing, and log all actions on the Serial Monitor.

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