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  • Otte, Dr. Peter-Bernd @pbotte ·

    cable assignment:

    • red = +5V
    • black = GND
    • green = TX, 3.3V TTL level (connect to RX on MCU side)
    • blue = RX, 3.3V TTL level (connect to TX on MCU side)
  • Otte, Dr. Peter-Bernd @pbotte ·

    cable assignment for MH-Z16:

    • black = GND
    • red = +5V
    • white = RX, 3.3V TTL level (connect to TX on MCU side)
    • yellow = TX, 3.3V TTL level (connect to RX on MCU side)
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