new_contents: from machine import Signal
  
  # 96Boards Carbon board
  # USR1 - User controlled led, connected to PD2
  # USR2 - User controlled led, connected to PA15
  # BT - Bluetooth indicator, connected to PB5.
  # Note - 96b_carbon uses (at the time of writing) non-standard
  # for Zephyr port device naming convention.
  LED = Signal(("GPIOA", 15), Pin.OUT)
  
subject: Add config for Zephyr port of 96Boards Carbon.