"""
  author  Benoit Dubois
  copyright FEMTO Engineering, 2021
  licence GPL v3+
  brief   Collector for aggregating pins used as switches in  PID servo app.
  """
  
  class Switches(object):
      """Collector for aggregating pins used as switches in PID servo app.
      """
  
      def __init__(self, p1, i1, p2, i2):
          """Parameters are pin identifiers allowable by pyb.Pin class (e.g. pin
          object, CPU pin, string matching board pin...).
          """
          self.p1 = pyb.Pin(p1)
          self.i1 = pyb.Pin(i1)
          self.p2 = pyb.Pin(p2)
          self.i2 = pyb.Pin(i2)