new_contents: #!/usr/bin/env python3
  import gpio
  import rospy
  import time
  from std_msgs.msg import Bool
  
  CHANNEL = 395
  gpio.setup(CHANNEL, gpio.IN)
  
  if __name__ == '__main__':
      rospy.init_node("StartButton")
      start_pub = rospy.Publisher("/start", Bool, queue_size=10)
      r = rospy.Rate(4)
      while not rospy.is_shutdown():
          if not gpio.input(CHANNEL):
              start_pub.publish(Bool(True))
          r.sleep()
  
subject: Create simple node to check start button state