HeadTouch
This is a ROS message definition.
Source
# A message for Nao's tactile interface (toucht buttons on the head)
uint8 button # which of the three segments is touched
uint8 state # pressed or released, see below
uint8 BUTTON_FRONT=1
uint8 BUTTON_MIDDLE=2
uint8 BUTTON_REAR=3
uint8 STATE_RELEASED=0
uint8 STATE_PRESSED=1