def ping(self):
"""
Returns True if OPSOROHAT rev3 is connected.
:return: True if shield is connected
:rtype: bool
"""
return SPI.command(CMD_PING, returned=1)[0] == 0xAA
def led_off(self):
"""Turns status LED off."""
SPI.command(CMD_LEDOFF)
def led_on(self):
"""Turns status LED on."""
SPI.command(CMD_LEDON)
def reset(self):
"""Resets the ATmega328, MPR121 and PCA9685."""
SPI.command(CMD_RESET, delay=2)