def main():
mcu = Arduino()
print 'mcu.bandgap_voltage =', mcu.bandgap_voltage
print 'mcu.vcc.voltage =', mcu.vcc.voltage
print 'mcu.vcc.u_voltage =', mcu.vcc.u_voltage
print 'mcu.vcc.read_u_voltage() =', mcu.vcc.read_u_voltage()
print 'mcu.vcc.read_voltage() =', mcu.vcc.read_voltage()
print 'mcu.read_u_vcc() =', mcu.read_u_vcc()
print 'mcu.read_vcc() =', mcu.read_vcc()
