Raspberry Pi PWM Control Brushless motor

The following accessories are used:
Raspberry Pi 3 * *
Brushless ESC 30A *
Brushless Motor A2212 1400kv *
7.4V Power Supply * *
5V Power Supply * *
Connecting Wire several

The simple connection diagram is as follows:

Code:

Import Rpi.gpio as Gpio
import time, sys

#我用的第12个引脚
pin = 

Gpio.setmode (gpio). BOARD)
Gpio.setup (PIN, Gpio. Out)

#频率设置为400Hz
p = gpio. PWM (PIN, max)

p.start (0)

#占空比从10开始, gradually added to the
DC = Ten for
i in range (+):
    dc + = 2
    print ' DC: ' , DC
    p.changedutycycle (DC)
    Time.sleep (0.3);

P.stop ()
gpio.cleanup ()