Raspberry Pi Gpio Input output-control LED

　　

The GPIO pin has two modes board and BCM.

1.GPIO output Control LED

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Code:

　　　　

(1) Using board mode, GPIO.setmode(GPIO.BOARD) . Pin 35th is GPIO19 under BCM.

(2) Set pin 35 to output mode,GPIO.setup(35,GPIO.OUT)

(3) on the GPIO35 pin output high level, can also be Gpio.high

2.GPIO interface for input signal

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Circuit diagram

　　

When the switch is off, the GPIO23 is the high point level to obtain the input signal is ture. When the switch is pressed, the GPIO23 is grounded, and the obtained signal is false.

Code:

　　

(1) for the use of 35 as the output pin, 36 as the input pin.

(2)"Gpio.setup (Channel,gpio. In,pull_up_down=gpio. PUD_UP) "Set the input port to pull-up mode to

Raspberry Pi Gpio Input output-control LED