Introduction

My name is Ryosuke Kamei and I am an IT consultant based on the idea of "gentle IT"! Currently, in my work, I am doing upstream processes focusing on requirements analysis and requirements definition, but I also write programs! As part of our friendly IT activities, we will introduce "Raspberry Pi 3" (commonly known as Raspberry Pi), which has the philosophy of "providing inexpensive PCs that can be programmed for education"! This time, I will explain "Lighting the LED", which can be said to be the "Hello World" of electronic work!

1. Wiring photo

(Is the photo easier to understand than the wiring diagram?) No. 6 GND No. 16 3.3V LED配線図

2. Source led.py

The description of the program is given in the comments starting with #.

The source is uploaded to GitHub, so please use it as you like.

`Clone with git`


$ git clone https://github.com/RyosukeKamei/raspberrypi3.git

`led.py`


#Library to control GPIO
import wiringpi
#Timer library
import time

#GPIO terminal number with LED connected
led_pin = 23 #Terminal 16

#GPIO initialization
wiringpi.wiringPiSetupGpio()
#Set GPIO to output mode (1)
wiringpi.pinMode( led_pin, 1 )

#The while process seems to be in the loop range when indented.
while True:
#GPIO 3.Set to 3V and turn on the LED
	wiringpi.digitalWrite( led_pin, 1 )
	#Wait 1 second
	time.sleep(1)
	#Set GPIO to 0V and turn off the LED
	wiringpi.digitalWrite( led_pin, 0 )
	#Wait 1 second
	time.sleep(1)

3. Run led.py

`led.Run py`


$ sudo python3 led.py

When run, it glows and turns off every second!

4. Useful when programming

It doesn't matter to those who operate the Raspberry Pi directly. For those who want to operate Raspberry Pi on Mac. We write the source on Mac, save it as it is on Raspberry Pi, and execute it from Mac. (There is no display ...) For that, we use AFP. The setting method is Install Raspberry Pi 3 → Wireless LAN → Japanese input / output → Operate from Mac of "6. AFP settings" Please refer to! It's convenient because you don't have to upload files by SFTP etc.! Windows users should be able to do something similar with Samba installed!

site map

Raspberry Pi 3 setup

Install Raspberry Pi 3 → Wireless LAN → Japanese input / output → Operate from Mac

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Use python on Raspberry Pi 3 to illuminate the LED (Hello World)