flask를 이용한 led 3개 on/off

github에서 code 다운로드

https://github.com/bsy3764/raspberry/tree/master/3_led%20test

bsy3764/raspberry

 

라즈베리파이 GPIO 확인하기

$ gpio readall
 +-----+-----+---------+------+---+---Pi 4B--+---+------+---------+-----+-----+
 | BCM | wPi |   Name  | Mode | V | Physical | V | Mode | Name    | wPi | BCM |
 +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
 |     |     |    3.3v |      |   |  1 || 2  |   |      | 5v      |     |     |
 |   2 |   8 |   SDA.1 |   IN | 1 |  3 || 4  |   |      | 5v      |     |     |
 |   3 |   9 |   SCL.1 |   IN | 1 |  5 || 6  |   |      | 0v      |     |     |
 |   4 |   7 | GPIO. 7 |   IN | 1 |  7 || 8  | 1 | IN   | TxD     | 15  | 14  |
 |     |     |      0v |      |   |  9 || 10 | 1 | IN   | RxD     | 16  | 15  |
 |  17 |   0 | GPIO. 0 |   IN | 0 | 11 || 12 | 0 | IN   | GPIO. 1 | 1   | 18  |
 |  27 |   2 | GPIO. 2 |   IN | 0 | 13 || 14 |   |      | 0v      |     |     |
 |  22 |   3 | GPIO. 3 |   IN | 0 | 15 || 16 | 0 | IN   | GPIO. 4 | 4   | 23  |
 |     |     |    3.3v |      |   | 17 || 18 | 0 | IN   | GPIO. 5 | 5   | 24  |
 |  10 |  12 |    MOSI |   IN | 0 | 19 || 20 |   |      | 0v      |     |     |
 |   9 |  13 |    MISO |   IN | 0 | 21 || 22 | 0 | IN   | GPIO. 6 | 6   | 25  |
 |  11 |  14 |    SCLK |   IN | 0 | 23 || 24 | 1 | IN   | CE0     | 10  | 8   |
 |     |     |      0v |      |   | 25 || 26 | 1 | IN   | CE1     | 11  | 7   |
 |   0 |  30 |   SDA.0 |   IN | 1 | 27 || 28 | 1 | IN   | SCL.0   | 31  | 1   |
 |   5 |  21 | GPIO.21 |   IN | 1 | 29 || 30 |   |      | 0v      |     |     |
 |   6 |  22 | GPIO.22 |   IN | 1 | 31 || 32 | 0 | IN   | GPIO.26 | 26  | 12  |
 |  13 |  23 | GPIO.23 |   IN | 0 | 33 || 34 |   |      | 0v      |     |     |
 |  19 |  24 | GPIO.24 |   IN | 0 | 35 || 36 | 0 | IN   | GPIO.27 | 27  | 16  |
 |  26 |  25 | GPIO.25 |   IN | 0 | 37 || 38 | 0 | IN   | GPIO.28 | 28  | 20  |
 |     |     |      0v |      |   | 39 || 40 | 0 | IN   | GPIO.29 | 29  | 21  |
 +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
 | BCM | wPi |   Name  | Mode | V | Physical | V | Mode | Name    | wPi | BCM |
 +-----+-----+---------+------+---+---Pi 4B--+---+------+---------+-----+-----+

• app.py의 코드에서 7, 8번의 pin number는 BCM

 

IP 주소 확인 및 실행

• app.py 파일이 있는 곳에서 실행

$ cd test
$ python3 app.py 
/home/pi/Flask/lib/python3.7/site-packages/gpiozero/devices.py:279: PinFactoryFallback: Falling back from rpigpio: No module named 'RPi'
  'Falling back from %s: %s' % (name, str(e))))
/home/pi/Flask/lib/python3.7/site-packages/gpiozero/devices.py:279: PinFactoryFallback: Falling back from rpio: No module named 'RPIO'
  'Falling back from %s: %s' % (name, str(e))))
/home/pi/Flask/lib/python3.7/site-packages/gpiozero/devices.py:279: PinFactoryFallback: Falling back from pigpio: No module named 'pigpio'
  'Falling back from %s: %s' % (name, str(e))))
 * Serving Flask app "app" (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: on
 * Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)	# <--- 해당 주소로 접속
 * Restarting with stat
/home/pi/Flask/lib/python3.7/site-packages/gpiozero/devices.py:279: PinFactoryFallback: Falling back from rpigpio: No module named 'RPi'
  'Falling back from %s: %s' % (name, str(e))))
/home/pi/Flask/lib/python3.7/site-packages/gpiozero/devices.py:279: PinFactoryFallback: Falling back from rpio: No module named 'RPIO'
  'Falling back from %s: %s' % (name, str(e))))
/home/pi/Flask/lib/python3.7/site-packages/gpiozero/devices.py:279: PinFactoryFallback: Falling back from pigpio: No module named 'pigpio'
  'Falling back from %s: %s' % (name, str(e))))
 * Debugger is active!
 * Debugger PIN: 193-236-952

 

라즈베리파이 연결1

라즈베리파이 연결2

 

라즈베리파이 연결3

 

 

실행한 사이트

• 0.0.0.0:5000/색깔/숫자 형태로 주소 입력
  • ex) 0.0.0.0:5000/red/1    빨간 led on
  • ex) 0.0.0.0:5000/yellow/1    노란 led on
  • ex) 0.0.0.0:5000/all/0    모든 led off

0.0.0.0:5000/red, yellow/1 실행 결과