Raspberry Pi

IoT UPJŠ

DU: shlédnou videa (alt. z jiných zdrojů) o Raspberry. https://youtu.be/fdBSbarhAUY https://youtu.be/0VwchnogzuQ Potvrďte splnění

VNC: ssh pi@192.168.1.238
ifconfig

sudo raspi.config

rasbian na PC

Python

Raspberry Pi GPIO Pinout

Raspberry Pi Python GPIO Quick start guide

install GPIO: sudo apt-get install python-rpi.gpio python3-rpi.gpio 

Install library:

sudo apt-get install python-rpi.gpio python3-rpi.gpio

Running the Script:

 sudo python blinker.py

RPi.GPIO

import RPi.GPIO as GPIO 
from time import sleep

GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD) 
GPIO.setup(18, GPIO.OUT, initial=GPIO.LOW)

while True:
   GPIO.output (18, GPIO.HIGH)
   sleep(0.2)
   GPIO.output (18, GPIO.LOW)
   sleep (0.2)

create.withcode.uk

gpiozero

Source: https://automaticaddison.com/how-to-blink-an-led-on-raspberry-pi-3-model-b/

import gpiozero  # The GPIO library for Raspberry Pi
import time  # Enables Python to manage timing
 
led = gpiozero.LED(17) # Reference GPIO17
 
while True:
  led.on() # Turn the LED on
  time.sleep(1)
  led.off() # Turn the LED off
  time.sleep(1)  # Pause for 1 second

create.withcode.uk

BOARD vs BCM

source: https://learn.sparkfun.com/tutorials/raspberry-gpio#python-rpigpio-example

import RPi.GPIO as GPIO # External module imports 
import time

# Pin Definitons:
ledPin = 23     # GPIO 23 = pin 16
butPin = 17     # GPIO 17 = pin 11

# choose BOARD or BCM  
GPIO.setmode(GPIO.BCM)               # BCM for GPIO numbering  
# GPIO.setmode(GPIO.BOARD)             # BOARD for header pin numbering  

GPIO.setwarnings(False) 

GPIO.setup(ledPin, GPIO.OUT) # LED pin set as output GPIO.setup(23, GPIO.OUT)
# GPIO.setup(butPin, GPIO.IN, pull_up_down=GPIO.PUD_UP) # Button pin set as input w/ pull-up
GPIO.setup(butPin, GPIO.IN, pull_up_down=GPIO.PUD_DOWN) # Button pin set as input w/ pull-down

# Initial state for LEDs:
GPIO.output(ledPin, GPIO.LOW) # GPIO.output(23, 0) = GPIO.output(23, False)
time.sleep(0.1)  # wait 0,1 s
GPIO.output(ledPin, GPIO.HIGH) # GPIO.output(23, 1) = GPIO.output(23, True)
time.sleep(0.1)  # wait 0,1 s


while True:
     
# print("Here we go! Press CTRL+C to exit")
# try:
#   while 1:
        if GPIO.input(butPin):      # button is released
            GPIO.output(ledPin, GPIO.LOW)

        else:                       # button is pressed:
            GPIO.output(ledPin, GPIO.HIGH)
            time.sleep(0.075)
            GPIO.output(ledPin, GPIO.LOW)
            time.sleep(0.075)

# except KeyboardInterrupt: # If CTRL+C is pressed, exit cleanly:
    GPIO.cleanup() # cleanup all GPIO

blink.py

source: /opt/nagioe/python_demo/blink.py

   import RPi.GPIO as GPIO  
   import time  

def blink(pin):       # blinking function  
    GPIO.output(pin,GPIO.HIGH)  
    time.sleep(1)  
    GPIO.output(pin,GPIO.LOW)  
    time.sleep(1)  
    return  

   GPIO.setmode(GPIO.BOARD)  # to use Raspberry Pi board pin numbers  
   GPIO.setwarnings(False)
   GPIO.setup(11, GPIO.OUT)  # set up GPIO output channel  

for i in range(0,50):  
	blink(11)

GPIO.cleanup()

push.py

source: /opt/nagioe/python_demo/push.py

   import RPi.GPIO as GPIO 
   import time  

   print GPIO.RPI_REVISION
   print GPIO.VERSION 
   GPIO.setmode(GPIO.BOARD)

pin=40

   GPIO.setup(pin, GPIO.IN)
   GPIO.setup(pin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
while (1):
  print GPIO.input(pin)
  time.sleep(0.5)
  #GPIO.output(pin, False)
GPIO.cleanup()

Control LED

import RPi.GPIO as GPIO  
import time  

def blink(pin, pin2):         # blinking function  
        GPIO.output(pin,GPIO.HIGH)  
        time.sleep(0.1)  
        GPIO.output(pin,GPIO.LOW)  
        time.sleep(0.1)  
        GPIO.output(pin2,GPIO.HIGH)  
        time.sleep(0.1)  
        GPIO.output(pin2,GPIO.LOW)  
        time.sleep(0.1)    
        return  

   GPIO.setmode(GPIO.BOARD)  # to use Raspberry Pi board pin numbers  
   GPIO.setwarnings(False)
   GPIO.setup(11, GPIO.OUT) # set up GPIO output channel  
   GPIO.setup(13, GPIO.OUT)
   GPIO.setup(40, GPIO.IN, pull_up_down=GPIO.PUD_UP)

blink(11, 13)

while (1):
	if GPIO.input(40) == 0: 		
		blink(11, 13) 
	time.sleep(0.1)
GPIO.cleanup()

Turn LED

source: http://engr.uconn.edu/~song/classes/nes/RPi.pdf

import RPi.GPIO as GPIO
import time
def main():
 GPIO.cleanup()
 GPIO.setmode(GPIO.BOARD) # to use Raspberry Pi board pin numbers
 GPIO.setup(11, GPIO.OUT) # set up GPIO output channel

 while True:
  GPIO.output(11, GPIO.LOW) # set RPi board pin 11 low. Turn off LED.
  time.sleep(1)
  GPIO.output(11, GPIO.HIGH) # set RPi board pin 11 high. Turn on LED.
  time.sleep(2)
main()

Wiring Pi

Blink

#include <wiringPi.h>
int main (void)
{
  wiringPiSetup () ;
  pinMode (0, OUTPUT) ;
  for (;;)
  {
    digitalWrite (0, HIGH) ; 
    delay (500) ;
    digitalWrite (0,  LOW) ; 
    delay (500) ;
  }
  return 0 ;
}

To compile and run:

gcc -Wall -o blink blink.c -lwiringPi
sudo ./blink

Set up the ports

How to use WiringPi2 for Python on the Raspberry Pi in Raspbian part 1

# GPIO port numbers  
import wiringpi2 as wiringpi  
wiringpi.wiringPiSetupGpio()  
wiringpi.pinMode(25, 0) # sets GPIO 25 to input  
wiringpi.pinMode(24, 1) # sets GPIO 24 to output  
wiringpi.pinMode(18, 2) # sets GPIO 18 to PWM mode  
  
# wiringpi numbers  
import wiringpi2 as wiringpi  
wiringpi.wiringPiSetup()  
wiringpi.pinMode(6, 0) # sets WP pin 6 to input  
wiringpi.pinMode(5, 1) # sets WP pin 5 to output  
wiringpi.pinMode(1, 2) # sets WP pin 1 to PWM mode  
  
# Physical P1 header pin numbers  
import wiringpi2 as wiringpi  
wiringPiSetupPhys()  
wiringpi.pinMode(22, 0) # sets P1 pin 22 to input  
wiringpi.pinMode(18, 1) # sets P1 pin 18 to output  
wiringpi.pinMode(12, 2) # sets P1 pin 12 to PWM mode

RaspBian

Username: pi, password: NAGIoE2015

Re-mapping Keyboard: XKBLAYOUT=”gb” Change “gb” to “us”

sudo vi /etc/default/keyboard   

Start the desktop by typing: (http://engr.uconn.edu/~song/classes/nes/RPi.pdf)

startx  

Booting your Raspberry Pi for the first time

sudo raspi-config

Update apt-get package index files:

sudo apt-get update

Install SSH:

sudo apt-get install ssh

Start SSH server:

sudo /etc/init.d/ssh start

To start the SSH server every time the Pi boots up:

sudo update-rc.d ssh defaults

How To Autostart Apps In Rasbian LXDE Desktop

sudo nano /etc/xdg/lxsession/LXDE-pi/autostart

Auto-run Python Scripts

@/usr/bin/python /home/pi/example.py