pil example scan4pi (snippet)

Python pil example 'scan4pi'

Functions in program:

• def get_all_pi(epd):
• def display_running(epd):
• def main():

Modules used in program:

• import os
• import sys
• import smbus
• import socket
• import sys
• import nmap

python scan4pi

Python pil example: scan4pi

#! /usr/bin/python
# Python3 code to print(IP addresses and host name of local network)
# to e-ink screen

import nmap
import sys
import socket
from gpiozero import RGBLED, Button
import smbus
import sys
import os
from PIL import Image
from PIL import ImageOps
from PIL import ImageDraw
from PIL import ImageFont
from EPD import EPD
from pexpect import pxssh
#import font1

button1 = Button(16)
button2 = Button(19)
button3 = Button(20)
button4 = Button(26)


def main():
        epd = EPD()
        try:
                while True:
                        if button2.is_pressed:
                                display_running(epd)
                                get_all_pi(epd)
        except KeyboardInterrupt:
                print(("Exiting Appliance"))


# Code to show that a new speed test is running.
def display_running(epd):
    w = epd.width
    h = epd.height
    # initially set all white background
    image = Image.new('1', epd.size, WHITE)

    # prepare for drawing
    draw = ImageDraw.Draw(image)
    draw.rectangle((1, 1, w - 1, h - 1), fill=WHITE, outline=BLACK)
    draw.rectangle((2, 2, w - 2, h - 2), fill=WHITE, outline=BLACK)
    # text
    draw.text((10,35), "Looking for Raspberry Pi's", fill=BLACK, font=text_font2)
    draw.text((10,65), 'Please Wait.......', fill=BLACK, font=text_font2)
    # display image on the panel
    epd.display(image)
    epd.update()


def get_all_pi(epd):
        w = epd.width
        h = epd.height
        title="Found Pi's"
        r = 25
        # prepare for drawing
        image = Image.new('1', epd.size, WHITE)
        draw = ImageDraw.Draw(image)
        draw.rectangle((1, 1, w - 1, h - 1), fill=WHITE, outline=BLACK)
        draw.rectangle((2, 2, w - 2, h - 2), fill=WHITE, outline=BLACK)
        # text
        draw.text((5,5), title, fill=BLACK, font=text_font2)
        nm = nmap.PortScanner()

        nm.scan('192.168.0.0/24', arguments='-sP', sudo=True)
        for h in nm.all_hosts():
                if 'mac' in nm[h]['addresses']:
                        for x in nm[h]['vendor'].keys():
                                if x.startswith('B8:27:EB'):
                                        string = 'IP: ' + (nm[h]['addresses']['ipv4'])
                                        ipadd = (nm[h]['addresses']['ipv4'])
                                        draw.text((5,r), string, fill=BLACK, font=text_font1)
                                        try:
                                                s = pxssh.pxssh(options={"StrictHostKeyChecking": "no","UserKnownHostsFile": "/dev/null"})
                                                s.login(ipadd, 'pi','raspberry')
                                                s.logout()
                                                draw.text((125,r), 'Login Successfull', fill=BLACK, font=text_font1)
                                        except pxssh.ExceptionPxssh as e:
                                                draw.text((125,r), 'Login Failed', fill=BLACK, font=text_font1)
                                        r+=15

        epd.display(image)
        epd.update()


if __name__ == "__main__":
        epd = EPD()
        WHITE = 1
        BLACK = 0
        w = epd.width
        h = epd.height
        possible_fonts = [
        '/usr/share/fonts/truetype/freefont/FreeMonoBold.ttf',            # R.Pi
        '/usr/share/fonts/truetype/ttf-dejavu/DejaVuSansMono-Bold.ttf',   # R.Pi
        '/usr/share/fonts/truetype/freefont/FreeMono.ttf',                # R.Pi
        ]
        FONT_FILE = ''

        for f in possible_fonts:
                if os.path.exists(f):
                        FONT_FILE = f
                break
        if '' == FONT_FILE:
                raise 'no font file found'

        TEXT_FONT_SIZE1 = 11
        TEXT_FONT_SIZE2 = 15
        text_font1 = ImageFont.truetype(FONT_FILE, TEXT_FONT_SIZE1)
        text_font2 = ImageFont.truetype(FONT_FILE, TEXT_FONT_SIZE2)
        main()                  

Python links

• Learn Python: https://pythonbasics.org/
• Python Tutorial: https://pythonprogramminglanguage.com