# file: raspi_skimscan.py

# auth: Tyler Winegarner (twinegarner@gmail.com)

# desc: scans for local bluetooth devices with names matching the description of those

# used in cas pump credit card skimmers. This software is directly derived from

# the research done by Nathan Seidle as documented in this article:

# https://learn.sparkfun.com/tutorials/gas-pump-skimmers

#

import time

import bluetooth

import sys

import Adafruit_GPIO.SPI as SPI

import Adafruit_SSD1306

import RPi.GPIO as GPIO

from PIL import Image

from PIL import ImageDraw

from PIL import ImageFont

# Raspberry Pi pin configuration:

RST = 24 # on the PiOLED this pin isnt used

# Note the following are only used with SPI:

DC = 23

SPI_PORT = 0

SPI_DEVICE = 0

# setup the button

button = 18 #Set this pin you are using

GPIO.setmode(GPIO.BMC)

GPIO.setup(button,GPIO.IN, pull_up_down=GPIO.PUD_UP)

disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST, dc=DC, spi=SPI.SpiDev(SPI_PORT, SPI_DEVICE, max_speed_hz=8000000))

disp.begin()

time.sleep(3)

disp.clear()

disp.display()

width = disp.width

height = disp.height

image = Image.new('1', (width, height))

draw = ImageDraw.Draw(image)

font = ImageFont.load_default()

ellipsis = ". "

phase = 0

def push_request():

nearby_devices = bluetooth.discover_devices(duration=10, lookup_names=True)

return nearby_devices

while True:

input_state = GPIO.input(button)

draw.rectangle((0, 0, width, height), outline=0, fill=0)

draw.text((0, 24), "scanning" + ellipsis, font=font, fill=255)

disp.image(image)

disp.display()

if(input_state == False):

nearby_devices = push_request()

print("found %d devices" % len(nearby_devices))

for addr, name in nearby_devices:

if (name == "HC-05") or (name == "HC-03") or (name == "HC-06"):

draw.rectangle((0, 0, width, height), outline=0, fill=0)

draw.text((0, 12), "Potential skimmer", font=font, fill=255)

draw.text((0, 24), name + " found.", font=font, fill=255)

draw.text((0, 36), "Skip this pump.", font=font, fill=255)

disp.image(image)

disp.display()

time.sleep(5)

phase += 1

if phase == 1:

ellipsis = ".. "

elif phase == 2:

ellipsis = "... "

elif phase == 3:

ellipsis = "...."

else:

ellipsis = ". "

phase = 0