serial-bruteforce.py

import serial
import RPi.GPIO as GPIO
import time
import pygame
import pygame.camera

pygame.camera.init()
camera =  pygame.camera.Camera("/dev/video0", (1024,768))
camera.start()

surf = camera.get_image()
GPIO.setmode(GPIO.BCM)
for bslabel, bs in {"EIGHTBITS": serial.EIGHTBITS, "SEVENBITS": serial.SEVENBITS }.items():
    # , "SIXBITS": serial.SIXBITS, "FIVEBITS": serial.FIVEBITS  
    for parlabel, par in {"NONE": serial.PARITY_NONE, "ODD": serial.PARITY_ODD, "EVEN": serial.PARITY_EVEN, 
                          "MARK": serial.PARITY_MARK, "SPACE": serial.PARITY_SPACE}.items():
        for stlabel, stop in {"ONE": serial.STOPBITS_ONE, "1.5": serial.STOPBITS_ONE_POINT_FIVE, 
                              "TWO": serial.STOPBITS_TWO}.items():
            for bps in [8000, 8400, 8600, 8800, 9000, 9200, 9300, 9400, 9450, 9500, 9550, 9600, 9650, 9700, 9800, 10000]:
              # sub your own BPS values here. I was wondering about an aging crystal, hence strange values
                for xonxoff in (True, False):
                    
                    # I have attached GPIO 7 to a transistor controlling the device's power
                    # it is powered by a boost converter w/ big caps, which takes a while to drain
                    # you could shorten these delays w/o that.
                    GPIO.setup(7, GPIO.OUT)
                    GPIO.output(7, 0)
                    time.sleep(.5)
                    GPIO.output(7, 1)
                    time.sleep(2.5)
                    
                    fn = str(bps) + bslabel + parlabel + stlabel + str(xonxoff) + ".jpg"
                    
                    print(str(bps),bslabel, parlabel, stlabel, str(xonxoff))
                    
                    with serial.Serial("/dev/ttyAMA0", bps, bytesize=bs, parity=par, inter_byte_timeout=0.1, 
                    stopbits=stop, xonxoff=xonxoff, timeout=1) as sph:
                        sph.write(("\n\rhello there\n\rok how's it going\n" + str(bps) + 
                                   bslabel + parlabel + stlabel + str(xonxoff)).encode('utf-8'))
                        time.sleep(2)
                        surf = camera.get_image()
                        pygame.image.save(surf, fn)