Make your work private by building a system using arduino which instantly kills a program when someone enters your room/cabin
FOR LINUX USERS: INSTEAD OF PYTHON, NOW YOU CAN USE .SH BASH FILE I PROVIDED. chmod +x the file first and then run it . No need to run the python one.
STEPS:
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Upload "killbill/killbill.ino" to arduino board
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Install pyserial, os, signal library in python using: "pip install pyserial" etc..
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run start.py using "python3 start.py" or "python start.py"
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type in PID of the process to be killed, PID can be looked up by task manager or just search the net how to find PID of a process
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Type full name of port, ex - "COM5" or "/dev/ttyACM0" etc.
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"Running..." means program is running now. Don't touch the command prompt and DO WHATEVER YOU WANT NOW
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Now any signal to PIN A0 on arduino which is greater than 750 (analogRead) will kill the process.
NOTE: COnfigure your sensors or edit the arduino code, Remember that you need to send a "killbill" to serial from arduino i.e. Serial.println("killbill"); to kill the process. SO, configure accordingly. Use motion sensor or build a sensor using copuple of LDR, IR detectors and a light source or UV distance finder. Put sensors on door step
NOTE2: Linux users may need to "sudo chmod a+rw /dev/ttyACM0" in case of permission denied error