You have a raspberry pi connected to all the sensors and a code running to trigger if the sensors are triggered. Each sensor and keypad would run to a different input on the pi. They should al be able to be powered with a single cell lipo. Is that what you are asking?
That is encryption. Encrypted files usually have a password assigned. In order to decrypt the file, you need to have the password.
Answer:
typing, commands, scrolling. hope this helps
Answer:
What does Bob [1] return?
What about Bob[-2]?
What about Bob[1:-1]?
How to get the length of Bob?
Explanation:
