├── README.md
└── main.py


/README.md:
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 1 | # PiDisplaySleep
 2 | 
 3 | A powersaver code written in python3 to put your Pi's display to sleep when you are not near it (checks if your phone is connected to the wifi !). This code is mainly aimed to run on smart mirrors(I use MagicMirror). If you live in a dorm room like me and dont want your mirror up all day long when you are away: this does the purpose !
 4 | 
 5 | Set up :
 6 |   Enter your phone's or whatever devices' IP address in the script.
 7 |   Run the script at boot OR just run the main.py as : " python main.py & " through ssh and exit ssh with Ctrl + D. This will     run the script in background until the next power down.
 8 | 
 9 | Note: this project uses the nmap package to do network scans; make sure you install it on your device using 
10 | $ sudo apt-get install nmap
11 | 


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/main.py:
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 1 | from os import popen,system
 2 | from time import sleep
 3 | state=1 #State of the display 1 On 0 Off
 4 | ip="192.168.1.3" #Enter the IP address of the device that should keep the display awake
 5 | 
 6 | while True:
 7 |     nmap_out=str(popen('nmap -sP '+ip).read()) #nmap command to scan on the given IP address
 8 |     sleep(2)
 9 |     
10 |     if nmap_out.find('latency') == -1:  #looks for the word "latency" in the output
11 |         if state==0 :                   #this nested if makes sure that commands are not repeated
12 |             pass
13 |         else :
14 |             system('vcgencmd display_power 0')  #Bash command that turns off the display
15 |             state=0                             #Updating the display state variable
16 | 
17 |     elif nmap_out.find('latency') > 1:
18 |         if state==1:
19 |             pass
20 |         else :
21 |             system('vcgencmd display_power 1') #Bash command to turn on the display
22 |             state=1
23 | 
24 |     sleep(5) #Scan rate in seconds
25 | 


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