Can you create a macro

[M4TTHI]

Hello guys,
I've made a program that collects data from differents sensors and saves it on a USB stick.
The only way the program can be closed/stopped is by a keyboardInterrupt.

Now to my question:
Is there a way to create a macro that if you press a button (that is connected thorugh the GPIO's or if it's simplier connected with USB) a keyboardInterrupt occurs and the program stop?

Thanks in advance

Kind regards
Matthias

[deepo]

You could use the kill command to send the keyboard interrupt.

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kill -SIGINT PID

where PID is the process ID of your script, use ps -ef or ps -aux to find the PID.

/Mogens

[pcmanbob]

You have not said which programming language you are using , but you should be able to add the switch ( button ) to the gpio and read its state as part of you existing program,

when the program sees the state change its a simple matter of running the same commands to stop your program running as you would if you did Ctrl ,C.

[M4TTHI]

Oh sry im running the programm in the python language.

So that means instead of
try:
...
except KeyboardInterrupt:
...

I could simplay use this to stop the programm:

try:
...
except GPIO == True:
...

Or did i just missunderstand what you said?

[pcmanbob]

So I would do it like this, add a gpio event detect and then when it detects a button press it runs the call back, in the call back you can put what ever commands you want , for example gpio.cleanup() then the last line in the callback is sys.exit() which exits python / your program.

so code might look some thins like this

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def program_exit(channel):
    print("program exit called")
    # add any other commands you might want like gpio.cleanup()
    sys.exit()

GPIO.add_event_detect(21, GPIO.RISING, callback=program_exit)  # add rising edge detection on a channel
...the rest of your program...

put the function and the gpio line neat the sart of your program after setting up any gpio.

this give more detail about using event detect and call backs
https://sourceforge.net/p/raspberry-gpi ... ki/Inputs/

[M4TTHI]

Ok thank you for your help.
I will try to do it like u showed me.

Have a nice day