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Semper 5

@cyperghost it's 0 on both being pressed and released

cyperghost

@semper-5 That's the error here ... but tell me why? That's not possible! The python scripts are working?

Maybe @Yahmez knows the answer?
If we watch for input of GPIO24 (=power button), why there is no change in input value?

Semper 5

@cyperghost I know! Our frustration is real. I mean it works as it should with Yahmez's script. And just to be sure I am following your instructions immaculately, yours is the ONLY script I'm running on this fresh image.

Geez it was embarrassing you guys telling me to use Notepad++ and how to invoke the script LOL. but I do appreciate all your efforts to walk me through it. I'm just thinking you guys must be getting as frustrated with me as I'm getting frustrated with this not working - I'm yelling at this damn box like "you're making an idiot out of me in front of the community, damn you!" haha

Yahmez

@cyperghost
I am late to the game here but if my script works as intended (minus saving metadata which was never implemented) and cypherghost's script is not seeing the button presses then the logical thing would be to compare the two scripts and see how they are being handled differently.

cyperghost

@yahmez ;)
Thank you for stepping in my friend.
So let's compare ;)

#!/usr/bin/python
 
import RPi.GPIO as GPIO
import os, time
 
GPIO.setmode(GPIO.BCM)
GPIO.setup(23, GPIO.IN, pull_up_down=GPIO.PUD_UP)   #Reset switch
GPIO.setup(24, GPIO.IN, pull_up_down=GPIO.PUD_UP)   #Power switch
GPIO.setup(25, GPIO.OUT)                            #ON control
GPIO.output(25, GPIO.HIGH)
 
while True:
  if (GPIO.input(24)):
    time.sleep(0.25)
  else:
    print ("Shutting down...")
    os.system("sudo shutdown -h now")
    break
  if (GPIO.input(23)):
    time.sleep(0.25)
  else:
    print ("Resetting...")
    os.system("sudo reboot now")
    break

and

script version from here
I did not implent reset handling here ;)

mitu

@cyperghost Maybe the wires are connected to other pins ?

cyperghost

@mitu This can only be answered by @Semper-5 but I assume not!
As I remeber he told me, that the python scripts are working ;)

Yahmez

If it just cuts power upon turning off the power switch it means that the on control pin is not going high on boot.

mitu

@cyperghost Python is a sneaky snake...

cyperghost

@yahmez Can you test the script on your build, too?
@mitu Python is very cool - indeed. But I also checked the way GPIOs are called. It's BCM mode. So Python GPIO = Bash GPIO

Yahmez

@cyperghost I will give it a try this weekend if I can but I have relatives coming to stay so I'm not 100% sure I'll be able to till next week.

Yahmez

@Semper-5
Can you try gpio readall to verify that the on control pin is high?

cyperghost

@yahmez No problem... I would be glad to hear your outfindings but take your time.

Yahmez

@cyperghost I am no coding guy. Does your BASH script enable the internal pullup on 25?

cyperghost

@yahmez No! I don't use wiringpi.... or raspi-gpio.

But would be possible with bash, too

raspi-gpio set $trigger_pin ip pu
echo "monitoring BCM $trigger_pin"

pin_state() {
    raspi-gpio get $trigger_pin | grep -c "level=0 fsel=0 func=INPUT"
}

shutdown_trigger() {
    if [ `pin_state` = 1 ]; then
        echo "BCM $trigger_pin asserted low"
....

Yahmez

@cyperghost That is the problem then, at least part of it.

cyperghost

@yahmez afaik this should work without the pullup. As I said, I sadly have no POLOLU switch available. Is there no connection to ground from the POLOLU to the GPIO?

Semper 5

sorry for the late reply. I'm trying to get out of work.
my GPIO config is exactly as configured in Yahmez's tutorial.
23 reset
24 power
25 power (ON)

my GPIO readall with cyperghost's script
but as we see here, its not looking very live.

just as a reminder, I can get Yahmez's to fire up with no problem - just to rule out the possibility of bad wiring and I did confirm that my wiring looked good to a few other people who are VERY familiar with this mod.

EDIT: SORRY I didn't run the gpio readall with the script running. GPIO 25 has a difference now

Yahmez

@cyperghost No. It will absolutely not work without the pullup. There is a reason I put it in my script :p

cyperghost

@semper-5 ~~Why is GPIO25 set low?~~ Okay corrected now.
@Yahmez Okay, that's interesting.... but I think it's no problem to integrate the script into yours. So I would suggest to remove the GPIO init and just make a call to to PID detection/removal routine.