Multi Switch Shutdown Script!

mrfalk

Cool I was messing around with it yesterday but dident get it to work I’ll try again today after work.
And it’s not a car I’m using it’s a trigger signal from my projector that is normally used to tell screen go down when projector is on and hop when you turn the projector off.
But I guess it works the same.
And yes relay circuit is ether close or open depending in if the projector is on or off so same principle i guess

One question do I only install script and tell which button to use or do I need to mess with python commands?

cyperghost

@mrfalk

One question do I only install script and tell which button to use or do I need to mess with python commands?

You download the script with wget command or insert the code with nano and make the script executable (chmod +x). By default GPIO3 (=Pin5) is used because this pin is the only one to wake the Raspberry from deep sleep. The shutdown function is independent from GPIOs but as I said only GPIO3 offers full shutdown/repower ability.
The just type ./multi_switch.sh --generic and follow intructions. It's very likely you need to install raspi-gpio with sudo apt install raspi-gpio before but the script will tell you.

Yes please report your progress. But why you want to use a relais? Opto-isolators are much cheaper and easier to use.
Wiki Opto Isolator
https://en.wikipedia.org/wiki/Opto-isolator

mrfalk

couse im a newbie at the electronic/rasberry/ stuff but learning and relay was only thing i could think of and that i had laying around =)

when i do ./multi_switch.sh --generic nothing happens
im in /RetroPie/scripts & folder and when i type ./multi_switch.sh --generic nothing comes up or happens

i do get it to wake up from sleep when i turn projector on and relay goes to close state.
but i doesent shut down when i turn projector off and relay goes to open state

and uhm what do i need to make it executable sorry for my noobishness =/

Edit
nvm found out how to do it

Edit 2
but still cant get shutdown to work when the relay opens the circuit and the two pins get seperated (open/not shorted) nothing happens

and when i do raspi-gpio set PIN# ip pu i get unknown GPIO PIN# im guessing PIN# is 3 then

mrfalk

Finally got it to work after few hours of bug searching
and reason was that I hade (boot to desktop auto login as pi) and change to (boot to text console auto login as pi) and Now everything workes perfectly exectly as I want it to at least hehe thx @cyperghost for all your hard work on this script was exactly what I was looking for and I would have never could have done something like this myself

//peace

cyperghost

@mrfalk

boot to text console auto login as pi

I think it is enough to just write ./multi_switch --generic & to send the process to background. Then you avoid the second text console ;)

mrfalk

It works great it boots in to EmulationStation and turns On/Off

But I encounter a problem it randomly starts it self when projector is still off and dont give out signal to relay wich means circut is open

cyperghost

@mrfalk Then there is a kind of "backstroke" somewhere. Maybe it's the relay coil itself, or the relais falls back in closed state somewhere.... Really have no idea why this is happening.

mrfalk

Yeah going to do some more bug searching I’ll get back if I’ll find what causes it //

jandalf81

@cyperghost First of all, thank you for this script. It works great with the RetroFlag SuperPi case. But I do have a feature request...

Would it be possible (and sensible?) to add fan control to this? What I mean is a way to disable the fan if the temperatures are below a certain threshold. If the temperature rises, enable the fan until the Pi has cooled down again.

I know the Kintaru Super Ursus 9000 has something like this. I don't know how they've done it, though. I looked at their installer, which executes two BaSh scripts and installs a DEB package:

https://www.dropbox.com/s/gmziwqpipzpe38l/kintaroinstaller.sh (this script is executed first, it executes the next script)
https://packagecloud.io/install/repositories/kintaro/pcb/script.deb.sh (seems to install some pre-requisites for the DEB package)
last, the package kintarosnes is installed

I tried to control the fan via raspi-gpio but have not been successful, yet. What I was successful at is reading the CPU and GPU temperature and making the PowerLED switch on and off:

#!/bin/bash

function measureTemps ()
{
	local cpuTempC
	local gpuTempC

	# header
	printf "DATE\t\t\t\tCPU\t\tGPU\n"

	while [ true ]
	do
		if [[ -f "/sys/class/thermal/thermal_zone0/temp" ]]
		then
			cpuTempCINT=$(cat /sys/class/thermal/thermal_zone0/temp)
			cpuTempC="${cpuTempCINT:0:2}.${cpuTempCINT:2:1}"
		else
			cpuTempC="n/a"
		fi
		
		if [[ -f "/opt/vc/bin/vcgencmd" ]]
		then
			gpuTempC=$(/opt/vc/bin/vcgencmd measure_temp)
			gpuTempC=${gpuTempC:5:4}
		else
			gpuTempC="n/a"
		fi
		
		printf "$(date +%FT%T%:z):\t${cpuTempC}\t\t${gpuTempC}\n"
		
		sleep 5
	done
}

measureTemps

# RetroFlag SuperPi Case
# 	PowerLED OFF
# 	raspi-gpio set 14 op pn dl

# 	PowerLED ON
# 	raspi-gpio set 14 op pn dh

Is my request even possible? I know the fan is connected to the case's PCB, but so is the PowerLED and that can be controlled!

cyperghost

@jandalf81 said in Multi Switch Shutdown Script!:

Would it be possible (and sensible?) to add fan control to this?

Well the best solution would be a PWM fan control but I'm not very familar with such things. There are so much possibilities to control fans the easiest way to do this is due an opto-isolator. Then you add an additional GPIO to just power on/off the fan. This works same like the LED control.

But to add this in the script.... No I don't think so. Because you need additional hardware. But your function could be invoked to the loop and will check button action and output CPU temperature.

Sadly you can't control the fan directly through the case.... so as I wrote. You need always additional hardware and I would stay away to directly use GPIOs as power source. The 3,3V line is only capable of 100mA current. Enough for a few LEDs, microcontrollers ... but near the edge to power a 5V fan (imho)

I know the Kintaru Super Ursus 9000 has something like this. I don't know how they've done it, though. I looked at their installer, which executes two BaSh scripts and installs a DEB package:

Looks like PWM control... take a look here
Here someone did PWM control into NESPi case

Is my request even possible? I know the fan is connected to the case's PCB, but so is the PowerLED and that can be controlled!

After long reading here is the short answer: No!
Because:
The LED is directly connected to GPIO14 so this can be controlled
The fan is directly connected to main power.... Can only be controlled like the complete case -- Power Cut!

But:
With additional hardware and some new wiring: Yes!

jandalf81

@cyperghost

Thank you very much for your reply! Although that's not the answer I had hoped for I appreciate your time and effort!
Well, I'll just turn the volume up, then... ;-)

cyperghost

@jandalf81 said in Multi Switch Shutdown Script!:

Well, I'll just turn the volume up, then... ;-)

If the fan is to loud then use following tricks:

You can try to connect to 3,3Voltage (that is PIN 1 on Raspberry GPIO header - I don't recommend this)
Let it connected to 5V and add two Si-diodes to this
like:

+5V --->|---->|------ FAN

each diode consumes 0,6V-0,7V so you've a drop to 3,8-3,6V and the fan is more silent ;) You can also use resistors but this is a bad way I do not recommend.

denisuu

This might not the right forum to be posting this, but no one else seems to want to help and I don't have enough scripting/programming skills to understand your script.

I have my pi partitioned with PINN (Retropie, OSMC and Raspbian) However your script only works on Retropie. I found another script that does work on both OSMC & Raspbian but doesn't shut down the PI completely. The standby light stays on and the fans keep spinning.

I want to add the shutdown_fan part from your script to this script: LINK

#!/usr/bin/python
import RPi.GPIO as GPIO
import os

# hide warning
GPIO.setwarnings(0)

# connect RPi numbered pin
button = 5

# hide warning
GPIO.setwarnings(0)

# pins setup
GPIO.setmode(GPIO.BOARD)
GPIO.setup(button, GPIO.IN, pull_up_down=GPIO.PUD_UP)

# wait for button press
print('Wait for button press...')
GPIO.wait_for_edge(button, GPIO.FALLING)

# activate system command
# Updated to make true safe shutdown w/emustation (incase OSMC has been added)
os.system('sudo sleep 5s & sudo shutdown -h now')

From what I understand I need parts from these parts?:

#From shutdown_fan script 
[ "$1" = "poweroff" ] && raspi-gpio set 4 op pn dl

#From multi_switch.sh scipt
echo "    PowerOnControl GPIO 4 (BCM 4), output, high, power on control!"

        pack_check raspi-gpio
        cli_parameter resetbtn= powerbtn= powerctrl= ledctrl=
        NESPiPlus ${call[@]}

function cli_parameter() {
    unset call
    local PARAMETER=$@
    for i in ${PARAMETER[@]}; do
        value="${CLI#*$i}"
        [[ $value != $PARAMETER ]] && value="${value%% *}" || value="-1"
        [[ $value =~ ^[0-9]{1,2}$ ]] || value="-1"
        call+=("$value")
    done
}

cyperghost

@denisuu Take a look here SHIM ON OFF cut power PART 1
Use this script and set the correct Pins in script. This works

denisuu

@cyperghost

I tried for more than an hour I really can't get this to work.

In THIS tutorial: Do I copy the content of SHIM ON OFF - PART ONE in part 2.a or 3.a?

I'm also confused with the pin numbers, in the other tutorial he uses pin 5 and in your script it's pin 4 or am I confusing the pin to power down with the button?

cyperghost

@denisuu I don't use OSMC so make sure the directory /lib/systemd/system-shutdown/ is available (I think it is available)

So in your tutorial follow steps till 2b

sudo nano /etc/rc.local
3.1 add above line exit 0 python /home/osmc/shutdown.py &
3.2 or /home/osmc/shutdown.py & alone can also work ;)
setup script according to link from me
4.1 change led_pin from 17 to 14
4.2 poweroff_pin = 4 is okay

No... 5 is physical pin 5 = GPIO 3 so magic are the lines import RPi.GPIO as GPIO ..... GPIO.setmode(GPIO.BOARD) in the python script.

denisuu

Thanks for the help, really appreciate it!!!

It's partially working now, now it goes to sleep and the fans keep spinning like in the original script.
I actually have a Retroflag SUPERpi case (on the other 2 scripts it dind't make a difference).

the power-switch acts a little funny now. Up is reboot and down is sleep.

All steps done: https://pastebin.com/4QcLQY7M

Edit: It's reacts exactly the same on Raspbian.

cyperghost

@denisuu Does the LED blink 3 times? You have to make the gpio shutoff script executable with chmod command. This is essential forget this to mention

Edit it is command
sudo chmod +x /lib/systemd/system-shutdown/gpio-shutoff

denisuu

Yes it blinks 3 times and powers off then after af few seconds turns on again,
or goes to sleep (depending on the possition of the switch).

I did make the script executable I forgot to add it to the pastbin. (added it now)

cyperghost

@denisuu are there any other scripts running? It is a bit hard to guess but you can try to use the original fan_shutdown script. Please install raspi-gpio with sudo apt-get install raspi-gpio