Pi doesn't boot when pins 5 and 6 are momentarily shorted

[seanspotatobusiness]

I read that the Pi 3 B can be turned on by shorting physical pins 5 and 6 but mine doesn't respond to this. It powers on if I disconnect and reconnect power but that's a bit less convenient and I wanted to use a momentary switch to trigger the power-on.

Edit: I don't want to use the button to shutdown the Pi and I don't want to use the "run" header because pressing that accidentally while powered on could corrupt the file system and lose unsaved data.

[gordon77]

It may need to be enabled by simply adding the following line to /boot/config.txt:

dtoverlay=gpio-shutdown

[seanspotatobusiness]

It may need to be enabled by simply adding the following line to /boot/config.txt:

dtoverlay=gpio-shutdown

Is that for shutting down the Pi or turning it on? I'm only trying to get a button to turn on the Pi. I don't want the button to also trigger shutdown.

[gordon77]

I believe it will do both, don't know if they can be separated.

[DirkS]

It may need to be enabled by simply adding the following line to /boot/config.txt:

dtoverlay=gpio-shutdown

How can it do startup if the Pi is not running?

From the overlays readme (/boot/overlays/README):

This overlay only handles shutdown. After shutdown, the system
can be powered up again by driving GPIO3 low. The default
configuration uses GPIO3 with a pullup, so if you connect a
button between GPIO3 and GND (pin 5 and 6 on the 40-pin header),
you get a shutdown and power-up button.

[gordon77]

I stand corrected. I think I mixed up the old and new operations.

Shorting pins 5 & 6 on my Pi3B+ causes it to boot up, if powered and previously shutdown. no change in settings required

To shutdown you can set

Code: Select all

dtoverlay=gpio-shutdown,gpio_pin=21

21 is the chosen GPIO , strangely 3 doesn't seem to work

[klricks]

It may need to be enabled by simply adding the following line to /boot/config.txt:

dtoverlay=gpio-shutdown

The overlay is only required to add shutdown function to pins 5 (GPIO3) & 6.
Startup from pins 5 and 6 is always enabled.

OP are you sure you are using the correct pins?
Type pinout at the command line.

Be sure not to connect the wrong pins else your RPi3B+ could be instantly destroyed.

[gordon77]

It may need to be enabled by simply adding the following line to /boot/config.txt:

dtoverlay=gpio-shutdown

The overlay is only required to add shutdown function to pins 5 (GPIO3) & 6.
Startup from pins 5 and 6 is always enabled.

OP are you sure you are using the correct pins?
Type pinout at the command line.

Be sure not to connect the wrong pins else your RPi3B+ could be instantly destroyed.

I couldn't get dtoverlay=gpio-shutdown,gpio_pin=3 (PIN 5&6)to shutdown BUT dtoverlay=gpio-shutdown,gpio_pin=21 (PIN39&40)does.

[DirkS]

I couldn't get dtoverlay=gpio-shutdown,gpio_pin=3 (PIN 5&6)to shutdown BUT dtoverlay=gpio-shutdown,gpio_pin=21 (PIN39&40)does.

There is a potential conflict with I2C
and on Jessie you need to add a udev rule

[gordon77]

I couldn't get dtoverlay=gpio-shutdown,gpio_pin=3 (PIN 5&6)to shutdown BUT dtoverlay=gpio-shutdown,gpio_pin=21 (PIN39&40)does.

There is a potential conflict with I2C
and on Jessie you need to add a udev rule

Thanks. It was the I2C conflict stopping GPIO 3 from shutting it down. Disabling I2C (Preferences, Pi Configuration,Interfaces etc...) and it now performs as it used to on the old OS. Connecting 5&6 shuts it down, and again boots it up.

[seanspotatobusiness]

I'm sure I have the right pins. It's pins 5 and 6 on this image:

[AdamStanislav]

I'm sure I have the right pins. It's pins 5 and 6 on this image:

So, am I right in assuming shorting pins 5 and 9 momentarily would accomplish the same? Because my RPi is in an acryllic case that uses pins 4 and 6 to power up the cooling fan.

[Imperf3kt]

You can short Pin 5 to any ground point, which includes all metal ports on the Pi. As long as you have the dtoverlay in config.txt

[AdamStanislav]

Thanks.

[DirkS]

As long as you have the dtoverlay in config.txt

You don't need an overlay for the 'GPIO start' function. You're probably confusing it with the gpio shutdown function

[mrreality13]

I'm sure I have the right pins. It's pins 5 and 6 on this image:

So, am I right in assuming shorting pins 5 and 9 momentarily would accomplish the same? Because my RPi is in an acryllic case that uses pins 4 and 6 to power up the cooling fan.

i use 1 &9 for fan and just did 5/6 for switch,works like a charm ,no more using pwr switch on pwr strip or unplugging/plugging

[tmaital]

Quick question to calrify another possible way to use this.
If I connect pin 5 & 6 and leave them connected - Pi Powers on?
If I shut down the pi while they are still connected and after shutdown disconnect pin 5 & 6 - Does this also turn the pi on or would I need to short them again?