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Is there a way to unplug the Raspberry pi safely without shutting down
Shutting down the Pi safely without SSH or a monitor?Shut down standalone pi without accessCleanly shutting down daemon on Reboot or Shutdown commandShutting down quickly (And safely)Detect when the rpi3b+ has shut down
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I'm building a kiosk app for a raspberry pi, and the final intention is that it will sit in a pelicase with all the external hardware, with one power cord in. My program has a quit button which safely shuts down the pi by running sudo halt, but it would make it easier if the pi could automatically shutdown when it detects that it has been unplugged. Could this be done if I had a capacitor on the power rails and when the power was disconnected the pi could measure the power drop and shutdown safely if it detected a loss of power? Thanks.
shutdown
asked 9 hours ago
NadimNadim
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I'm building a kiosk app for a raspberry pi, and the final intention is that it will sit in a pelicase with all the external hardware, with one power cord in. My program has a quit button which safely shuts down the pi by running sudo halt, but it would make it easier if the pi could automatically shutdown when it detects that it has been unplugged. Could this be done if I had a capacitor on the power rails and when the power was disconnected the pi could measure the power drop and shutdown safely if it detected a loss of power? Thanks.
shutdown
asked 9 hours ago
NadimNadim
61 bronze badge
New contributor
Nadim is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I'm building a kiosk app for a raspberry pi, and the final intention is that it will sit in a pelicase with all the external hardware, with one power cord in. My program has a quit button which safely shuts down the pi by running sudo halt, but it would make it easier if the pi could automatically shutdown when it detects that it has been unplugged. Could this be done if I had a capacitor on the power rails and when the power was disconnected the pi could measure the power drop and shutdown safely if it detected a loss of power? Thanks.
shutdown
asked 9 hours ago
NadimNadim
61 bronze badge
New contributor
Nadim is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I'm building a kiosk app for a raspberry pi, and the final intention is that it will sit in a pelicase with all the external hardware, with one power cord in. My program has a quit button which safely shuts down the pi by running sudo halt, but it would make it easier if the pi could automatically shutdown when it detects that it has been unplugged. Could this be done if I had a capacitor on the power rails and when the power was disconnected the pi could measure the power drop and shutdown safely if it detected a loss of power? Thanks.
shutdown
shutdown
asked 9 hours ago
NadimNadim
61 bronze badge
New contributor
Nadim is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 9 hours ago
NadimNadim
61 bronze badge
New contributor
Nadim is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 9 hours ago
NadimNadim
61 bronze badge
New contributor
Nadim is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 9 hours ago
NadimNadim
61 bronze badge
asked 9 hours ago
NadimNadim
61 bronze badge
61 bronze badge
New contributor
Nadim is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Nadim is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
3 Answers
3
active
oldest
votes
What you're asking for is impossible. There's no battery backup on the RPi without additional hardware.
Pulling the power may be OK 9 times out of ten, but every time you pull the power you risk corruption of your SDCard.
Even if you move to a HDD or SSD for the root filesystem you risk corruption with a sudden power loss.
How hard is it to use sudo poweroff then wait ten seconds for that to complete? You know it's complete when the activity LED blinks ten times.
answered 8 hours ago
DougieDougie
1,5821 gold badge2 silver badges10 bronze badges
add a comment |
To achieve this thing you need two things.
- First, the power failure detection circuit.
- A power backup system that can give power back up to shut down the raspberry pi.
There are many ways to implement the power detection circuit. I am giving an example of this
simulate this circuit – Schematic created using CircuitLab
in this circuit, the R1 and R2 you have to chose such that rpi gpio will get 3.3V, 3mA current. When power presents the gpio get a high signal failure will occur the get low signal.
For power back up you need a supercapacitor circuitry that can store 5V*2.5mA * 60sec energy minimum such that it can provide power to RPI when it performs shut down the operation.
answered 8 hours ago
PrayuktibidPrayuktibid
144 bronze badges
add a comment |
No computer system which writes to internal storage can just be powered off without risk of loss. The Pi is no different in this respect.
Conventional computers have a managed shutdown and/or battery backup.
It is not difficult to provide the same to a Pi (the additional circuitry is likely to cost more than the Pi) and there are many articles on this, and a number of commercial products.
NOTE a capacitor is unlikely to provide sufficient voltage for long enough.
The other option is to use a read only filesystem, and store working data in volatile storage (RAM) - it depends on your application if this is applicable.
answered 2 hours ago
MilliwaysMilliways
33.3k14 gold badges59 silver badges126 bronze badges
Re: your note about storing data in RAM; I have use AUFS (RAM fs + read only ext4 mount) to successfully implement a Linux driven embedded project that can handle hard power events. Something similar to what is mentioned here: linuxquestions.org/questions/linux-general-1/…
– sbell
1 hour ago
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
What you're asking for is impossible. There's no battery backup on the RPi without additional hardware.
Pulling the power may be OK 9 times out of ten, but every time you pull the power you risk corruption of your SDCard.
Even if you move to a HDD or SSD for the root filesystem you risk corruption with a sudden power loss.
How hard is it to use sudo poweroff then wait ten seconds for that to complete? You know it's complete when the activity LED blinks ten times.
answered 8 hours ago
DougieDougie
1,5821 gold badge2 silver badges10 bronze badges
add a comment |
What you're asking for is impossible. There's no battery backup on the RPi without additional hardware.
Pulling the power may be OK 9 times out of ten, but every time you pull the power you risk corruption of your SDCard.
Even if you move to a HDD or SSD for the root filesystem you risk corruption with a sudden power loss.
How hard is it to use sudo poweroff then wait ten seconds for that to complete? You know it's complete when the activity LED blinks ten times.
answered 8 hours ago
DougieDougie
1,5821 gold badge2 silver badges10 bronze badges
add a comment |
What you're asking for is impossible. There's no battery backup on the RPi without additional hardware.
Pulling the power may be OK 9 times out of ten, but every time you pull the power you risk corruption of your SDCard.
Even if you move to a HDD or SSD for the root filesystem you risk corruption with a sudden power loss.
How hard is it to use sudo poweroff then wait ten seconds for that to complete? You know it's complete when the activity LED blinks ten times.
answered 8 hours ago
DougieDougie
1,5821 gold badge2 silver badges10 bronze badges
What you're asking for is impossible. There's no battery backup on the RPi without additional hardware.
Pulling the power may be OK 9 times out of ten, but every time you pull the power you risk corruption of your SDCard.
Even if you move to a HDD or SSD for the root filesystem you risk corruption with a sudden power loss.
How hard is it to use sudo poweroff then wait ten seconds for that to complete? You know it's complete when the activity LED blinks ten times.
answered 8 hours ago
DougieDougie
1,5821 gold badge2 silver badges10 bronze badges
answered 8 hours ago
DougieDougie
1,5821 gold badge2 silver badges10 bronze badges
answered 8 hours ago
DougieDougie
1,5821 gold badge2 silver badges10 bronze badges
answered 8 hours ago
DougieDougie
1,5821 gold badge2 silver badges10 bronze badges
1,5821 gold badge2 silver badges10 bronze badges
add a comment |
add a comment |
To achieve this thing you need two things.
- First, the power failure detection circuit.
- A power backup system that can give power back up to shut down the raspberry pi.
There are many ways to implement the power detection circuit. I am giving an example of this
simulate this circuit – Schematic created using CircuitLab
in this circuit, the R1 and R2 you have to chose such that rpi gpio will get 3.3V, 3mA current. When power presents the gpio get a high signal failure will occur the get low signal.
For power back up you need a supercapacitor circuitry that can store 5V*2.5mA * 60sec energy minimum such that it can provide power to RPI when it performs shut down the operation.
answered 8 hours ago
PrayuktibidPrayuktibid
144 bronze badges
add a comment |
To achieve this thing you need two things.
- First, the power failure detection circuit.
- A power backup system that can give power back up to shut down the raspberry pi.
There are many ways to implement the power detection circuit. I am giving an example of this
simulate this circuit – Schematic created using CircuitLab
in this circuit, the R1 and R2 you have to chose such that rpi gpio will get 3.3V, 3mA current. When power presents the gpio get a high signal failure will occur the get low signal.
For power back up you need a supercapacitor circuitry that can store 5V*2.5mA * 60sec energy minimum such that it can provide power to RPI when it performs shut down the operation.
answered 8 hours ago
PrayuktibidPrayuktibid
144 bronze badges
add a comment |
To achieve this thing you need two things.
- First, the power failure detection circuit.
- A power backup system that can give power back up to shut down the raspberry pi.
There are many ways to implement the power detection circuit. I am giving an example of this
simulate this circuit – Schematic created using CircuitLab
in this circuit, the R1 and R2 you have to chose such that rpi gpio will get 3.3V, 3mA current. When power presents the gpio get a high signal failure will occur the get low signal.
For power back up you need a supercapacitor circuitry that can store 5V*2.5mA * 60sec energy minimum such that it can provide power to RPI when it performs shut down the operation.
answered 8 hours ago
PrayuktibidPrayuktibid
144 bronze badges
To achieve this thing you need two things.
- First, the power failure detection circuit.
- A power backup system that can give power back up to shut down the raspberry pi.
There are many ways to implement the power detection circuit. I am giving an example of this
simulate this circuit – Schematic created using CircuitLab
in this circuit, the R1 and R2 you have to chose such that rpi gpio will get 3.3V, 3mA current. When power presents the gpio get a high signal failure will occur the get low signal.
For power back up you need a supercapacitor circuitry that can store 5V*2.5mA * 60sec energy minimum such that it can provide power to RPI when it performs shut down the operation.
answered 8 hours ago
PrayuktibidPrayuktibid
144 bronze badges
answered 8 hours ago
PrayuktibidPrayuktibid
144 bronze badges
answered 8 hours ago
PrayuktibidPrayuktibid
144 bronze badges
answered 8 hours ago
PrayuktibidPrayuktibid
144 bronze badges
144 bronze badges
add a comment |
add a comment |
No computer system which writes to internal storage can just be powered off without risk of loss. The Pi is no different in this respect.
Conventional computers have a managed shutdown and/or battery backup.
It is not difficult to provide the same to a Pi (the additional circuitry is likely to cost more than the Pi) and there are many articles on this, and a number of commercial products.
NOTE a capacitor is unlikely to provide sufficient voltage for long enough.
The other option is to use a read only filesystem, and store working data in volatile storage (RAM) - it depends on your application if this is applicable.
answered 2 hours ago
MilliwaysMilliways
33.3k14 gold badges59 silver badges126 bronze badges
Re: your note about storing data in RAM; I have use AUFS (RAM fs + read only ext4 mount) to successfully implement a Linux driven embedded project that can handle hard power events. Something similar to what is mentioned here: linuxquestions.org/questions/linux-general-1/…
– sbell
1 hour ago
add a comment |
No computer system which writes to internal storage can just be powered off without risk of loss. The Pi is no different in this respect.
Conventional computers have a managed shutdown and/or battery backup.
It is not difficult to provide the same to a Pi (the additional circuitry is likely to cost more than the Pi) and there are many articles on this, and a number of commercial products.
NOTE a capacitor is unlikely to provide sufficient voltage for long enough.
The other option is to use a read only filesystem, and store working data in volatile storage (RAM) - it depends on your application if this is applicable.
answered 2 hours ago
MilliwaysMilliways
33.3k14 gold badges59 silver badges126 bronze badges
Re: your note about storing data in RAM; I have use AUFS (RAM fs + read only ext4 mount) to successfully implement a Linux driven embedded project that can handle hard power events. Something similar to what is mentioned here: linuxquestions.org/questions/linux-general-1/…
– sbell
1 hour ago
add a comment |
No computer system which writes to internal storage can just be powered off without risk of loss. The Pi is no different in this respect.
Conventional computers have a managed shutdown and/or battery backup.
It is not difficult to provide the same to a Pi (the additional circuitry is likely to cost more than the Pi) and there are many articles on this, and a number of commercial products.
NOTE a capacitor is unlikely to provide sufficient voltage for long enough.
The other option is to use a read only filesystem, and store working data in volatile storage (RAM) - it depends on your application if this is applicable.
answered 2 hours ago
MilliwaysMilliways
33.3k14 gold badges59 silver badges126 bronze badges
No computer system which writes to internal storage can just be powered off without risk of loss. The Pi is no different in this respect.
Conventional computers have a managed shutdown and/or battery backup.
It is not difficult to provide the same to a Pi (the additional circuitry is likely to cost more than the Pi) and there are many articles on this, and a number of commercial products.
NOTE a capacitor is unlikely to provide sufficient voltage for long enough.
The other option is to use a read only filesystem, and store working data in volatile storage (RAM) - it depends on your application if this is applicable.
answered 2 hours ago
MilliwaysMilliways
33.3k14 gold badges59 silver badges126 bronze badges
answered 2 hours ago
MilliwaysMilliways
33.3k14 gold badges59 silver badges126 bronze badges
answered 2 hours ago
MilliwaysMilliways
33.3k14 gold badges59 silver badges126 bronze badges
answered 2 hours ago
MilliwaysMilliways
33.3k14 gold badges59 silver badges126 bronze badges
33.3k14 gold badges59 silver badges126 bronze badges
Re: your note about storing data in RAM; I have use AUFS (RAM fs + read only ext4 mount) to successfully implement a Linux driven embedded project that can handle hard power events. Something similar to what is mentioned here: linuxquestions.org/questions/linux-general-1/…
– sbell
1 hour ago
add a comment |
Re: your note about storing data in RAM; I have use AUFS (RAM fs + read only ext4 mount) to successfully implement a Linux driven embedded project that can handle hard power events. Something similar to what is mentioned here: linuxquestions.org/questions/linux-general-1/…
– sbell
1 hour ago
Re: your note about storing data in RAM; I have use AUFS (RAM fs + read only ext4 mount) to successfully implement a Linux driven embedded project that can handle hard power events. Something similar to what is mentioned here: linuxquestions.org/questions/linux-general-1/…
– sbell
1 hour ago
Re: your note about storing data in RAM; I have use AUFS (RAM fs + read only ext4 mount) to successfully implement a Linux driven embedded project that can handle hard power events. Something similar to what is mentioned here: linuxquestions.org/questions/linux-general-1/…
– sbell
1 hour ago
add a comment |
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