mcduman
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Re: Pi 3 in shutdown state draws 220mA

Wed Mar 16, 2016 12:33 pm

fanoush wrote:my Pi3 draws ~100mA after shutdown.,140mA with hdmi2vga converter attached and it was always like that. Did apt-get update/upgrade yesterday.
chrisoh wrote:On all previous models it drops to a bare minimal, but with the Pi 3 it remains almost the same as when it is up and running.
In fact all models are like that more or less, the
*** Fun Fact ***
Any turned-off Raspberry Pi that's still plugged in: 15mA to 30mA
is not true (at least at 5V). My model B draws 110mA after sudo poweroff with nothing attached except power (i.e. more than pi3).
Actually the model B can idle at 100mA with HDMI off and usb disabled and after sudo poweroff the power draw goes up :-)

on a separate note, did you manage to disable usb without disabling the ethernet. i would be very interested to know how. thanks in advance

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PandaLion98
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Re: Pi 3 in shutdown state draws 220mA

Fri Mar 18, 2016 12:06 pm

I'm not sure if this is still applicable to the Pi 3, but I've done some tests with my B+ (my Pi 2 is busy server-ing).

Test conditions/parts used:
Proven/known good-quality Samsung power brick
calibrated USB ammeter
vanilla Raspbian
Left running for 2 minutes after action/command is executed to make sure the reading isn't just a random fluctuation.

Note: It's not exact because of the meter's limitations (measures by multiples of 10 mA or 0.01 A)

Here are my findings:
When the Pi is powered up without an SD card, it draws more or less 20 mA.
When it is shutdown using "poweroff" or "shutdown now", it draws more or less 10 mA.
When it's stopped using "halt", it draws a steady 210 mA.

See pics below (meter is upside down. Bear with me):

Plugged in without an SD card: http://imgur.com/Q3RhipQ
Image

Stopped using "halt": http://imgur.com/wBE9PLn
Image

Stopped using "shutdown now": http://imgur.com/YmqLFMN
Image

Stopped using "poweroff": http://imgur.com/sGH5CfG
Image
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Massi
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Re: Pi 3 in shutdown state draws 220mA

Fri Mar 18, 2016 1:13 pm

can't we use a Raspi to manage image attachments on this forum? :lol: :lol:

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jojopi
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Re: Pi 3 in shutdown state draws 220mA

Fri Mar 18, 2016 1:13 pm

PandaLion98 wrote:When it is shutdown using "poweroff" or "shutdown now", it draws more or less 10 mA.
When it's stopped using "halt", it draws a steady 210 mA.
That is correct behaviour. The man pages always said that halt is different from poweroff, and shutdown has options to choose. However in wheezy/SysVInit, halt (without -f) actually resulted in poweroff, and some people may have got into the bad habit of using it because it is less typing.

Incidentally, my Pi3 draws about 85mA in poweroff, and just over 500mA at halt. That halt figure is about twice the current drawn at idle, so something is obviously spinning.

mikerr
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Re: Pi 3 in shutdown state draws 220mA

Fri Mar 18, 2016 2:54 pm

PandaLion98 wrote:I'm not sure if this is still applicable to the Pi 3, but I've done some tests with my B+ (my Pi 2 is busy server-ing).

Test conditions/parts used:
Proven/known good-quality Samsung power brick
calibrated USB ammeter



Note: It's not exact because of the meter's limitations (measures by multiples of 10 mA or 0.01 A)
Those usb ammeters are known to be inaccurate at less than 100mA - it's better to use a multimeter

Here are my findings:
When the Pi is powered up without an SD card, it draws more or less 20 mA.
When it is shutdown using "poweroff" or "shutdown now", it draws more or less 10 mA.
When it's stopped using "halt", it draws a steady 210 mA.
I strongly doubt it's actually using less than 60mA - even with no sd card.
Pi's relatively high usage even when off (>60ma) means I often have to use an arduino to control power in battery applications.

Fired up my pi2 (no usb - just ethernet)

Idle: 310mA
CPU loaded: 455mA
usb buspower off: 200mA

Code: Select all

sudo bash -c "echo 0 > /sys/devices/platform/soc/*.usb/buspower ; sleep 10 ; echo 1 > /sys/devices/platform/soc/*.usb/buspower"
sudo shutdown: 80mA
sudo poweroff: 80mA
sudo halt: 381mA :shock:

Something's up with that halt figure though - used to be same as shutdown in wheezy.
Last edited by mikerr on Sun Mar 20, 2016 2:04 pm, edited 1 time in total.
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DougieLawson
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Re: Pi 3 in shutdown state draws 220mA

Sat Mar 19, 2016 9:16 am

Massi wrote:can't we use a Raspi to manage image attachments on this forum? :lol: :lol:
If you want to host them on a RPi then yes, but it's easier to host the pics on http://imgur.com
Note: Having anything humorous in your signature is completely banned on this forum. Wear a tin-foil hat and you'll get a ban.

Any DMs sent on Twitter will be answered next month.

This is a doctor free zone.

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PandaLion98
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Re: Pi 3 in shutdown state draws 220mA

Sat Mar 19, 2016 12:37 pm

mikerr wrote: Idle: 310mA
CPU loaded: 455mA
usb buspower off: 200mA

Code: Select all

sudo bash -c "echo 0 > /sys/devices/platform/soc/3f980000.usb/buspower ; sleep 10 ; echo 1 > /sys/devices/platform/soc/3f980000.usb/buspower"
sudo shutdown: 80mA
sudo poweroff: 80mA
sudo halt: 381mA :shock:

Something's up with that halt figure though - used to be same as shutdown in wheezy.
It seems you're right. Here are the figures using a not-bad multimeter. All of these are pretty steady (not much fluctuations):

Pi when first plugged in with no SD card: 52.2 mA (no pic, sorry)
Pi with no SD card (about 5 seconds after plugging in): 75.5 mA
"sudo poweroff" and "sudo shutdown now": 57.1 mA
"sudo halt": out of my meter's range, USB current meter reads 230 mA

Moment when SD card was inserted without power cycling: 75.9 mA. I think my SD card consumes 4 mA of power.

Pics:
No SD card: http://imgur.com/4fO3cn0
Image

SD card plugged in without power cycle: http://imgur.com/xb0ZkGE
Image

"sudo shutdown now": http://imgur.com/xb0ZkGE
Image

"sudo poweroff": http://imgur.com/qIOYlVJ
Image

"sudo halt": http://imgur.com/gINM5fe
Image
Last edited by PandaLion98 on Sun Mar 20, 2016 6:37 am, edited 2 times in total.
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PandaLion98
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Re: Pi 3 in shutdown state draws 220mA

Sat Mar 19, 2016 12:44 pm

DougieLawson wrote:
Massi wrote:can't we use a Raspi to manage image attachments on this forum? :lol: :lol:
If you want to host them on a RPi then yes, but it's easier to host the pics on http://imgur.com
Agreed.
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Douglas6
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Re: Pi 3 in shutdown state draws 220mA

Sat Mar 19, 2016 1:49 pm

mikerr wrote:Something's up with that halt figure though - used to be same as shutdown in wheezy.
Possibly related is the fact that 'halt' no longer triggers the 10 LED flashes like it used to. Bug, or feature?

gregeric
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Re: Pi 3 in shutdown state draws 220mA

Sat Mar 19, 2016 3:05 pm

PandaLion98 wrote: Pi with no SD card: 75.5 mA
"sudo poweroff" and "sudo shutdown now": 57.1 mA
"sudo halt": out of my meter's range, USB current meter reads 230 mA

Moment when SD card was inserted without power cycling: 75.9 mA. I think my SD card consumes 4 mA of power.
Your first figure needs qualifying:

The initial draw with no SD card inserted is ~52mA - that's while only the SD host hardware block is turned on for an attempted boot from uSD. About 5 seconds later, the Synopsys USB controller is finally turned on for an attempt at USB boot, then the current draw rises to ~75mA.

Boot VC4 baremetal from uSD & the current stays at ~52mA.

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PandaLion98
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Re: Pi 3 in shutdown state draws 220mA

Sun Mar 20, 2016 6:48 am

gregeric wrote:
PandaLion98 wrote: Pi with no SD card: 75.5 mA
"sudo poweroff" and "sudo shutdown now": 57.1 mA
"sudo halt": out of my meter's range, USB current meter reads 230 mA

Moment when SD card was inserted without power cycling: 75.9 mA. I think my SD card consumes 4 mA of power.
Your first figure needs qualifying:

The initial draw with no SD card inserted is ~52mA - that's while only the SD host hardware block is turned on for an attempted boot from uSD. About 5 seconds later, the Synopsys USB controller is finally turned on for an attempt at USB boot, then the current draw rises to ~75mA.

Boot VC4 baremetal from uSD & the current stays at ~52mA.
Yes, I did observe that, but I thought it was insignificant. I added it to my previous post. Thanks for pointing that out.
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pPhil
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Re: Pi 3 in shutdown state draws 220mA

Sun Sep 11, 2016 12:48 am

wondering what power readings you get if connecting to rip without a card
*reply not needed. sorry missed whole second page of posts
Last edited by pPhil on Sun Sep 11, 2016 1:08 pm, edited 1 time in total.

mikerr
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Re: Pi 3 in shutdown state draws 220mA

Sun Sep 11, 2016 11:25 am

Network boot ? PXE booted pi3 into raspbian jessie desktop - no SD just rj45 and hdmi connected:
around 320mA idle
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