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Questions tagged [power-management]

Power Management is a feature of electrical appliances to enter a low-power state when inactive to reduce energy consumption.

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RPi zero W auto power up / down by available power

I want to run a RPi Zero W on a crude solar panel and battery or supercapacitor. I understand the pi has an input range of 80-120A or so, and needs a minimum of just 2 volts. This makes it ideal for ...
Jodes's user avatar
  • 562
0 votes
0 answers
21 views

Using a Power-on and Shutdown button with the HyperPixel4 touchscreen

I am trying to wire up my Raspberry Pi 4B to have BOTH the HyperPixel4 touchscreen and a power-on button as well as a shutdown button (From my understanding I cannot have one for both operations ...
Damon's user avatar
  • 101
1 vote
2 answers
496 views

Raspberry Pi 5 Reboot Instead of Shutdown

Yesterday I noticed that I could not access the device which is far away and when I went to check it, the power led was red and only turned back on when I pressed the power button. I didn't find ...
Azarakuss's user avatar
0 votes
0 answers
35 views

Power cycle 3V3 during reboot

I have read about having the PI4 turn off 3V3 on shutdown via the eeprom settings, WAKE_ON_GPIO=0 and POWER_OFF_ON_HALT=1, and verified that his works on my PI4. I would really like, though, to power ...
jnob's user avatar
  • 1
0 votes
1 answer
131 views

Console (not X/Wayland) screen blanker ineffective under Bookworm?

Note that I am not running X or Wayland. This is about the hardware text console. I have a pair of Pi 400s with HDMI connected monitors. If I add consoleblank=300 to cmdline.txt, what happens is that ...
nsayer's user avatar
  • 360
0 votes
1 answer
113 views

Understanding what happens with Raspberry Pi Pico in idle

I am verry new to Pico and I want to understand something. This is just a microcontroler, not a mini computer like RPi 4. From what I study so far, they say that it has a 125 MHz fixed clock and it ...
Marus Gradinaru's user avatar
0 votes
1 answer
34 views

How can I boot a Pi from a battery pack when the light level exceeds a preset level? [closed]

I have a Naturewatch camera using a PiZero powered by a large battery pack. The pack will last several days as is, but I would like the camera to be running only during daylight, for obvious reasons, ...
Nicholas Walton's user avatar
0 votes
2 answers
2k views

Raspberry pi 5 UPS and li-ion battery

Is there a UPS and lithium ion battery combo that works on the raspberry pi 5? I have looked around, but I can only find information on the RTC clock battery. I know the voltage and ampere output for ...
kgaams's user avatar
  • 9
0 votes
1 answer
193 views

One button for on/off of Raspberry Pi 4, still using i2c

I can't find any additional information online, so I'll try to ask it directly. I would like to put the Raspberry Pi 4 (with Lineage OS) in a case and be able to turn it on and off using just one ...
Max Power's user avatar
0 votes
0 answers
27 views

USB dongle for remote control doesn't wake up

A bit stumped on this one, hoping any of you fine people can assist... I have a 2.4g remote control with a USB dongle that I'd like to use on a Raspberry Pi Zero 2 W running Raspbian Lite 32bit. When ...
PepsiMax's user avatar
0 votes
2 answers
581 views

How do I prevent raspberry pi automatic turn on when I connect the power plug?

I connect the power in plug. After that raspberry pi automatically turn on . But I want it to be on when I press the button, how can I do this?
SURESH BHATI's user avatar
-1 votes
1 answer
52 views

Can I power my PI via USB if I Disable USB?

I learnt that I can disable the USB circuitry with this command: echo '1-1' |sudo tee /sys/bus/usb/drivers/usb/unbind Does doing this disable USB power too? Or just data/connectivity? I would test ...
Tom J Nowell's user avatar
0 votes
0 answers
85 views

Rasberry Pi 4 and display sleep wakes the display immediately again

Trying to figure out why the display I want in sleep mode immediately comes back on again when I tell it to sleep. For example entering xset dpms force off in the Terminal and pressing Enter will make ...
star-affinity's user avatar
0 votes
3 answers
1k views

How to turn off the Raspberry Pi fan when shutdown

I purchased the official raspberry pi 4 fan and follow the documentation to setup the fan. The fan turned on in the beginning when power on my raspberry pi 4 then it's off after finish boot up. When I ...
Xihao's user avatar
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-1 votes
2 answers
1k views

Questions on dtoverlay gpio-poweroff

I'm working on a soft-latching power control for my raspberry PI project. I want to use the 'gpio-poweroff' overlay to cut all power after the system gracefully shuts down. I have it working, but I'm ...
mkeveney's user avatar
0 votes
0 answers
24 views

Dead Raspberry Pi, Rev 1.4, please help me identify model of the chip [duplicate]

Hi! I am trying to fix shorted out Raspberry Pi 4B and I identified this chip as bad (Running extremely hot while Raspberry looks dead). The chip itself is scratched and protected from reading model ...
TekuSP's user avatar
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1 vote
0 answers
79 views

Powering Raspberry Pi 3B+ with Multiple Attachments: Recommendations for Portability

Ok so I'll try and keep this short and sweet. Basically, I have all these attachments for my Raspberry Pi 3B+ Raspberry Pi 7" Touchscreen Case for Touchscreen w/ Cooling Fan Raspberry Pi Camera ...
Liebmann5's user avatar
3 votes
6 answers
543 views

I need a seemingly large battery for project containing several sensors, what should I do?

I'm working on a project with several sensors needing various 3.3v and 5v power. I'd like to have my sensors running for at least 24 hours before needing to recharge everything. I did the calculations:...
Katianie's user avatar
  • 151
0 votes
0 answers
831 views

Disable permanently wifi power management

After adding sudo iwconfig wlan0 power off to /etc/rc.local, I checked whether it has been applied with iw wlan0 get power_save. I notice that indeed it has been applied cause I get Power save: off. ...
Gouz's user avatar
  • 115
0 votes
1 answer
95 views

LiPo Battery HAT behavior

I was reading the description for LiPo Battery HAT for Raspberry Pi and it at best seems very unclear to me: This is not a UPS! The Raspberry Pi will restart when you connect it to the Pi. What does ...
KeyWeeUsr's user avatar
  • 115
1 vote
1 answer
697 views

Wifi power management keeps turning on - Raspberry Pi 400, running Ubuntu Server

I have tried every option I could find, but no matter what I try, after rebooting my Raspberry Pi 400 running Ubuntu Server 22.04 the WiFi power management feature resets to ON, meaning the WiFi goes ...
KCpremo's user avatar
  • 11
1 vote
1 answer
553 views

Raspberry Pi 3B+ board SMT component identification

i'm a college student so i cheaped out by buying a physically damaged RPi 3B+ planning to repair it myself (also as SMT soldering practice) but am having some difficulty identifying the damaged parts. ...
petemoss0's user avatar
1 vote
0 answers
259 views

Battery Information on Raspberry Pi

I am currently using PiSugar 2 Pro for my Raspberry Pi 3B+. While I know that PiSugar has its own server where you can check on battery level, I was looking for a more direct integration with the OS, ...
Xavier Merino's user avatar
3 votes
4 answers
3k views

Raspberry pi-4 powered usb hub backfeed issues

I have a Raspberry SC15184 Pi 4 server and I'm looking to power 3 USB peripherals each with a 3-6W power requirement (which should be 0.6-1.2A given pi-4 operates at ~5V). This is above the 1.2A ...
Discombobulous's user avatar
0 votes
2 answers
179 views

Get Measurements from Battery/Solar Setup

I'm planning a setup with an rpi3b+ and the pijuice hat (battery) and pijuice solar module. It is key to my project that I can access the following data digitally i.e. in the pi: current power ...
rn42v's user avatar
  • 1
0 votes
0 answers
43 views

How to disable boot when plugged to power? [duplicate]

I want to disable boot of raspberry pi 4B when plugged to power I have searched a lot and found a similar question, which gives a short and suspicious answer to this problem. If two RUN pins(holes) ...
arm's user avatar
  • 9
0 votes
0 answers
18 views

Raspberry PI4 usb 3.0 seems not working properly [duplicate]

I am using a Raspberry PI4 with Google Coral TPU and a Telit Lte modem both attached on USB 3.0 ports. I get a lot of "Under-Voltage" messages also using the Raspberry power supply(5.1V, 3A)...
Andrea Lancioni's user avatar
0 votes
2 answers
318 views

Raspberry PI4 + Coral TPU + Telit LTE get "Under-Voltage"

I am using a Raspberry PI4 powered by the Raspberry power supply(5.1V,3A) and I have also a Coral TPU and a Telit Lte Modem attached on Raspberry USB 3.0 Ports Hub. According with the Coral Power ...
Andrea Lancioni's user avatar
1 vote
1 answer
419 views

3 12V DC motors on raspberry pi with L298N

Completely new to this stuff. For context, I am trying to connect 3 DC motors that probably are 12v. I haven't bought them yet, they will definitely be more than 5v. I want to be able to control all ...
Justin Priede's user avatar
-1 votes
1 answer
175 views

LPM raspberry pi 4B extinction mechanism

I am contacting you because I would like to know how the LPM (Low Power Mode) mechanism works on the raspberry pi 4B. In order to take advantage of this feature, according to the documentation put ...
Axel0222's user avatar
2 votes
2 answers
2k views

Turn on pi at specific time with RTC to save battery

I'm looking into powering my raspberry pi via a powerbank. I already have a button and a relay to turn it on manually and when the pi shuts down flip the relay back to off position. Now I would like ...
Qorzyking's user avatar
0 votes
1 answer
97 views

How to shut down the RPI4 for a certain time or prevent it to turn on power on booting

For my project, I access the RPI remotely. The RPI continuously powers sensors over its 3.3vdc rail. For testing & troubleshooting, I would like to cut current to those sensors for some time. ...
Marco Bobinger's user avatar
1 vote
3 answers
605 views

Can I turn On and Off my Raspberry Pi 3B+ on a specific time?

I have my Raspberry Pi 3B+ powered via Solar Panel. And I know that Raspberry Pi especially 3B+ have low power consumption unlike any other Raspberry Pi version. Though Power Consumption was not that ...
Little Intoxicated's user avatar
-1 votes
1 answer
384 views

How to turn on a remote battery-operated Raspberry Pi (accessible by Wifi or SSH)?

I am running a cluster of Pi3 and Pi4. Each node runs on a battery and is powered by a solar panel, in a remote area like a farm with no grid. Pis are connected to each other by WiFi in a local ...
Mohammad Sadegh Aslanpour's user avatar
2 votes
2 answers
2k views

Cut power supply to pi after shutdown and power on after button press

I am building a pi project that is battery powered and is powering something through the 5V GPIO. What I want the pi to do is to start up on a button press, do its thing and turn itself off again ...
Qorzyking's user avatar
0 votes
0 answers
283 views

Cutting power to USB port on a RPi 3A+

I am running a Raspberry Pi 3A+ in my car as a DIY Android Auto head unit (using Crankshaft). In order to not have the RPi immediately shutdown when you remove the key from the ignition (or have it ...
Compizfox's user avatar
  • 101
0 votes
2 answers
1k views

Seagate Ext HDD Power Down

I’ve just used a Pi 3 B+ and a Seagate 2TB external USB hard drive (SRD00F2) to make a home media server using OpenMediaVault. The drive light is on all the time, even when I’m not accessing the drive....
Alan's user avatar
  • 113
2 votes
0 answers
65 views

The RPi 4 does not support Power Management - is it due to lack of capability, or lack of will?

It's clear enough from this Q&A and the null output from cat /sys/power/state that the Raspberry Pi does not currently support the Linux kernel's Power Management features. This explains why there ...
Seamus's user avatar
  • 22.2k
-1 votes
1 answer
350 views

Pi zero doesn't fully shut down after adding a gpio-poweroff dtoverlay to /boot/config.txt

Disclaimer I'm still learning about the device tree in general and am definitely fumbling about a bit. The problem Pi Zero W draws basically zero current when shutdown with sudo shutdown now. After ...
Rasmus_SB's user avatar
-1 votes
1 answer
57 views

Maximum usage USB and GPIO power consumption

I use a raspberry Pi3B+ for a home automation installation. On which I have connected several peripherals. In particular an RFID reader and an OLED screen. But I notice that after a while, these ...
Goa_From_Gaia's user avatar
0 votes
0 answers
37 views

Turning switch on lowers voltage from 5.2v to 3.0v

This is probably a simple question, but I’ve researched a lot and haven’t been able to figure out how to fix the problem. Basically, I have a Raspberry Pi and a 5-inch LCD screen wired to a toggle ...
Brandon Pyle's user avatar
3 votes
1 answer
14k views

Raspberry Pi Pico - how to lower power consumption

I am using a Raspberry Pi Pico to provider a pacemaker signal to a broken flip clock that needs to trigger a change every 12 hours. As a proof of concept this works and does what it's designed to do. ...
Peter Bridger's user avatar
1 vote
1 answer
79 views

How to supply multiple servo motor and dc motor while using gsm module?

I've started rc plane but with internet connection instead of regular radio. My plan is using Ai-thinker A6 gsm module so I can use it as live stream camera and control servo together with blynk. ...
RxGianYagami's user avatar
0 votes
1 answer
352 views

External WiFi dongle goes to sleep despite power management set to off

I am running a Raspberry Pi Zero W as a headless audio player. Since the WiFi-signal in my kitchen is weak, I added an external TL-WN722N v2 WiFi Dongle which greatly improved signal strength. My ...
stainless's user avatar
0 votes
3 answers
70 views

Performance of the Rasperris

The Raspberry pi 4 has a power supply that can deliver a maximum of 15.5 watts. How much power exactly does the Raspberry use without overclocking at maximum power so that I can connect the ...
BabyBoy's user avatar
  • 101
1 vote
2 answers
2k views

Using Relays to Power off then Cut power to Pi Zero

I have a raspberry pi zero that I am running off a battery for remote logging reasons. There is a low battery shut off module I have connected to the battery in case the battery gets below a certain ...
blueskies's user avatar
-1 votes
1 answer
380 views

Using a SPST switch with GLOBAL_EN and GND on Pi4 B

my first post here. Thanks for having me. I've seen many posts discussing the use of GLOBAL_EN and GND for turning the Pi4 on. I'm interested in using this to turn the Pi4 OFF and leave it OFF long ...
mall_face's user avatar
1 vote
0 answers
409 views

Change the CPU Core Voltage from terminal

I was wondering if anyone is aware of how I can change the CPU Core Voltage of a Raspberry Pi using system calls from the terminal. I know that we can do this by setting the over_voltage parameter in /...
noobcoder's user avatar
1 vote
1 answer
1k views

Power consumption of Raspberry 400 when in deep sleep via Fn-F10

have anyone measured power consumption of the newly-introduced "off" state via long-press of the Fn-F10 combination on the Raspberry 400 model? https://www.raspberrypi.org/blog/designing-...
lzap's user avatar
  • 113
0 votes
1 answer
3k views

Disable USB driver on RPi Zero W

I am using a Raspberry Pi Zero W running Raspberry Pi OS (32-bit) Lite (Aug 2020). This is an IoT project where, I have a USB modem that makes my internet connection. When the modem is powered on it ...
Beaker's user avatar
  • 37