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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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26 views

Power management in Windows IOT

Because my project is in the field and not in a lab, power consumption is a significant issue. According to specification an idle Raspberry Pi 3B+ bare board has a current draw of 330mA. Long term ...
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0answers
23 views

How to do I reenable display sleep?

I recently installed a Hyperpixel touchscreen on my Raspberry Pi 3, but I don't want to leave the screen on 24/7 to avoid damage and because an always-on display doesn't fit my use case. Before I put ...
2
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2answers
44 views

On/off via UI or Sleep?

I will be using the Raspbian Lite OS. I want my Users to be able to switch the device on/off. I am using a battery source for the main application. I was thinking of providing kiosk browser UI (...
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0answers
20 views

Several relays power consumption on RPi Zero

I'm making a element, where my RPi zero turns on/off 4 relays (REES52 Optocoupler 4 Channel 5V Relay Module). I want my circuit to work constantly for as long as possible (ideally for several years) ...
2
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2answers
46 views

How can you detect if a USB device is powered via an USB Port?

I need to power a Raspberry Pi through the USB port of another computer. Is there any way to detect on the PC if the RPi is powered on? Running dmesg as well as lsusb commands on the PC didn't show ...
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1answer
120 views

How to hack power bank with timer to power cycle Raspberry Pi

... without an Arduino (if possible). I am aware there are well-made solutions like the WittyPi, RTC-Arduino circuits, and some others with relay switches. If a power bank is directly connected to ...
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0answers
125 views

Turn On Raspberry Pi and Modem GSM/GPRS with only raspberry

I am new in Raspberry and I am looking a way to turn on my raspberry and my modem GSM/GPRS with only the switch of the raspberry. I am using Raspberry Pi 3 model B and this modem: https://www....
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0answers
14 views

On at dawn switch for RPi power

I have an RPi with some sensors that runs off a battery and takes photos on boot. I want to have a switch with a photosensor that will turn it on at dawn to save power. Most switches turn on at dusk ...
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0answers
23 views

Enable devices ONLY when needed?

I am looking to create several battery-powered RasPi Zero based cameras, and as such need to keep power usage to a minimum. I intend to use a RasPi Zero W, and attach a ZeroCam NOIR camera. I want ...
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2answers
179 views

Raspberry pi 12v relay

I have bought this relay: https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F262722739443 In the '1 channel 12v relay' variety I am going to be using it to power ...
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1answer
97 views

Where to connect PWR_LOW_N?

We're developing a compute module board, and added the undervoltage circuit. Unfortunately, I cannot find where to PWR_LOW_N is actually connected. I have found some saying it's connected to GPIO 35 ...
3
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1answer
275 views

Which Linux driver does control the PMIC of the Raspberry Pi 3B+?

The Raspberry Pi 3B+ contains the MaxLinear (previously Exar) MxL7704 power management chip (PMIC) with I2C interface for "on-line" reconfiguration of power sequencing and internal voltages.1 This is ...
2
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1answer
978 views

What logs can I check to see if WiFi power management is still enabled

I have followed a couple of posts on here to turn off power management, but every morning I wake up after rebooting my pi the night before, my wifi has stopped working. By stopped working I mean I ...
1
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1answer
244 views

Autonomous Raspberry Pi [closed]

I'm looking for a way to have an autonomous Raspberry Pi. The idea is to have a Raspberry Pi outdoor, with a camera, + possible weather sensor and Wi-Fi mesh (I might looking for too much...) Any ...
1
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0answers
24 views

Does the Pi GPU active state turn on all the QPUs, even if all are not being used? [closed]

I have a USB power meter bridging the power supply and my Pi's power adapter. I wanted to measure the power consumption for Pi's GPU when it is handling various processes. Using QPULib, a library that ...
5
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3answers
308 views

How to halt Pi without turning off USB?

How do you safely shutdown or halt the Pi without turning off USB power? I have an application where an Arduino is connected to a Pi via USB. The Arduino manages a battery that powers both it and the ...
1
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1answer
707 views

dtoverlay=gpio-poweroff not working on raspberry pi 3 B

Problem: I have a Raspi 3B rev: a02082 (Q1 2016 3 Model B 1.2 1 GB (Mfg by Sony)) running raspbian jessie kernel 4.9.35-v7 I want to signal to a power management circuit that filesystems ...
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0answers
163 views

Using Raspberry Pi with Powerbank Accumulator

I wanted to power my Raspberry Pi 3B plus some sensors and an additional Huawei modem with a Powerbank. When turned on that's no problem, everything works fine. But I want to measure some enviromental ...
0
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1answer
83 views

Turn Raspberry Pi off but keep the RAM powered?

Is it possible to turn almost everything on a Raspberry Pi off (CPU GPU etc), except for the ram? Basically putting the Pi in a low power state but preserving whatever it was doing at the moment on ...
0
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0answers
4k views

wlan0 not associated and No wireless interface found

I have a Raspberry Pi 3 with built-in wifi card. When I do run ifconfig I can find the wlan0 device. Before I never had a wifi problem until I connected the Raspberry Pi to my TV through the HDMI port....
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0answers
365 views

How to turn display on and off on Windows IoT?

I've got a Windows IoT UWP app wherein a motion detector will turn the display on if someone is in proximity, and then turn off after a period of no motion detected. The LCD in question is this one. ...
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1answer
240 views

using an rpi as IP camera with minimal CPU usage?

I'm trying to get a pi happening as an IP camera, using a CSI camera module. I'd like to minimise CPU usage. I don't need motion detection, just to dump an image from the camera onto the network where ...
0
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1answer
73 views

Killing Power at GDM3 Login

I understand that killing power to a running pi without first shutting down can damage the SD card. Can Killing power at the GDM3 login screen also damage my SD card or do I need to run the GDM3 ...
0
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1answer
136 views

How many amps does a pi with 11 sensors need?

I have received so much support from this community by reading already answered questions. But now I got one that hasn't been asked yet. I have nearly a dozen sensors connected to my pi 3 so it's only ...
0
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1answer
28 views

3.5" TFT screen keeps hibernating

I have been working with my RasPI 3 (using Jessie) for a little while on a project that I am SO CLOSE to finishing. Right now the main problem I am having is that I cannot keep the frigging screen ...
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1answer
3k views

Screen Blanking on console in Raspbian Stretch (Debian 9)

I've burned the new Raspbian Stretch Lite image onto a SD Card and use this as my development system. I was used to turn off screen blanking on the console by changing the BLANK_TIME in /etc/kbd/...
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2answers
46 views

Help with resistors

I have a raspberry pi 3 that runs on 5.1v but I have a battery that is 7.4v, what transistor do I need so I don't fry the rpb3?
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1answer
1k views

Reduce power consumption script

I have read on this blog that you can reduce power consumption: https://www.jeffgeerling.com/blogs/jeff-geerling/raspberry-pi-zero-conserve-energy By disabling the HDMI port. He says that I should ...
0
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1answer
88 views

How to connect 2 boards to a raspberry pi 3

I am building a home console stereo and I am going to use an RPi3 with a hifiberry dac+. And I am wondering if I can use a waveshare power relay to be able to control the power to the system from my ...
0
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1answer
43 views

Raspberry pi power issuses

i just want to supply power for other devices which uses 5 v dc from the raspberry pi by cutting and soldering the wires and also i want to connect all the USB ports with mouse keyboard WI-FI dongle ...
5
votes
1answer
1k views

Log undervoltage

So I have a pi running Kodi, when it's in trouble it gives a powerbolt on the screen. Great. Now I know. Secondly I have a pi as a webserver headless 100% of the time. How can I log/see if it suffers ...
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2answers
565 views

Wake raspberry pi NAS on LAN

I build myself a NAS using my raspberry pi model b with an external power hub with 2 connected hdd's. Instead of leaving everything always running, I want it to only run while it has to. So I need ...
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2answers
6k views

Pi Zero W power through usb socket

Can I power a Pi Zero W and still use the usb hub at the sametime with this?
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2answers
2k views

Can the 5V and 3.3V power pins be used to power multiple devices?

I am building a device that will be controlled by several digital encoders, all which are hooked up to the device's Raspberry Pi 3 model B. I know this may be a trivial question but bear with me as I ...
1
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1answer
68 views

Will the Powerboost and Sleepy Pi be able to work together for my device?

I'm trying to build a portable PDA like device, based on a RPi and am currently in the process of working out my hardware requirements. I was looking at the Powerboost 1000C for the purposes of being ...
1
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0answers
51 views

How to determine from hardware, when I can shut off a Raspberry Pi 3

I am wiring up a raspberry pi to use a battery supply and I would like it to be a single switch controlling its power. Obviously, I don't want to cut power when its running, but I also don't want two ...
0
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1answer
335 views

Will low power indicator come up on any os(retropie) if power is low?

I'm building a portable gaming system and I have a power bank coming in for it I want to know if it will indicate a warning if my "battery" is not supplying enough power so I know when to shut it ...
5
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1answer
3k views

How can enable Deep sleep mode in Rasberry PI

If mains fails and my device is working in battery mode I would like to disable Ethernet, USB, HDMI, turn off the LCD backlight etc. Is it possible to disable these modules? My device battery is ...
3
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1answer
4k views

Cut GPIO power on shutdown

I'm developing a project where I have a button connected to the Raspberry Pi GPIO where it sends shutdown command when pressed for 3 seconds. I also have a 16x2 LCD that outputs status messages. When ...
2
votes
1answer
2k views

Home energy monitor devices

I'm making use of multiple Raspberry Pi's to monitor my home's temperature, humidity, e.t.c... I would now like to add home power use monitoring. I've done a fair bit of research, but I've not found ...
3
votes
1answer
1k views

Will RPI3 power down an external USB hard disk if not used for a certain amount of time?

Supposing I am more interested in power consumption than the lifespan of the HDD, does Raspberry Pi 3 power down automatically an external USB hard disk? If it doesn't do it automatically by default, ...
0
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1answer
941 views

Power Supply for PI Zero [duplicate]

I was thinking about getting a cable for Pi Zero, this one: https://www.adafruit.com/products/1995 But it's 2.4 ampere, won't that overcharge the little Pi Zero and damage it? The specifications say ...
3
votes
2answers
16k views

How do I turn my pi3 back on?

I'm using the LibraELEC image on a new Pi3. When I navigate to the power icon (using mouse on the desktop, or the corresponding button on a remote control) it offers a menu for cancel, reboot, or ...
1
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1answer
980 views

Raspberry pi powering issues

I am using Raspberry Pi 3 with latest pixel image: Linux raspberrypi 4.4.21-v7+ #911 SMP Thu Sep 15 14:22:38 BST 2016 armv7l GNU/Linux In the right top corner of the connected lcd screen, there is a ...
1
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2answers
604 views

Powering Raspberry Pi 3 alternatives

I am starting my first raspberry pie project and I am essentially going for a entertainment center. I ordered a 2.5A power adapter to provide power to the unit, but was wondering if it was possible to ...
0
votes
1answer
571 views

Wake display, via trigger and then have it sleep after n minutes?

We are looking at mixing a PIR (motion sensor) with a Raspberry Pi, such that the screen will turn on when motion in sensed and then sleep after a certain period of no sensed motion. The screen will ...
3
votes
1answer
13k views

RPI3 USB port current?

I am using a RPI3 and have a GPS USB module and 3g USB dongle connected to the USB ports of the pi. I am using a 5 volts, 2.4 amps power supply. I was wondering if the RPI3 USB ports provide 1.2 Amps ...
1
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2answers
640 views

Is halted a viable state for a battery powered pi zero long-term?

I'm building a battery powered device with a pi zero. The battery is a 3.7v LiPo w/ 2000mAh. I want to be able to safely shutdown and restart the pi using a single switch or button. (preferably ...
0
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0answers
51 views

Check if battery Powered or plugged in

How do I check if my Raspberry Pi is Powered by a Powerbank (or something similar) or if it is plugged in into a regular Socket? I can't find much on this. Edit I am building some Homeautomation ...
1
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0answers
384 views

Temporarily put a Pi into energy efficient mode (disable HDMI, avoid X Windows)

I want to deploy a RPi 3 in quasi-headless mode, i.e. no display attached, with an application running that takes time-lapse photos (with the standard camera module). Power is supplied through a ...