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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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, ...
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2 votes
2 answers
232 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 ...
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2 answers
64 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 ...
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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) ...
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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)...
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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 ...
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2 votes
1 answer
51 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 ...
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-1 votes
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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 ...
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2 answers
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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 ...
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1 vote
1 answer
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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. ...
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2 votes
3 answers
106 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 ...
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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 ...
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2 votes
2 answers
226 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 ...
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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 ...
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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....
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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 ...
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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 ...
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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 ...
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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 ...
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2 votes
0 answers
4k 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. ...
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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. ...
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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 ...
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3 answers
58 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 ...
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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 ...
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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 ...
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1 vote
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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 /...
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1 vote
1 answer
991 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-...
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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 ...
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Which is more efficient for raspistill: `-vf -hf` or `-rot 180'? (Raspberry Pi Zero W)

According to the official documentation, With the camera placed upside-down, the image must be rotated 180° to be displayed correctly. The way to correct for this is to apply both a vertical and a ...
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0 votes
2 answers
627 views

How I can control an AC 220v with a relay and a Raspberry Pi 3B [closed]

I'm a newbie in this topics. I love electronics and I love the power of the boards like Raspberry Pi and I want to learn to use it by myself learning in internet, but I have a lot of lacks of ...
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Problems with the rpi zero and relay [closed]

I Have a problem... (above the relay-coil Datasheet) I want to control a single relay with my pi zero, but it seems that it doesn't have enough power. the 3.3V pin of the rpi (measured to 3.19V) works ...
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8 votes
2 answers
6k views

Starting Pi 4 with global_en

It seems that those pins can be used to start Pi 4, but I am not sure exactly how. Can a Pi 4 start after having been shut down by the shutdown menu, if I connect the two holes like below for a short ...
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5 votes
1 answer
3k views

What is the minimum power required for an RPi 4 in `halt` or `shutdown`?

I want to use a RPi 4 in a remote, unattended, battery-powered application. In this application, the RPi 4 will spend most of its time inactive, awakened only by either a Real Time Clock (RTC), or a ...
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1 answer
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turn a fan off when a power switch is toggled

I have added a power switch to turn on/off my raspberry pi 4. When I use this switch the fan connected still remains on. How would I add something to my script when the switch is toggled to turn off ...
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3 votes
3 answers
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Does Raspberry Pi 4 consume considerable amount of power in soft-off state?

In the Start menu (you know, the fruit button at the top-left corner), I clicked shutdown. I did not unplug the USB-C power cable. The red light was still on, but I thought it was like the sleep light ...
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3 votes
3 answers
392 views

Raspberry Pi 3 Model B+ got hot even in idle

My Raspberry Pi 3B Plus is running Raspberry Pi OS (32-bit) Lite. I only made update, upgrade and install Apache2. It is connected to my home network with 1Gb Ethernet cable (no WiFi). Network traffic ...
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2 votes
0 answers
43 views

Do I need to explicitly turn-off unused modules like wi-fi or hdmi to conserve power?

I just got my first PI4 to be used as a NAS with OpenMediaValut and USB3 HDD. It is connected to my router directly via ethernet. I'd like to make sure it is not consuming more power than needed for ...
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2 votes
1 answer
84 views

How to let Raspberry 4 B stop spinning the external hard disk when there is no write or read request?

Device: Raspberry 4 B; OS: Arch Linux ARM; Interface: USB 3.0 I have a Raspberry and external HDD, all the stuff's details are above. I want to automatically suspend my hard disk (in order to ...
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2 votes
0 answers
1k views

Is it possible to turn off my MHS3528 (ILI9486) TFT backlight?

I've got a TFT screen that uses the goodtft MHS35-show script. The screen works, and hooray, that's great! Except... It stays on, all the time, at full brightness. I would love to be able to turn my ...
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1 vote
2 answers
510 views

Powering using 5V rail fails

I have reviewed a lot about powering the PI using the 5V pins on the expansion connector but I have not seen the solution to this problem. Here are some of the tests I ran: (Setup: Nothing plugged in ...
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3 votes
1 answer
3k views

How should the J2 header be used on a raspberry pi 4?

The posts I found online show conflicting information on how the J2 header should be used, and seem to be derived from trial and error. None of the answers I managed to find seem authoritative; i.e. ...
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2 votes
1 answer
127 views

Which peripherals remain powered when the raspberry pi 4 model B enters poweroff state?

When I ran the command poweroff in ubuntu 19.10, I noticed that both the Ethernet port and USB ports remain powered even when the rbp4 seemed to have halted. Others using rasbian seem to have had ...
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3 votes
1 answer
620 views

Power Supply Raspberry pi 4

I have googled a lot but didn't find anything useful. Can I use any power adapter other than the official Raspberry Pi supply? Moreover, I have an Argon One Case and many people have recommended ...
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4 votes
1 answer
342 views

Power off Raspberry Pi if charger of powerbank is connected and turn back on if disconnected

I have a (maybe trivial) problem. I want to power a Raspberry Pi (more specific a SteroPi) with a power bank. The power bank has the feature, that its output is always on. So even if I plug in a ...
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1 vote
1 answer
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Best way to control power supply?

I have a system built with a Raspberry Pi 4 and an Arduino to control its startup, shutdown and reset, I have already started to design a current monitor circuit (discussed here). But one of the ...
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1 vote
1 answer
621 views

How to turn off USB chip permanently?

I am seeking ways to reduce power consumption on my raspberry pi 3B+. I've read that one of the most efficient ways is to turn off the USB chip. This link shows how to do so via the toggle commands. ...
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3 votes
1 answer
334 views

How to power a Raspberry Pi and servo motors with one power supply

I'm building a robot using Raspberry Pi and several servo motors. I'd like to power all components using a single lithium ion battery. I've looked into using a motor driver hat, but it seems the motor ...
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0 votes
2 answers
138 views

Raspberry PI 3 A+ x5 Cluster PSU Needed Recommendation

I plan to make this x5-x6 RPI 3 A+ cluster but I am no sure what USB Charger to use. I would really prefer something with 5-6 ports. I know the spec for output are 5V/2.5A and I plan to use it in ...
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5 votes
2 answers
3k views

RPi 4 consumes 2.5W when shut down

My RPi 4 consumes about 0.5A after executing sudo halt, while according to this post it should draw at least an order of magnitude less (0.069A). The green LED blinks several times then goes off, but ...
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2 votes
2 answers
2k views

how do I automatically power off the raspberry pi and cut power every night and then power it back on each day?

Background I'm a student working on research project to develop a remote wireless sensor network of data loggers. Each data logger (aka node) is going to be retrofitted to a bird feeder that reads ...
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