Questions tagged [temperature]

This is for questions pertaining to the acceptable temperature ranges for the Pi and its respective parts.

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Quasi - simultaneous temperature measurements on a metal rod

I am preparing teaching material for a thermodynamics laboratory for first year Physics students. The students at this point of their study are very capable with Python data analysis, plotting etc. I ...
VG_nbi's user avatar
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5 votes
1 answer
747 views

Turn off GPIO fan when the temperature lowers by more than 5 degrees

I am able to trigger my Raspberry Pi 3B's fan to turn on at 50 °C with the following line in /boot/config.txt: dtoverlay=gpio-fan,gpiopin=3,temp=50000 However, it automatically turns off again when ...
Paradox's user avatar
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1 answer
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how do i run a script when the cpu gets too hot [duplicate]

i need to send commands to my hats that control fans and a little warning LED if the cpu goes above or below a specified state of temperature https://unix.stackexchange.com/questions/756721/raspberry-...
Robert Cotterman's user avatar
0 votes
1 answer
188 views

Get package temperature of a Raspberry Pi pico using C

I'm working on a Raspberry Pi pico and I'm using the C pico-sdk. I want to get the temperature of my package so I followed the datasheet of the rp2040 (page 565) and I've used the following code : ...
Bibibou's user avatar
  • 13
3 votes
1 answer
917 views

Raspberry PI Pico W temperature reading

I have been playing with my newly acquired Raspberry Pi Pico W and reading the temperature. How much variation between the internal temperature sensor and an external TMP36 wired up to ADC2 should I ...
Alastair Montgomery's user avatar
-2 votes
1 answer
42 views

hi i have a problem with dht11 and LED

I want to record data from dht11 and turn on the LED in the same code the dht11 work good by separate code the led also work well by separate code the problem is when I make it one py code problem ...
Asaad's user avatar
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2 votes
1 answer
2k views

How to PID control a heater with SSR, Raspberry Pi and python

I would like to PID control the temperature of a water bath using a RaspberryPi4, a solid state relay (SSR) and a heater (200W, 230VAC) using python. The IVMech library seems a good starting point. As ...
Marco Bobinger's user avatar
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23 views

HTU21 read problem

I try to read temperature values from HTU21 with pigpio, C code given below: #include <stdio.h> #include <pigpio.h> #define addr 0x40 #define rdtemp 0xF3 #define rdhumi 0xE5 #define wtreg ...
mock_up's user avatar
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0 answers
109 views

Cold start Raspberry Pi 4B? How cold?

My company recently ran tests on two Pi 4Bs in a temp chamber with camera attached. Ran 1000 hours at 70C ambient - CPU around 80-82C No issues. (power always on) Ran 1000 hours hot/cold cycle -25C ...
user3736436's user avatar
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1 answer
159 views

raspberry pi zéro 2

I wanted to ask a question. Is there a security system to shutdown the Raspberry Pi Zero 2 in the event of overheating? A hardware solution in the Raspberry Pi(a form of security) and not a software ...
user143437's user avatar
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Two 'burnt' HDMI ports on two Raspberry Pi 3B+s one after the other

Background: I had Raspbian 10 (installed over NOOB) running on a Raspberry Pi 3B+ running: BOINC (30% CPU time and 25% CPU cores used) dump1090 Kodi Kismet since July 2020, pretty much 24/7 till ...
Duck Dodgers's user avatar
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1 answer
78 views

how to detect human presence at the computer

After working from home for a while, I bought a standing desk that can move up and down. I'd like to have better understanding of my work patterns, especially these 2 metrics: how much time do I ...
Vlad's user avatar
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2 votes
2 answers
3k views

How can Rpi4B use python to talk to the I2C DHT20 / SHT20 temperature and humidity sensor?

I'm trying to use a Raspberry Pi 4 to read an I2C temperature and humidity sensor. The part I'm using is a module from Grove based on the DHT20 sensor. Here's a link to a page about the module: https:/...
thatguyfromcanada's user avatar
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89 views

Measuring CPU temperature gives error

When I run the command vcgencmd measure_temp to measure the tempearture of my Raspberry Pi, instead of expected output (e.g. temp=50.1'C) it sometimes throws an error as follows: vc_gencmd_send ...
petervanya's user avatar
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0 answers
431 views

Raspberry Pi is constantly CPU throttling

My Raspberry Pi 4, with heatsinks and 5v fan is idling at above 85 degrees Celsius constantly! Once I was simply updating via apt-get while doing other things and it ejected the SD Card as to try to ...
yaBoiDoesntKnowWhatHesDoin's user avatar
0 votes
2 answers
115 views

Can RPi control CPU temperature by itself?

i am newbie at Raspberry so maybe this question is stupid. Can RPi control CPU temperature by itself at desired point, for example 70°C? I started the RPi and tested the internet and played a movie ...
Sahasrar's user avatar
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1 answer
241 views

Very high idle temp?

My raspberry pi was very slow so I did a temperature measurement and it was 79°C at idle. This looks very high. Does anyone know what can cause this? Maybe something is broken. edit: It doesn't want ...
Tim Billiet's user avatar
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1 answer
38 views

Idle Model 4B running > 115 C = damaged? [closed]

So today I noticed a 4B I was bringing up on Ubuntu 20.04 (server) was actually crashing due to heat. I managed to stop docker etc, and captured CPU measurements of ~115 C. I was purchased late last ...
Steffen Schumacher's user avatar
1 vote
1 answer
811 views

DS18B20 (thermometer): negative temperatures are read as 4 million degrees celsius

I have five DS18B20 thermometers in my greenhouse connected to my Raspberry Pi Model B Plus Rev 1.2. It is running Raspbian GNU/Linux 10 (buster). Here you can see that the two thermometers which are ~...
Daniel Troger's user avatar
1 vote
2 answers
1k views

DHT 11 - Sensor with Raspberry Pi

OK, This is a little frustrating as I am JUST trying to get the temperature/Humidity readings on my DHT 11 sensor with Raspberry pi 4 and I am unable to do so. Please see below https://www....
Vikram Suriyanarayanan's user avatar
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0 answers
33 views

Can the GY-906 (meant for Arduino) be used on Raspberry? [duplicate]

I want to use a sensor to detect the temperature of a person. I have this sensor which is used for Arduino and I'm wondering if it can be used on the Raspberry Pi 4. Otherwise, what other choices do I ...
YJJcoolcool's user avatar
0 votes
1 answer
5k views

Comfortable long-term operating temperature for Raspberry Pi 4B [closed]

I have a Raspberry Pi 4B 8GB running non-stop under a fairly mild load. Among other things, it serves a somewhat large PostgreSQL DB, but the mean CPU usage rarely exceeds 25%. There is a Low-Profile ...
natiiix's user avatar
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0 votes
2 answers
1k 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 ...
Guille's user avatar
  • 111
19 votes
10 answers
110k views

How much temperature is normal temperature for Raspberry Pi 4

I am running a haarcascade based face detection and face recognition on Raspberry Pi 4. The CPU temperature rises to 83-84C. So I have installed a heat sink and 5v pi fan. After installing this, I ...
S Andrew's user avatar
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1 vote
1 answer
403 views

Do i need a fan, or will ventilation holes suffice?

this setup has not yet been completed. I'm only asking so I can order a fan if needed I plan on connecting the following elements directly to my pi4- relay(i think I'll need two) small LED with ...
user avatar
2 votes
0 answers
182 views

The Raspberry Pi 4 fails to reboot

I have a Raspberry Pi 4 running Ubuntu Server 18.04. I usually SSH into it and reboot the system. However, I noticed that sometimes the pi does not successfully boot up again after shutdown, so I have ...
Faisal Altassan's user avatar
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1 answer
184 views

High temp even when shutdown

Hello i just made build my first Raspberry pi4 (8Gb) build and i have run into a weird issue. When i Turn it off with (either via terminal or normal) it seems to keep sucking energy and stays warm. ...
Rene H.'s user avatar
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2 votes
1 answer
2k views

Will thermal paste help in cooling down the CPU of my Pi 4 even further?

I have the latest Raspberry Pi 4 (8gb edition), I'm using my Pi as a server to host a website, and to host a Discord bot that is being used in more than ~800 servers right now. I overclocked my Pi, ...
O S's user avatar
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0 votes
2 answers
598 views

Cooling problem

I'm going to put my raspberry pi zero in a water/air tight box outdoors, but I'm worried that it might overheat with it preforming tasks all day and sitting in the sun. Considering that, I want a way ...
UNKNOWN's user avatar
  • 79
2 votes
4 answers
410 views

connect multiple temperature sensors to rpi

I need to connect multiple temperature sensors to my RPI. can you, please, elaborate whether/how can this be done with this or this unit? or can you suggest other unit? I need to measure temp on the ...
greengold's user avatar
  • 117
2 votes
1 answer
769 views

Model 4B Running Hot

Here is my hardware/software setup: Model 4B with 4GB of RAM. Official 5V power supply (North American socket) Official case with provided heatsinks Ubuntu 20.04 (Most recent LTS, came out April 2020)...
Brian Tracy's user avatar
1 vote
2 answers
113 views

Alias quotation and escapes

I try to get a alias like this running: alias temp="vcgencmd measure_temp | sed "s/'/°/g" | sed "s/temp=/Actual CPU temperature /g"" I tried a lot to escape the quotes but I didn't got it. Probably ...
Marcusg562's user avatar
2 votes
2 answers
4k views

Rpi3B+ Python DS2482 I2C to 1-Wire Bridge Connecting 10+ DS18B20 Temperature Sensors Using 30 Metres Long CAT5e Cables

I'm about to build a heating control with DS18B20 1Wire-sensors and the Raspberry Pi 3 Model B+. For the 1Wire-interface I'm using the DS2482-800 multi-channel busmaster (more precisely this pre-...
simsnWolke's user avatar
2 votes
3 answers
9k views

Temperature measured using "psutil" and the "CPU Temperature Monitor" are different

I need to read the temperature using the python program. I am reading the CPU temperature of the Raspberry Pi using psutil module. When I call psutil.sensors_temperatures() it is returning the ...
Prudhvi's user avatar
  • 173
1 vote
0 answers
83 views

rasberry pi 3 says it's hot (50*C), but is cool to the touch

My raspberry pi 3 reports a [stable] temperature of 49.5 *C - which is pretty warm. However, when I touch all of the components with my finger, including the CPU, it does not feel hot or even a ...
charles's user avatar
  • 11
2 votes
3 answers
2k views

Does the DS18B20 1-wire temperature sensor ID change with different Raspberry Pi's?

I have set up 3 temperature sensors (DS18B20) and connected them to what I believe is a Raspberry Pi 4. I have only been using the Pi 4 for easy testing before I move everything over to the Pi zero ...
ViperSniper0501's user avatar
1 vote
1 answer
798 views

Error when trying to read out temperature with gpiozero

I am new to gpiozero. I successfully managed to make some LEDs blink, but I am struggling reading out the CPU temperature as described in the example at gpiozero.readthedocs.io. My code is pretty ...
B--rian's user avatar
  • 125
2 votes
2 answers
5k views

Controlling fan of the LABISTS Raspberry Pi4

I'm a new Raspberry Pi 4 user. I have bought the Labists Kit which includes 3 heatsinks and a fan. As far as I understand the fan is connected directly two the GPIO pins (see for example this video ...
Bakuriu's user avatar
  • 121
1 vote
1 answer
2k views

Does this flat heat sink even work for cooling?

I bought a raspberry pi 4 case, and it came with these heat sinks you see in the picture + a fan. From the sizes, I guess the flat heat sink is for the CPU. I kind of find it hard to believe that this ...
The Quantum Physicist's user avatar
3 votes
1 answer
3k views

measuring the cpu temp and gpu temp in bash and python 3.5.3+ pi 2, 3B, 3B+, 4B, Buster

Two part question. Although these questions might sound more generally like linux questions, my need is to have these answers specific to the pi. Part 1 - Does the raspberry pi 2, 3B, 3B+, 4B, have ...
always_learning's user avatar
0 votes
1 answer
102 views

Facing problems after the latest update of Buster!

I may have described some problems in my previous question. To eliminate that problem I had to flash my sd-card with the latest buster release. After that I am frequently facing these problems, 1. ...
Sohan Arafat's user avatar
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-1 votes
3 answers
510 views

Running RPi 3B without a fan or radiator [duplicate]

I am using my RPi 3B purely for feeding data Flightradar24 (with Pi24 installed instead of pure Raspbian). I assume that usage of electronics and overall load of the device is rather low. My ...
trejder's user avatar
  • 141
0 votes
1 answer
435 views

Measuring temperature by attaching thermocouple directly to the processor

I know that I can read RPi temperature through console, but I'd like to measure it using a standard, hardware thermometer. Is this possible? Can I attach thermocouple directly to the RPi's processor ...
trejder's user avatar
  • 141
1 vote
1 answer
303 views

DS18B20 Temperature Sensor RJ-x

I am looking to create a complete temperature humidity sensor system with 72 DS18B20 sensors. I am aware that each sensor receives it's own unique identifier and you are able to daisy chain them ...
Philoxopher's user avatar
0 votes
3 answers
537 views

Raspberry pi 4 gets hot while installing raspbian

I just got Raspberry pi 4 and it too hot while installing raspbian OS. > vcgencmd measure_temp temp=78.0'C Is this normal ? I installed NOOBS Lite from Windows 10 and installed in SD card. It's ...
user252521's user avatar
1 vote
1 answer
52 views

What is the hottest part, under light load?

For a hobbyist weather station project I am going to use a Raspberry Pi and a Si7021 temperature/humidity sensor. If possible, I want to use one of the available casings, and enclose my Pi and the ...
Marcel's user avatar
  • 135
2 votes
1 answer
155 views

How durable are the Raspberry Pi and the Raspberry Pi Camera?

I plan to use my Pi and the Pi camera v2 no IR version as a wildlife camera. Now my question is can I run the camera in the winter (maybe -10 degrees Celsius) and will it still work like the Raspberry ...
Spielekind's user avatar
0 votes
1 answer
407 views

No thermal throttling in Raspberry Pi 3 model B?

I am seeing that the thermal throttling doesn't work while you read the frequency from: /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq And thermal information from: /sys/class/thermal/...
15 Volts's user avatar
  • 147
0 votes
0 answers
140 views

is there a way to minimise the effect of the Pi on the Sense HAT's temperature sensor?

Is there a way to minimise the effect of the Pi on the Sense HAT's temperature sensor? I cannot seem to reduce it from mid to high 30s deg. C. Or do I really need a sensor that is external to the ...
user10570551's user avatar
1 vote
1 answer
144 views

Temperature monitor for a rifle barrel?

Is there any good Raspberry Pi tutorials for making a temperature monitor that can be used to monitor the temperature of a rifle barrel? So far, I can only find tutorials for contact-less temperature ...
Robin Alvarenga's user avatar

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