Raspberry Pi Stack Exchange
Raspberry Pi Stack Exchange

Questions tagged [temperature]

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

204 questions
71
votes
6 answers

What is the maximum / minimum operational temperature?

As per the title, what are the maximum and minimum operational temperature ratings of the Pi before it stops reliably working? Could this also depend on the SD card in use?
berry120
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49
votes
6 answers

How do I monitor and/or control the temperature of the SoC?

Is there a way to programmatically monitor the temperature of the BCM2835 SoC? If so, would it do any good? i.e. would temporarily suspending CPU-intensive processes have any chance to reduce the temperature? I know that one answer is that it should…
finnw
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46
votes
6 answers

How to measure temperature?

What can I connect to the RPi to measure temperature? I think devices connected to the I²C or SPI would make most sense. Here is a question about DHT-22 and other 1-wire devices. But at this stage it seems that 1-wire is difficult on the RPi due to…
John La Rooy
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32
votes
1 answer

What are the maximum operating temperatures of the components?

What are the main sources of heat on the board? What temperatures do these components reach under load?
Alex L
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24
votes
3 answers

Do I need to use a heat sink?

I ordered a Pi 3 and accessory kit here from Amazon, it comes with 2 heat sinks. I won't be overclocking the Pi, would I still need to worry about heat issues? Eventually, this will be in an enclosed area outside of the casing with plenty of air…
C-dizzle
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24
votes
1 answer

DS18B20 not listed in /sys/bus/w1/devices

I'm starting work on a fermentation monitor using the Adafruit temperature sensing tutorial, a RPi B+ running Raspbian, a 4.7 kOhm resistor and a DS18B20 to which I've soldered male breadboard pins. After wiring exactly as the tutorial states (on…
Grafton C.
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22
votes
7 answers

Multiple temperature sensors with a Raspberry Pi

I have seen plenty of examples for using one temperature sensor with the Raspberry Pi, however, how can I multiplex 5-6 temperature sensors to a Raspberry Pi? I want to read the temperature from several sources simultaneously. Can I simply assign…
jc303
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20
votes
10 answers

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 have noticed that temperature is always below 70c.…
S Andrew
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18
votes
1 answer

What is the temperature behaviour of a Raspberry Pi in an enclosure?

There has been some comment about suitable enclosures for the Pi and its temperature behaviour. Are there measured data for this?
image_doctor
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17
votes
8 answers

How to directly get CPU temp in Python?

Goal is to switch an exhaust fan at an outside data-logging station at a solar power station. The data-collection program is written in Python under Raspbian. For reading CPU temp at a command line, there is the vcgencmd command. Example in…
SDsolar
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14
votes
4 answers

How do I display the temperature from the internal sensor on a HTML page?

I am just getting into this and whilst I can display the temp via SSH, I am struggling with displaying it on the little webpage I setup on my Pi running Apache2. I followed this example…
Trido
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14
votes
5 answers

Can I use a DHT22 as a temperature sensor for my Pi?

Is it possible to use a cheap temperature sensor such as the DHT-22 with the Raspberry Pi? I have found Arduino drivers for this and many similar things, and would be comfortable porting the code to the Raspberry Pi, but my understanding is that…
chrisrhoden
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13
votes
1 answer

Why is my Raspberry Pi 2 so hot?

I have one raspberry PI and two PI-2, side by side, inside a little cupboard. I'm constantly monitoring their temperature. I'm worried because one of the Pi-2 is quite hot. The PI and the hot PI-2 are running raspbian jessie and mostly idling. The…
raven
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13
votes
2 answers

How to use a DS18B20 temperature sensor in my Pi?

I have a few DS18B20 temperature sensors. These are normally used in Arduino projects, but I don't see why not to use them with a Pi. There is a software called DigiTemp that seems to drive the device and I have compiled and installed it on the Pi.…
Tomas
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12
votes
2 answers

Get PI's temperature using C

I know you can get the temperature using the tool vcgencmd but I was wondering if there is any API I can use in C to get the temperature programatically without reading the stdout of vcgencmd ?
opc0de
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