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Questions tagged [temperature]

The tag has no usage guidance.

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0answers
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Arduino Peripherals for Sensing in Arctic [migrated]

I've been checking the forum and Google but still haven't got precise solution to my current question. In short, we are looking for rechargable batteries for Arduino that survive under -40 Cenlcius ...
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0answers
12 views

PT100 and MAX31865 readings showing wrong

I am using PT100 (3 Wire) to measure the temperature with Arduino Uno and MAX31865. I have connected everything perfectly. Configuration in the code i am using is : max1.begin(MAX31865_3WIRE); And ...
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1answer
34 views

Software and Hardware serial same time [closed]

Im using Arduino MEGA and using Hardware serial 1 and one software serial interface for communicate two different devices Nextion HMI(hardware serial 1) and Modbus temperature controller(software ...
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2answers
27 views

DHT11 + ESP plus Arduino [closed]

Someone could help me? I want to use dht11 with arduino and esp. Both will read data from dht11 the problem is that simultaneously cannot be done. So the solution will be to set one as a master and ...
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2answers
111 views

my LM35 temperature sensor gives weird measurements,

Board: esp32 I know my wiring is correct because I get data from the sensor, but the data is a bit weird. At 22 celcius I get 140, even though if I do the voltage calculation (* 0.473372) it still ...
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1answer
27 views

Interpreting pull-up values Rp and Rpu in AM3202 (DHT22) datasheet [closed]

In the AM2302 datasheet at page 3, table 4, it gives min, typ and max values for Rpu (that the pull-up resistor as it says verbatim) being 30K, 45K and 60K ohm respectively. Elsewhere in the same ...
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2answers
48 views

RC-oscillator calibration in real time

This pesky watchdog RC oscillator is at the limit of its 10% tolerance already at room temperature. i was looking to bringing it to more like 5% (it stems from an internak 128 kHz RC oscillator) and ...
0
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1answer
268 views

Nan values in Egg Incubator

I've recently built my Arduino Incubator, which consists of a DHT22 sensor, an LCD Keypad Shield, some fans, resistors, e.t.c. I uploaded the sketch, and everything seemed fine. However, when I try ...
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1answer
64 views

Learn Arduino Basics : Temperature sensor with LCD Display and Potentiometer setup [closed]

I have temperature sensor, potentiometer and LCD screen attached to mini breadboard and wired to an Arduino. My temp sensor appears to be working fine however sometimes it reads inaccurate numbers ...
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2answers
277 views

7 segment display blinking

i'm not a professional in arduino code, when i want to display the DHT22 temperature and humidity sensor in 3 digit 7 segments , always the display show the sensor value and after 2 or 3 sec the ...
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1answer
38 views

Adjustable temperature [closed]

How can I make a project where I can adjust a temperature with buttons and a display and if the temperature is higher than that I set, a led turn on ?
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0answers
106 views

Arduino shuts off randomly (Temperature?)

I've got an Arduino Uno running in a case, with a Fona 808 shield from Adafruit on top. It's used as a location tracker; it'll get the current GPS location three times a second, then send the average ...
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1answer
373 views

LMT 84 temperature sensor measurement error

I want to measure atomospheric temperature with arduino sensor i am using is LMT84. data sheet :http://www.ti.com/lit/ds/symlink/lmt84.pdf After uploading following code to arduino board i am ...
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1answer
187 views

I keep getting an error message and I don't know how to fix it

I am using an Arduino Genuino, this is what comes up Multiple libraries were found for "LiquidCrystal.h" Used: /home/user/Arduino/libraries/LiquidCrystal Not used: /opt/ArduinoIDE/libraries/...
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vote
1answer
415 views

Temperature control using a DHT11

I am trying to do a project on temperature control and found an example but cannot get the code to work. I have read forums and tried to fix the issue which is below the code. Code: #include<DHT....
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2answers
1k views

Fluctuating readings of LM35 temperature sensor (+- 5°C) with Arduino UNO

I am trying to read a LM35 temperature sensor with Arduino UNO which I got as a gift. The issue is the fact, that my readings of sensor are, well, suspicious at least - they jump with each reading ...
2
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2answers
231 views

Merging arduino code

I have a project where we need to create a virtual cane for blind people and it will have 3 functions: Pressure button when pressed will connect to an android phone through HC-06 Bluetooth modulo to ...
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2answers
483 views

2 sensors, add delay between each reading

I have two temperature sensors, an MCP9808 and a DS18B20, connected to an arduino and I've read that it could be advantageous to set a small delay between temperature readings. What I wonder is where ...
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0answers
49 views

Different behavior when Arduino Micro powered by laptop USB vs portable charger USB

I'm working on a project that uses an LM35 temperature sensor to control a few LEDs. Above 97 degrees, one LED should switch on. Below 95 degrees, it should switch off and the other should switch on. ...
1
vote
1answer
56 views

Lifespan of a hot microchip [closed]

I'm currently building my own Home Automation System with a bunch of Arduinos and Relais, all of them wired to Ethernet "Shields". The casing I am printing on a 3D printer. The Arduinos work great ...
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2answers
2k views

High Precision Temperature Sensor LMT70 connection to arduino mega

How can I connect an LMT70 temperature sensor (4Pins) to Arduino Mega board for atmospheric temperature measurement. LM35 sensor has got only 3 pins and connections are known. But LMT70 high precision ...
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0answers
854 views

LM35 gets very hot

I tried to connect a LM35 according the 'instructables' http://www.instructables.com/id/Arduino-Temperature-Sensor-Interfacing-LM35-THE-EA/step2/Setting-up-the-Arduino-with-temperature-sensor/ I ...