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Questions tagged [temperature-sensor]

A component which measures heat.

7
votes
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 ...
-1
votes
2answers
179 views

SocketIO Arduino TCP Port ISSUE

Initially I was sending sensor data to NodeJS using socketIO and this worked perfectly. I had to add a function to control an RGB LED using this. This also works but I'm unable to perform these two ...
2
votes
1answer
214 views

Combine DHT22 and SI114X.h

It looks like I cannot combine the Grove sunlight sensor and the Grove DHT22 temperature and humidity sensor. I can't figure out why. I have the following setup: Seeeduino Cloud (Arduino Yún clone) ...
1
vote
1answer
65 views

Arduino based fully controlled aquaculture

I am doing a project on aquaculture,so I am using temperature sensor, water level sensor, dissolved oxygen sensor, pH sensor and also 4 motor's and water heater is it possible for a single Arduino to ...
1
vote
1answer
815 views

Arduino MKR1000 and DHT11 not giving correct output for temperature and humidity

I've been trying to follow this tutorial to wire my Arduino MKR1000 to a DHT11 temperature and humidity sensor, but my output consists of either 0's or 255's for both values. I've tried several ...
1
vote
1answer
1k views

MQ135 Air Quality Sensor Signal Amplifier needed? Higher Quality Sensor?

I am trying to strengthen the signal from my MQ135 air quality sensor so it can detect aerosols from 3 feet away, as, currently as it stands the resolution is pathetic, it only blips from 0.21 to 0.58 ...
1
vote
1answer
5k views

Read temperature (DS18B20) with the ATTiny85

I'm trying to read the temperature of a DS18B20 with my ATTiny85 - but I'm getting rubbish data :D I should have gotten ~22 degrees, but I'm getting 129! I followed this tutorial i found here, but ...
0
votes
1answer
16 views

Need help combining two sketches (HC05 and temperature)

I have a project where I have to combine 4 sensors and get data wireless via Bluetooth (HC05). I just want help with combining just 1 sensor sketch and the Bluetooth sketch. I want the data from the ...
0
votes
1answer
544 views

Using Modbus-RTU with Arduino and temperature controller

I'm trying to connect with a 4 channel temperature controller using Arduino Modbus Library. This is a part of my temperature controller datasheet. It has register for read PV of each channel. I have ...
0
votes
1answer
466 views

GPS module not working with sensor

I am connecting my Soil Moisture Temperature Sensor SHT10 with GSM Module SIM900A and GPS GY-GPS6MV2. Individually, all components work properly and give proper values. But when I interface all three ...
0
votes
1answer
233 views

Which thermometer for home brewing

Hello, I have an Arduino Yun and I brew beer. I would like to log the temperature of the beer at all time during the fermentation process (final stage). This means the thermometer would have to ...
-2
votes
1answer
34 views

Use 2 DHT22 AND PASS THE DATA TO SD Error File data does not exsist

anyone can help me please to fix this error when I try to compilate says File does not exsist. It would be great if anyone can post the entirely code. Link of code below if anyone can help me please: ...
2
votes
0answers
2k views

How to read temperature using arduino uno board with PT100 RTD sensor?

I am new to arduino programming. And almost inexperienced. I am looking to program my arduino Uno board to read 2/3/4 wire configuration of PT100 RTD sensor (in accuracy levels of atleast 0.5°C). The ...
1
vote
0answers
37 views

Converting Client input char to int

I'm trying to print out the temperature from a DS18B20 sensor to my app via a tpc connection. Because I have two sensors connected I will need to call the one needed by an Index. This index comes from ...
1
vote
0answers
82 views

Arduino Uno - temperature sensor DS18B20 not responding

I try to use a new DS18B20+ temperature sensor (sealed water proof version). It doesn't work. My own code doesn't work, examples from DallasTemperature Library don't work, example from OneWire ...
1
vote
0answers
163 views

Too high mistake percentage in reading data from MLX90615 Sensor & Arduino?

I have bought a MLX90615 IR Thermal sensor with my Arduino UNO. After consulting Google and Github data, I have code similar to this: #include "LiquidCrystal.h" unsigned char Re_buf[11],counter=0;...
1
vote
0answers
706 views

ESP8266 can't read parasitic DS18B20 temperature (reset during conversion, 85°C)

tl;dr at the end I was running two DS18B20+PAR temperature sensors without any problems for the last two years on an ESP-01 module running on 3.3V on GPIO 2 using a 4.7K pullup resistor. Now, ...
1
vote
0answers
179 views

Arduino Fails to Read Thermocouple on External Power

I'm having what I believe to be a power issue with an Arduino project. I've tried 3 different power supplies (all separately): My computer via USB B A 5V USB "outlet" via USB B A 5V USB "outlet", ...
1
vote
0answers
366 views

Arduino Uno R3 keeps on resetting within void setup() itself

This problem is very recent as I have run the program (standard SHT10 sensor code) successfully many times. But now, all of a sudden, my program keeps repeating void setup() statements and does not ...
1
vote
0answers
37 views

Voltage on open circuit jumping on Arduino R3

I am working with a bunch of sensors and everything is fine so far, but I figured on analog PINS 4 & 5 the output voltage read is 0.09V higher than on 0-3... for my Sensors this is a crucial issue....
1
vote
0answers
116 views

How can I read also the temperature with this GSR sensor?

Considering the GSR is the inverse of the Resistance, if I know the resistance and how much it increases for every celsius degree, the game would be done. Here's how my code looks like at the moment: ...
1
vote
0answers
227 views

cc3000 WiFi distrupting DS18b20 temp measurements

I am trying to post temperature measurements from DS18b20 thermal sensors to an online repository using a cc3000 WiFi shield on an Arduino Mega. It works great, once. All the temperatures get read ...
1
vote
0answers
217 views

Arduino based temperature sensing circuit

I've currently got a setup where I am using a 2 thermocouple setup using MAX31850 and the circuit looks exactly as mentioned here using the external power option. (https://learn.adafruit.com/adafruit-...
1
vote
0answers
1k views

Grove temperature sensor with Arduino Yun

I try to test Grove - Infrared Temperature Sensor on Arduino Yun with the sample code but it does not work. In the console it shows that the object temperature is out of range all the time. However, ...
0
votes
0answers
32 views

Arduino stuck when I disable Timer 2 Interrupt

#define TIM2_EN() (TIMSK2 = 0x02) #define TIM2_DIS() (TIMSK2 = 0x00) //HEART SENSOR // Include Libraries #include "Arduino.h" class PulseSensor { public: static void begin(int pulsePin); static ...
0
votes
0answers
37 views

What is the difference between the digital temperature sensors SHT31 and DHT11 or DHT12?

I am looking for a digital temperature sensor with I2C interface. I found the SHT31 and the DHT12 (compatible to DHT11). Both also include humidity sensors. And I found libraries for both of them. ...
0
votes
0answers
29 views

EEPROM.read data not comparing with DHT11 sensor value - Arduino temp controller

I'm using a DHT11 to read temperature to control a relay that will control a fan. When 'A' is pressed it allows the user to update the temp value that the relay will go HIGH at. The value is being ...
0
votes
0answers
37 views

Can I put a resistor in the ground connection of my DHT22 sensor?

I'm building a project that uses a couple of Adafruit DTH22 temp/humidity sensors. (https://www.adafruit.com/product/385) I have them wired into my project box through 3.5mm mini plugs (The kind that ...
0
votes
0answers
54 views

LCD (I2C) issues with pull up resistor

I'm close to finish my first DYI project. But a never seen issue on the breadboard has apprear as soon as assembled. The LCD is always / totally blank/black. When I remove the 4.7 K ohm pull-up ...
0
votes
0answers
420 views

PWM fans causing temp sensor erroneus values (interference?)

I am learning Arduino programming and my current project for real use is to connect 10-17 PC chassis PWM fans to be temperature controlled by the arduino. So, I have connected the fans exactly as in ...
0
votes
0answers
66 views

How to interface LCD?

I brought an ATmega328p chip today, which I bootloaded later on and I tried some basic circuit examples (like blink LED) with the chip (Minimizing the circuitry) and it worked perfectly fine. When I ...
0
votes
0answers
256 views

Ethercard SD and DHT11

I want to build a web page on an ATmega328 that will link me to an SD card file with the saved values of a DHT11 sensor. I manage to program the "Web Server" on the atmega328 and the code that creates ...
0
votes
0answers
130 views

Read the temperature of some temperature sensor in the neighbourhood

I got a new thermometer that supports an outdoor module. Despite the fact that I don't have such a module it displays an outside temperature of currently 2.6°C, which is more or less accurate for the ...
0
votes
0answers
542 views

Temperature Sensor not giving proper values

In my current project I am reading temperature through sensor which is having only two wires. To read sensor values, I have used below schematic which I have found on Arduino Project Hub site. In my ...
0
votes
0answers
862 views

Help with GET/POST request

Here is my code for my ESP8266 which I want to have send data to my google spreadsheet. With a script attached to the sheet it collects the data, sent via the URL and inputs it into the sheet. I had ...
0
votes
0answers
205 views

Program hangs at am2315.begin() - ideas?

In working with the AM2315 temperature/humidity sensor, my program hangs at the am2315.begin(); line. The only output I get is "Serial on" Here is the code: #include "cactus_io_AM2315.h" AM2315 ...
0
votes
0answers
33 views

Tmp36 spike and dip

I'm measuring two temperatures and powering both tmp36 sensors off of the 5v pin. For some reason pin A0 (t0) will periodically spike or dip 100°f over actual ambient and pin A1 (t1) will spike or ...
-1
votes
0answers
79 views

Spurious temp readings with DHT11

I have a very simple circuit and program to read the temperature and humidity from a DHT11 sensor and an Arduino Nano. When connected to the PC all works as expected but when I switch to a battery (...