A component which measures heat.
-5
votes
0answers
40 views
Scroll only one line & another line is fixed [on hold]
I want to make humidity and temperature measurement display on lcd(16x2) where 1st row is fixed(showing Humidity) and 2nd row is scrolling(showing Temperature). Please send me the arduino code.
...
0
votes
0answers
34 views
I have a sensor but it doesn't respond
For those who think: TL;DR long story short:
I want to measure the voltage output at certain temperature using arduino but do not get a signal.
Not sure if it belongs here, but you folks know a lot ...
1
vote
1answer
35 views
Trouble reading LM35 with long (?) Ethernet connection
I have a quick question to ask.
I have an Arduino Uno reading 4 temperature sensors (LM35) in 4 different rooms. What happens is that the two nearest rooms give stable values, while the two further ...
2
votes
1answer
34 views
DHT22 and SI114X.h com
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've the following setup:
Seeeduino CLOUD (Arduino YUN clone)
...
1
vote
3answers
72 views
Why do my temperature sensor values become inconsistent when additional hardware is added to the board?
I have this strange problem. My TMP 36 sensor works fine when it is the only thing connected to my Arduino Uno board. The voltage measurements, and thus the temperature, are accurate and consistent. ...
0
votes
1answer
24 views
Sensirion library for SHT7x humidity sensor
Guten Tag an alle! I have following code (and it works great!) for SHT75 Sensirion sensor.
/*
* Example code for SHT1x or SHT7x sensors demonstrating blocking calls
* for temperature and humidity ...
0
votes
2answers
43 views
How to handle low temperatures using Arduino Uno?
I want to create a simple electronic temperature sensor using the Arduino Uno.
The environments I want it to handle is inside a fridge and near a heater.
Although I am sure the Arduino can easily ...
1
vote
2answers
44 views
Best practices for really long distance sensor deployments
I'm noob to Arduino and electronics, but here is a problem from life which I need to solve for myself:
We grow strawberries and early spring freezes can take most of the flowers from the plants. One ...
3
votes
2answers
34 views
Running sensor input for given time, stopping, then running seperate scheduled relay output
I've set up an Arduino Uno to run a pretty basic garden watering schedule, with the delay function.
I've now built a solar thermal water heater with a pump and tried running it separately through a ...
0
votes
1answer
104 views
Problem with DHT11 and DS18B20 temperature sensors
I am trying to connect to my Arduino Uno board two temperature sensors: DHT11 and DS18B20.
The problem is with the DHT11 sensor, apparently there's an error with reading the temperature at every two ...
0
votes
2answers
52 views
Thermometer project shows fluctuation due to varying sensor value and voltage
I built this thermometer that reads the sensor value from the temperature sensor and displays it on the LCD display. It basically works fine, but the displayed temperature shows a fluctuation between +...
0
votes
0answers
17 views
How do I broadcast my signal from my Sodaq Mbili to another sensor
am sorry for my maybe unclear explanation but here we go. I have a Sodaq Mbili and a KY-028 Temperature Sensor. It's hooked up and connected to my pc. I want to use the antenna of my Mbili (board?) ...
0
votes
0answers
35 views
TX89 Engine Coolant Temperature Sensor (used in some GM cars)
How to interface it and measure temperature with Arduino? I think it is thermal resistor, but I do not know its range of resistance and how to calculate temperature from resistance (I guess it is not ...
0
votes
1answer
111 views
Second I2C address not accepted
I have set up 2 DHT22 sensors and 2 BMP280 sensors with an Arduino Uno SMD R3 board. The DHTs are working fine and are outputting correct temperature and humidity values to the Serial monitor. The ...
0
votes
0answers
8 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 ...
0
votes
1answer
537 views
BMP280 returns 0
I have connected a BMP280 temperature/pressure sensor to an Arduino Uno just like here:
and used the example code provided by the Adafruit BMP280 library. However, the values for temperature and ...
1
vote
1answer
147 views
Detection of DS18B20, arduino Mega
I just bought a DS18B20 temperature sensor. I can't detect the device when i run this code :
#include <OneWire.h>
#include <DallasTemperature.h>
// Data wire is plugged into pin 10 on ...
1
vote
2answers
137 views
How is it possible that my skin temperature is so constant?
Here's the code
#include <OneWire.h>
int DS18S20_Pin = 3; //DS18S20 Signal pin on digital 3
unsigned long startTime = 0;
#define MEASURE_PERIOD 250
//Temperature chip i/o
OneWire ds(...
0
votes
0answers
46 views
Why does this code make 4 Hz readings and the other is slower?
I want to make 4 Hz readings of the temperature. I don't understand why the second code is slower.
First code (what I think works)
#include <OneWire.h>
int DS18S20_Pin = 3; //DS18S20 Signal ...
0
votes
1answer
230 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
4answers
82 views
Is it possible to make 4hz readings with the DS18S20 temperature sensor?
My current code that doesn't convince me:
#include <OneWire.h>
int DS18S20_Pin = 3; //DS18S20 Signal pin on digital 3
unsigned long startTime = 0;
#define MEASURE_PERIOD 250
//Temperature ...
0
votes
2answers
46 views
What is the best way to attach TMP36 sensor to the copper coil?
I am very new to this site and this question may not be strictly related to Arduino, but I do small Arduino project which needs to measure the temperature of the copper coil using TMP36GZ sensor.
...
1
vote
0answers
38 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:
...
3
votes
1answer
97 views
LM335Z temperature sensor gives very varying values
I'm trying to get consistent values from the LM335Z temperature sensor. But it behaves very strange.
I'm using an arduino nano and it's powered via USB from a Raspberry Pi. The circuit also has two ...
2
votes
3answers
143 views
Problems coding a 12 pin 7 segment display and grove temperature sensor with Arduino Uno
I am trying to code my 12 pin seven segment display to display the temperature from my grove temperature sensor. I am new to this and I have been struggling, so if anyone could help that would be much ...
0
votes
1answer
156 views
DS18B20 Temperature Sensor return as float function returning null 50% of the time
I just got an DS18B20 Temperature sensor and am trying to modify the example code to use a function instead. Below is my getTemp function. It's working but returning results with a 0 value part of the ...
0
votes
2answers
168 views
DHT11 and Pulse sensor incompatibility?
I am working on an IoT project to send data acquired from DHT11 and PulseSensor to a website. I can send the data properly when I use each of sensors alone but when I write a wrapper to use both ...
0
votes
2answers
182 views
What is this temperature sensor module? (LM358, 103)
I got this sensor some time ago because I wanted to play with measuring the temperature. I don't remember how I got it or if it has a name.
I've Googled around, and obviously is has the following
...
0
votes
1answer
59 views
Arduino code not working
Basically its an arduino project in which i am using an analog temperature sensor ky 013. The sensor is reading the temperatures correctly but what i want is to print the temperatures showed on the ...
0
votes
1answer
55 views
What could I use to vary the temperature of a Heating Pad?
Could I get something like this, a 12v silicone heating pad, and vary its temperature with an arduino somehow?
http://www.banggood.com/Waterproof-Silicone-Flexible-Heating-Pad-6060MM-DC-12V-10W-p-...
0
votes
1answer
430 views
ESP8266 cannot read DHT22
I am trying to build a WiFi humidity and temperature sensor. My board is a nodeMCU using the ESP8266 connected via USB. The board is working fine with various WiFi examples and various serial examples....
2
votes
2answers
80 views
Sensor for very low temperature (liquid nitrogen)
I'm looking for a way to measure temperatures in range of 40 to -200 °C (100 to −320 °F). The usual solution DS18B20 works only down to -55 °C (-67 °F).
Any ideas?
p.s.
Precision of 2 °C would be ...
1
vote
1answer
66 views
Reading sensor data over MUX
I will start by saying I am very new to using Arduino. The project I am planning is to create several arrays of sensors (each array will consist of 4 DS18B20 sensors and one temperature/humidity ...
0
votes
1answer
52 views
Arduino TMP36 sensor
I am following the tutorial Tiny WiFi Temperature Sensor with Arduino. everthing works fine, but I have a little problem.
When the serial monitor is opened the sensor is reading fine like 23.20, 20....
1
vote
1answer
47 views
Plug/socket between thermocouple wires and the amplifier
I am building a temperature monitoring system that has 24 thermocouples. Managing all the wires is a hassle, and I'd like to connect all 48 wires to a few plug and socket connectors. Maybe 6 of these ...
0
votes
1answer
552 views
RobotLinking 18B20 pinout and circuit board weirdness
I have a Dallas Semiconductors 18B20 temperature sensor on a RobotLinking board. It's part of the RobotLinking 37 Sensors Kit. The board has a LED to indicate activity. It resembles this:
Here's ...
1
vote
1answer
2k views
How to read temperature from multiple DS18B20 faster?
I am writing an Arduino sketch to read temp data from multiple DS18B20 sensors and then write it to serial. The problem is, as I am connecting more sensors, the delay between my temp data is written ...
4
votes
2answers
761 views
“No more addresses” when using multiple DS18B20 sensors
I want to build a scheme to get data from several DS18B20 sensors and write their temperature to serial. Before I connected them using parasite mode and using 2,7k resistor (because I didn't have 4,7k ...
2
votes
2answers
98 views
DHT11 and DHT22 unused pin
The DHT11 and DHT22 is a 4 pin temperature and humidity sensor, where one of the pins is labelled as NC (not connected).
I'm curious what the unused pin is used for.
Factory calibration?
1
vote
1answer
93 views
LM35 and Character LCD
I have an arduino pro mini and I have attached a 16x2 character LCD and an LM35 analog temperature sensor. When I upload a sketch using only the sensor and send the readings to serial monitor, the ...
1
vote
2answers
2k views
Using ATtiny85, NRF24L01+, DHT2: can't get data from DHT22
I am trying to make a sensor that gets temperature and humidity values from a DHT22 and send it through NRF24L01+ to a Raspberry Pi 2 Model B.
To connect NRF24L01+ to ATtiny85 and to free two pins ...
1
vote
1answer
84 views
Can't read from DHT sensor when motor is running
I've been following this tutorial and I've run into some weird problems. When my motor starts running, I get "Failed to read from DHT sensor" on my serial window, meaning that readHumidity() and ...
0
votes
1answer
52 views
arduino PWM temperature inexpected results
I am making a system which regulates the temperature of a plate.
using the PID library
I programed the system as followed:
/********************************************************
* PID Basic ...
3
votes
1answer
155 views
Why is my TMP35 giving me weird values?
A TMP35/36/37 is giving very high voltage readings, which results in high temperature readings. The serial monitor looks like this:
As you can see, the sensor value is in the 900s, voltage is almost ...
0
votes
1answer
604 views
Arduino + TMP36 + DC Motor
I made this circuit:
The part with the DC motor is from this tutorial: https://learn.sparkfun.com/tutorials/sik-experiment-guide-for-arduino---v32/experiment-12-driving-a-motor ( I only use ...
0
votes
3answers
103 views
TMP36 probe reading 0 on analog
I've designed this system which is supposed to turn on the LEDs when the temperature of a particular probe exceeds 32 degrees. From what I can tell, this should be functional but the analog sensor is ...
0
votes
1answer
40 views
LM35 at higher temperatures
I have a question concerning the LM35 sensor: if I'm not too concerned about accuracy (I don't mind having 2 or more degrees off), is it possible to use the LM35 sensor at higher temperatures than the ...
1
vote
4answers
190 views
Suggest some highly sensitive temperature sensor
Currently I am using DHT11 in my project, but its not very sensitive, it is quite slow in detecting temperature changes.
What sensor could I use that will be more sensitive?
0
votes
3answers
493 views
How can BMP180 measure a temperature too?
I got the following device
(sorry for imperfect focus)
and found, that it can measure not only pressure, but also a temperature too. The code was taken from common sketches for Adafruit BMP085 and ...
2
votes
2answers
984 views
Reducing read time for reading DS18B20 temp sensors
I have a number of temperature sensors connected up to an Arduino - I've split it into 3 sections, with each section having a 2-4 sensors on it (due to distances). This works, but the code I'm using ...
