Hello,
I'm currently using the temperature and humidity sensor that came with the Arduino sensor kit, but I've been running into a few issues with it. Each time I run the program, it only returns "nan" for both temperature and humidity values. I was wondering if there's something I'm forgetting to add, or if there's just a general issue that I'm not seeing. Any feedback will help.
Below is the code that I'm using. Thanks in advance for your help!
Care to be more specific. Most of us have no idea what that kit is or contains.
@oddnanolo Installation and Troubleshooting is for Problems with the Arduino itself NOT your project. It says so in the description of the section. Therefore I have moved your post here. Please be more careful where you post in future.
You may want to read this before you proceed:-
how to get the best out of this forum
It helps to know where this message is being generated from, the compiler or when it runs.
It's a DHT11 temperature and humidity sensor, and it's part of the sensor kit sold by Arduino. Here's a link entailing what it is.
Hello oddnanolo
Take a view and get some ideas.
https://create.arduino.cc/projecthub/arcaegecengiz/using-dht11-b0f365
Have a nice day and enjoy coding in C++.
Hello,
Thanks for the tutorial. I followed the directions as followed, however I keep getting "0.00" values for both the temperature and humidity. Do you know what might cause this?
It might be a defect and/or fake sensor?
@oddnanolo
Are you using the following Temp + Humidity Sensor?
Edit:
I initially thought this too, but I tried a different kit and I got the same error messages.
Which sensor are you referring to?
Hello oddnanolo
Did you ckeck the correct connection and value of the resistor?
About the following DHT11 Temp + Hum Sensor:
That's the type of sensor that I'm using. In this case, the sensor is directly wired to the sensor kit base.
I think it unlikely to be a hardware problem. I found this code on the @paulpaulson "using DHT11" link.
Do you perhaps need to declare to which pin the DHT is attached?
#include <dht11.h>
#define DHT11PIN 4
dht11 DHT11;
void setup()
{
Serial.begin(9600);
}
void loop()
{
Serial.println();
int chk = DHT11.read(DHT11PIN);
Serial.print("Humidity (%): ");
Serial.println((float)DHT11.humidity, 2);
Serial.print("Temperature (C): ");
Serial.println((float)DHT11.temperature, 2);
delay(2000);
}
You have a four wire sensor that wants to plug into an I2C port and not the D7/D8 port you have it plugged into. The open leads are reading 00 or NAN (Not A Number) - noise.
Hello,
I had declared the pin to the one that the DHT sensor was attached to, but still no luck, unfortunately.
What do you suggest? Should I try plugging the sensor into an I2C port instead?
Yep. Move it one connector to the right. I can see the SDA and SCL markings on your DHT.
Thanks for the feedback. I was going to run the same code as the one @johnerrington had posted in this thread, however I don't know what pin to assign for "DHT11PIN" in the 2nd line. Do you have any suggestions on that?