Apr 16, 2016 · I am using DHT11 sensor in my arduino uno . the data format sent by the sensor is the following : 8bit integral RH data + 8bit decimal RH data + 8bit integral T data + 8bit decimal T data + 8bit check sum. the code I used is :

Oct 1, 2020 · From DHT11 datasheet, it only supports resolution to 1 degree Celsius and 8bits for humidity leading to the integer like floats. Also something to keep in mind is the units that the DHT11 and DHT22 output. Temperature is returned as Celsius and humidity is a value between 0 - 100 representing the relative humidity.

Sep 7, 2017 · #include "DHT11.h" ^ ... Indicates that the specified .h file is not found. Perhaps you need to install a DHT11 Arduino driver package. With driver package properly installed, perhaps the line should instead be: #include <dht11.h>

I am new to working with Raspberry Pi physical computing. I have a Raspberry Pi and am trying to write a simple Python program to print the temperature and humidity data to the log. I have a DHT11 sensor plugged into 3V3, ground, and the data connected to GPIO pin 14. Here is the code I have so far:

Nov 29, 2016 · The first time I used the DHT11 everything went fine. I tried the DHT11 for another application and I had that problem, the nan on my LCD1602 and on the serial monitor. I thought it was the DHT11 which was defective, so I reloaded my old program to test the DHT11. The program worked fine with the new DHT11, so it wasn't the DHT11.

Oct 30, 2021 · You will need to use the TryReadHumidity and the TryReadTemperature method of the Dht11 class. This methods return a bool where you can validate the successful read of the sensor. But you will also receive a RelativeHumidity struct and a Temperature struct as a out parameter of the methods. Example:

Apr 1, 2024 · I have edited down an example from Adafruit for the DHT11 sensor, and have it working on an Arduino UNO. You could try this simple code with your setup to help narrow down what is going wrong. I have found that if I set the sensor to DH22 in the code rather than DHT11, it returns NAN - so it is possible that you have got the wrong sensor.

Although it depends on the exact model, the output power pins on most ESP8266s are 3.3V. Most sensors (including the DHT11) prefer an input closer to 5V. (It claims it can take 3.5V - 5.5V) This has clowned me in the past and I have a sneaking suspicion that this is what you're running into.

May 31, 2018 · How do I get correct humidity readings from a DHT11 sensor, or do I just need better quality gear? The temp looks correct, humidity is not. Remotely accurate humidity readings are needed for my project. UPDATE: Tried the 3rd and all 3 are identical in behavior. Same 40 point deficiency. UPDATE #2:

Apr 9, 2024 · This happened to me as well using a DHT11 (blue) but with a NodeMCU, not a Pi Pico. Oddly enough defining the sensor as a DHT22 first, measuring, then redefining as DHT11 got it to work. import dht import machine d = dht.DHT11(machine.Pin(2)) d.measure() >>> Traceback (most recent call last): >>> File "<stdin>", line 1, in <module> >>> File ...