DHT-sensor-library | Arduino library for DHT11 , DHT22 , etc Temperature
kandi X-RAY | DHT-sensor-library Summary
kandi X-RAY | DHT-sensor-library Summary
Arduino library for DHT11, DHT22, etc Temperature & Humidity Sensors
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QUESTION
Pictures of the wiring of the DHT11 to the ESP
When I try to read temperatures in Fahrenheit, Celsius and to get the Humidity, it always says 'nan' on the serial monitor. I'm working the Arduino IDE with the Generic ESP8266 Module and I got the libraries "DHT-Sensor-Library" and the "Adafruit-Unified-Sensor"-Library installed.
I know it stands for "Not a number", but why? I looked on here before and tried using (isnan) and store it in a backup-variable, but that didn't work either.
...ANSWER
Answered 2021-Apr-08 at 12:53It looks like you're trying to power the DHT11 directly from a GPIO pin.
GPIO pins are intended to send signals. When you use them for power, the results can be unpredictable.
Instead, try powering it from one of the "always-on" 3.3V pins.
If that doesn't work, try powering the DHT11 from an external power source (preferably 5V).
If that doesn't work, please post a picture of your circuit.
QUESTION
I found the only one Python library for the Digital-output relative humidity & temperature sensor/module DHT22: https://github.com/adafruit/DHT-sensor-library
But considering a function in /usr/local/lib/python3.7/dist-packages/Adafruit_DHT/platform_detect.py it's not supporting the latest Raspberry processor (BCM2711):
...ANSWER
Answered 2020-Jul-22 at 13:34I dared to change the above function and it works! But BE CAREFUL if you use outputs that are different for different board versions. I used GPIO4.
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