Arduino IDE serial monitor show’s fail to read from dht sensor.
DHT11 sensor is connected to Digital Pin 2. There is a 10k resister between data and vcc of this sensor.
There is a per second blink in node mcu onboard led, Tried adding D4 button for node mcu led blinking, its working. I can see the response.
This sensor is working with arduino uno using analog pin. But don’t know why this isn’t working with node mcu. Most of the people are using 3 pin dht11 sensor. Is that a problem?
My guess is you are wired up to the wrong pins. On ESP’s that have screen printing on the PCB, D2 doesn’t mean digital pin 2 like it does on an Arduino.
The D references on ESP’s are totally different to the pinout on an Arduino. Look up the pinout for your device,
Although you may be better off changing your code to pin 4 and leaving your wire connected to D2. I believe GPIO2 is a special one that needs to be at a certain state at boot or else it will boot in a different mode.
@Toro_Blanco Thank you so much I changed code to pin 4 and now it’s working So happy doing this, really appreciate your help and detailed information about pins. D2 is GPIO4!
@Costas you were right my wiring was not correct. The default dht11 Blynk sample code was expecting to connect data pin of sensor to D4(gpio2). Thank You!
So happy doing this, really appreciate your help and detailed information about pins. D2 is GPIO4!
