Esp8266 DHT11 Humidity & Temperature but Failed to read from DHT sensor

Question

Help please I'm trying to get the sensor values from DHT11 Humidity & Temperature Sensor but the Esp8266 is connecting to internet but is not reading the value from the sensor.

I'm using Blynk to display the sensor value

this is what appears in my monitors Serial

21:41:24.811 -> �����������������������������������������������������������������������������������������������[24759] Connected to WiFi
21:41:26.726 -> [24759] IP: 192.168.1.9
21:41:26.760 -> [24759] 
21:41:26.760 -> ___ __ __
21:41:26.796 -> / _ )/ /_ _____ / /__
21:41:26.796 -> / _ / / // / _ \/ '_/
21:41:26.832 -> /____/_/\_, /_//_/_/\_\
21:41:26.865 -> /___/ v0.5.4 on NodeMCU
21:41:26.903 -> 
21:41:26.903 -> [24837] Connecting to blynk-cloud.com:80
21:41:30.876 -> [28951] Ready (ping: 23ms).
21:41:34.230 -> Failed to read from DHT sensor!
21:41:34.940 -> Failed to read from DHT sensor!
21:42:56.217 -> Failed to read from DHT sensor!

my code

my current circuit diagram

You have to show your code otherwise it's impossible to help you just by reading your serial output — thepirat000, Jan 09 '19 at 03:11
this is my code https://github.com/unmalnickname/esp8266_Blynk_DHT11/blob/master/sketch_dec30b.ino — Luis Avila, Jan 09 '19 at 03:14
You should put a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor — thepirat000, Jan 09 '19 at 04:13
Your diagram shows it's connected to D4, but in your code it's D2. — gre_gor, Jan 09 '19 at 10:52

score 0 · Answer 1 · answered Jan 13 '19 at 13:00

0

Double check the connection of sensor and its variable define in code, it has to be the same, most projects with esp use D4 for dht input.
Try to put 4k7 to 10k resistor between +VCC and dht's data out pin.

answered Jan 13 '19 at 13:00

KiLLA

1

Esp8266 DHT11 Humidity & Temperature but Failed to read from DHT sensor

1 Answers1