DHT11 Temperature and Humidity Monitor with NodeMCU on ThingSpeak

This tutorial is all about DHT11 Temperature and Humidity Monitor with NodeMCU on the ThingSpeak server. It clarifies how we can use the ThingSpeak cloud service provider to log DHT11 Temperature and Humidity data using NodeMCU.

 

Here I am using Arduino IDE to program NodeMCU ESP8266. Actually, you will learn to configure NodeMCU ESP8266 board to monitor DHT11 sensor temperature and humidity values.

 

Also check these previous articles:

 

- Interfacing DHT11 Humidity & Temperature Sensor with Arduino & LCD

- IoT Weather Station using DHT11 Sensor

- NodeMCU ESP8266 Monitoring DHT11/DHT22 Temperature and Humidity with Local Web Server

 

Components Required

 

You just need a NodeMCU ESP-12E Wi-Fi Development board and a humidity sensor DHT11 or DHT22. Besides this, it requires a breadboard and connecting wires.

 

DHT11 Temperature & Humidity Sensor:

 

The DHT11 is a primary, ultra-low-cost digital temperature, and humidity sensor. To measure the surrounding air DHT11 uses a capacitive humidity sensor and a thermistor. And then spits out a digital signal on the data pin (no analog input pins needed).

 

It’s quite simple to use but requires precise timing to capture data. The entire real drawback of this sensor is you can only get new data from it once every 2 seconds. So when using the DHT library, sensor readings are up to 2 seconds old.

 

Circuit Diagram & Connection:

 

The wiring of DHT11 sensor with NodeMCU is very simple.

 

theiotprojects.com/dht11-temperature-and-humidity-monitor...

Done