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Hey folks,  In this tutorial we will learn how to interface Servo motor with NodeMcu(ESP8266)module and operate it with the Blynk app.  Servos  are controlled by sending an electrical pulse of variable width, or pulse width modulation (PWM), through the control wire. There is a minimum pulse, a maximum pulse, and a repetition rate. A  servo motor  can usually only turn 90° in either direction for a total of 180° movement. servo Motor (Back view)  Servo Motor (front view) Blynk  is a Platform with iOS and Android  apps  to control Arduino, Raspberry Pi and the likes over the Internet. It's a digital dashboard where you can build a graphic interface for your project by simply dragging and dropping widgets. (Blynk App) Components Required: Servo motor NodeMcu(ESP8266) Connecting wires(male to male) Breadboard    Follow the image below for circuit connection reference. (Servo Motor connecting with NodeMcu) In this circuit, we have connect

In this tutorial, we will learn how to interface DC Motor with NodeMcu by using Relay Module controlling with Alexa echo. with voice API. A DC motor is any of a class of rotary electrical machines that converts direct current electrical energy into mechanical energy. The most common types rely on the forces produced by magnetic fields. SmallDC motors are used in tools, toys, and appliances. DC Motor (Overview)  There are 4 main types of DC motors: Permanent Magnet DC Motors. The permanent magnet motor uses a permanent magnet to create field flux. Series DC Motors. In a series DC motor, the field is wound with a few turns of a large wire carrying the full armature current. Shunt DC Motors. Compound DC Motors. So now we are familiar with the motor let us interface it. Components Required: DC motor NodeMcu(ESP8266) Alexa echo. Connecting wires(male to male) Breadboard Relay Module Follow the Image below for circuit connection reference:- (Interfacing all

Hey Folks, In this tutorial, we will learn, how to interface DHT 11 with Node Mcu(ESP8266 ).   The  DHT11  is a basic, ultra low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air and spits out a digital signal on the data pin (no analog input pins needed). DHT11 Back Side DHT11-Internal Sensor Components Required NodeMcu(ESP8266)  DHT 11 SENSOR  Few male to female connecting wires  Breadboard Follow the image below for circuit connection reference. DHT11 Sensor connection with NodeMCU(WiFi-Module) In this circuit, we have connected the output pin to the D3 pin of the NodeMcu module and NC pin remain disconnected. After making the circuit dump the code given below. // Karkhana Report // temperature and humidity data using thingspeak.com // Hardware: NodeMCU,DHT11 #include <DHT.h> // Including library for dht #include <ESP8266WiFi.h> String apiKey = "TH