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