Overview of Magnetometer HMC5883L is a 3-axis magnetometer which is used for measuring the direction and magnitude of the Earth’s...

Introduction MQTT is a lightweight publish-subscribe-based messaging protocol. It is quicker (faster) than other request-response based...

Introduction The Hypertext Transfer Protocol (HTTP) is a standard application layer protocol that functions as a request-response...

Introduction HTTP (Hypertext Transfer Protocol) is a standard Application protocol that functions as a request-response protocol between...

Overview of Bluetooth HC-05 is a Bluetooth device used for wireless communication with Bluetooth-enabled devices (like smartphones). It...

Description Recently, we are working on one project with NodeMCU and just wanted to change the SSID of the Wi-Fi access point. As usual,...

Introduction to I2C I2C (Inter-Integrated Circuit) is a serial bus interface connection protocol. It is also called as TWI (two-wire...

Introduction The Serial Peripheral Interface (SPI) is a bus interface connection protocol originally started by Motorola Corp. SPI...

Description While Wi-Fi connection the router assigns the random IP address to the NodeMCU Board. This is because DHCP (Dynamic Host...

Introduction An interrupt is an event that occurs randomly in the flow of continuity. It is just like a call you have when you are busy...

Introduction to PWM Pulse Width Modulation (PWM) is a technique by which the width of a pulse is varied while keeping the frequency of...

Introduction NodeMCU Development Kit/Board consists of an ESP8266 wifi chip. ESP8266 chip has GPIO pins, serial communication protocol,...

Introduction Analog to Digital Converter (ADC) is used to convert the analog signal into digital form. ESP8266 has an inbuilt 10-bit ADC...

Introduction to GPIO General-purpose input/output (GPIO) is a pin on an IC (Integrated Circuit). It can be either an input pin or output...

Introduction The ESP8266 is a low-cost Wi-Fi chip developed by Espressif Systems with TCP/IP protocol. For more information about...

Introduction NodeMCU is an open-source LUA based firmware developed for the ESP8266 wifi chip. By exploring functionality with the...

Introduction NodeMCU is Lua based firmware of ESP8266. Generally, ESPlorer IDE is referred for writing Lua scripts for NodeMCU. It...