NodeMCU is an open source Lua based firmware for the ESP8266 WiFi SOC from Espressif and uses an on-module flash-based SPIFFS file system. NodeMCU is implemented in C and is layered on the Espressif NON-OS SDK.

How do I use NodeMCU Lua?

1. Bill of materials.
2. Create a firmware.
3. Flash firmware to NodeMCU.
4. Test the REPL.
5. Connect to WiFi.
6. Connect and test the BME280 sensor.
7. Upload init.lua.
8. Upload sensor readings to MQTT.

What is meant by NodeMCU?

The NodeMCU (Node MicroController Unit) is an open source software and hardware development environment that is built around a very inexpensive System-on-a-Chip (SoC) called the ESP8266. … And, you have to program it in low-level machine instructions that can be interpreted by the chip hardware.

What is Lua based firmware?

Overview. NodeMCU is an open source firmware for which open source prototyping board designs are available. … The firmware uses the Lua scripting language. The firmware is based on the eLua project, and built on the Espressif Non-OS SDK for ESP8266.

Why is NodeMCU used?

NodeMCU is an open source platform based on ESP8266 which can connect objects and let data transfer using the Wi-Fi protocol. In addition, by providing some of the most important features of microcontrollers such as GPIO, PWM, ADC, and etc, it can solve many of the project’s needs alone.

How do I program NodeMCU ESP8266?

1. Step 1: Connect Your NodeMCU to the Computer. …
2. Step 2: Install the COM/Serial Port Driver. …
3. Step 3: ​Install the Arduino IDE 1.6.4 or Greater. …
4. Step 4: ​Install the ESP8266 Board Package. …
5. Step 5: Setup ESP8266 Support. …
6. 1 Person Made This Project! …
7. 8 Comments.

Is NodeMCU better than Arduino?

In common the NODEMCU is based on the ESP8266 microprocessor have a very low current consumption between 15 µA and 400 mA which can be further decreased with the deep sleep mode activated to 0.5 µA. The current consumption is then a factor 70000 higher in deep sleep mode for the Arduino Uno with 35 mA.

What is NodeMCU WiFi module?

NodeMCU is an open source development board and firmware based in the widely used ESP8266 -12E WiFi module. It allows you to program the ESP8266 WiFi module with the simple and powerful LUA programming language or Arduino IDE. … It combines features of WIFI accesspoint and station + microcontroller.

How do you use ESPlorer?

1. Press the Refresh button.
2. Select the COM port for your FTDI programmer.
3. Select your baudrate.
4. Click Open.

What is NodeMCU V3 ESP8266?

The NodeMCU V3 is a breadboard-friendly open-source ESP8266 development kit, armed with the CH340G USB-TTL Serial chip. The CH340 line of chips is notoriously known as the affordable alternative to the CP210x. Whilst cheaper, CH340 is super reliable even in industrial applications.

Article first time published on

Why NodeMCU is widely used in IoT projects?

NodeMCU is an open source and LUA programming language based firmware developed for ESP8266 wifi chip. … ESP8266 has very low cost and high features which makes it an ideal module for Internet Of Things (IoT). It can be used in any application that require it to connect a device to local network or internet.

How many pins are there in NodeMCU?

GPIO Pins. ESP8266 NodeMCU has 17 GPIO pins which can be assigned to various functions such as I2C, I2S, UART, PWM, IR Remote Control, LED Light and Button programmatically. Each digital enabled GPIO can be configured to internal pull-up or pull-down, or set to high impedance.

Can NodeMCU replace Arduino?

Well, the answer of the question “Can it replace Arduino” – yes, in many cases it can.

What is the WiFi frequency of ESP8266?

The module has a wireless WiFi transceiver operating in an unlicensed frequency range of 2400-2484 MHz in the IEEE 802.11 b/g/n standard, with support for TCP/IP communication protocol stack and WiFi security including WAP3.

How do I connect my NodeMCU to WIFI?

1. Step 1: Download the Arduino IDE and ESP8266 NodeMCU Driver. …
2. Step 2: Configure ESP8266 NodeMCU As an Arduino. …
3. Step 3: Run Blinking LED Program. …
4. Step 4: Connect to a WIFI Network. …
5. Step 5: See Next Instructable. …
6. 8 People Made This Project!
7. 13 Comments.

What is NodeMCU Arduino?

NodeMCU is an open source IoT platform. It includes firmware which runs on the ESP8266 Wi-Fi SoC from Espressif Systems, and hardware which is based on the ESP-12 module. The term “NodeMCU” by default refers to the firmware rather than the development kits. The firmware uses the Lua scripting language. Wikipedia.

Does NodeMCU have WiFi?

NodeMCU can run in one of four WiFi modes: Station mode, where the NodeMCU device joins an existing network. Access point (AP) mode, where it creates its own network that others can join.

Which NodeMCU is best?

ESP-01ESP-12E NodeMCUFlash Memory1MB (upgraded version)4MBBreadboard-friendlyX✓USB to Serial ConverterX✓Size24.75mm x 14.5mm (0.97” x 0.57”)48.55mm x 25.6mm (1.91” x 1”)

What can ESP8266 do?

The ESP8266 WiFi Module is a self contained SOC with integrated TCP/IP protocol stack that can give any microcontroller access to your WiFi network. The ESP8266 is capable of either hosting an application or offloading all WiFi networking functions from another application processor.

What can you do with NodeMCU ESP8266?

• Smallest IoT Home Automation using ESP8266 – 01 with Videos (Hindi & English) …
• Geolocation using ESP8266. …
• ESP8266 Projects: Wireless Web Server. …
• World’s smallest IoT project. …
• Pressure Sensors on Railway Tracks. …
• Air Pollution Meter. …
• Humidity and temperature monitoring.

How does the ESP8266 work?

The ESP8266 module enables microcontrollers to connect to 2.4 GHz Wi-Fi, using IEEE 802.11 bgn. It can be used with ESP-AT firmware to provide Wi-Fi connectivity to external host MCUs, or it can be used as a self-sufficient MCU by running an RTOS-based SDK.

What is the purpose of WiFi module?

WiFi module, also known as serial to WIFI module, which belongs to the transmission layer of IoT. The function is to convert serial port or TTL level into embedded module which can conforming to WiFi wireless network communication standard, with built-in wireless network protocol IEEE802.

What is the difference between NodeMCU and esp8266?

Some development boards use basic esp8266 modules and some integrate the chip, flash memory and the antenna on the PCB. NodeMcu is a development board with esp8266 and a firmware with the same name. On the picture is a NodeMcu development board with an esp-12F esp8266 module soldered to the PCB of the NodeMcu.

What is the difference between NodeMCU V2 and V3?

Turns out that V3 is a “version” invented by producer LoLin to signify minor improvements to the V2 boards. Among others they claim their USB port to be more robust. If you compare the pin layout there’s only a tiny difference to the V2 layout.

Is ESP8266 a microcontroller?

The ESP8266 is a low-cost Wi-Fi microchip, with built-in TCP/IP networking software, and microcontroller capability, produced by Espressif Systems in Shanghai, China. … This small module allows microcontrollers to connect to a Wi-Fi network and make simple TCP/IP connections using Hayes-style commands.

How many types of NodeMCU are there?

There have been just two types of NodeMCU boards, however: versions 0.9 and 1.0. The 0.9 version is blue and comes loaded with the ESP-12 chip, while the 1.0 is black, and comes with the ESP-12E (which stands for ‘enhanced’).

What is the working voltage of NodeMCU?

Official NodeMCULoLin NodeMCUOperating Voltage3.3V3.3VInput Voltage4.5V-10V4.5V-10VFlash Memory/SRAM4 MB / 64 KB4 MB / 64 KBDigital I/O Pins1111

What is purpose of RX and TX pins in NodeMCU?

ESP8266 Internal GPIO Pin number 2 pins out of 11 are generally reserved for RX and TX in order to communicate with a host PC from which compiled object code is downloaded. Hence finally, this leaves just 9 general-purpose I/O pins i.e. D0 to D8. As shown in the above figure of NodeMCU Dev Kit.

What is NodeMCU flash button?

The Flash button on NodeMCU is connected between io 0 and ground. You can use it as a button. Set pinMode(0, INPUT_PULLUP) and you will read io 0 LOW if the button is pressed. NodeMCU schema.

How much current does NodeMCU draw?

BoardESP8266 NodeMCU V2ESP8266 NodeMCU V3Maximum Output Current1A1AMaximum Voltage Dropout1.1V @ 800mA1.1V @ 800mATypical Quiescent Current5mA5mAPower Consumption @ 5V

What is the difference between Arduino and Raspberry Pi?

The main difference between them is: Arduino is microcontroller board, while Raspberry Pi is a microprocessor based mini computer (SBC). The Microcontroller on the Arduino board contains the CPU, RAM and ROM. All the additional hardware on Arduino Board is for power supply, programming and IO Connectivity.