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ESP8266 NodeMCU Basics: Datasheet, Pinout [FAQ]

Author: Mia
Date: 21 Jan 2022
 26470
esp8266 arduino

Most people call ESP8266 as a WIFI module, but it is actually a microcontroller. ESP8266 is the name of the microcontroller developed by Espressif Systems which is a company based out of shanghai. This microcontroller has the ability to perform WIFI related activities hence it is widely used as a WIFI module. 


Catalog

ESP8266 Pin Configuration and Functions

ESP8266 CAD Models

ESP8266 Functional Block Diagram

ESP8266 Features

ESP8266 Specifications

ESP8266 Applications

Other Development Boards

ESP8266 Package

How to Program NodeMCU ESP8266

ESP8266 Popularity by Region

ESP8266 Market Price Analysis

ESP8266 Manufacturer

Component Datasheet

FAQ


ESP8266 Pin Configuration and Functions

Nodemcu ESP8266 PinoutESP8266 NodeMCU pin functions:

NodeMCU ESP8266 Pin Functions

NodeMCU ESP8266 Pin Functions

NodeMCU ESP8266 Pin Functions

NodeMCU ESP8266 Pin Functions

NodeMCU ESP8266 Pin Functions


ESP8266 CAD Models

ESP8266 part symbol

ESP8266 footprint

ESP8266 3D Model


ESP8266 Functional Block Diagram

ESP8266 Functional Block Diagram

ESP8266 Functional Block Diagram


ESP8266 Features

  • 802.11 b/g/n support
  • 802.11 n support (2.4 GHz), up to 72.2 Mbps
  • Defragmentation
  • 2 x virtual Wi-Fi interface
  • Automatic beacon monitoring (hardware TSF)
  • Support Infrastructure BSS Station mode/SoftAP mode/Promiscuous mode

ESP8266 Specifications

ESP8266 Specifications


ESP8266 Applications

  • Home appliances
  • Home automation
  • Smart plugs and lights
  • Industrial wireless control
  • Baby monitors
  • IP cameras
  • Sensor networks
  • Wearable electronics
  • Wi-Fi location-aware devices
  • Security ID tags
  • Wi-Fi position system beacons

Other Development Boards

Arduino, Raspberry Pi, PIC Development Board, AVR Development Board, MSP430 Launchpad, Intel Edison, Beagle Bone


ESP8266 Package

ESP8266 Package


How to Program NodeMCU ESP8266

  • Requirements
  1. An ESP8266 module.
  2. Arduino UNO, UARTbee or any UART to the USB device.
  3. Jumper wires.
  4. Arduino IDE version 1.6.6 or higher.
  • Get Started

    First, we’ll need to identify the pinout of ESP8266.

Esp8266ESP8266-01

 

To set the ESP8266 in programming mode you need to connect its wires like this:

 

ESP8266 UARTbee Arduino UNO
RXD TXD RX
GPIO0 GND GND
GPIO2 ——- ——-
GND GND GND
VCC 3.3 3.3V
RST ——– ———–
CH_PD 3.3V 3.3V
TXD RXD TX

NOTE: If you are using an Arduino UNO you will need to set Arduino RST to GND. Please be careful with the VCC of the ESP8266, it works only with a 3.3V supply.

  • Setup the Arduino IDE

1. Download Arduino IDE.

2. Open your IDE and click on File -> Preferences".

3. In “Aditional Boards Manager URLs” add this line and click on “OK”:

http://arduino.esp8266.com/stable/package_esp8266com_index.json

4. Go to “Tools -> Board -> Boards Manager”, type “ESP8266” and install it.

5. Go again to “Tools -> Board” and select “Generic ESP8266 Module”.

  • Flash your code

Now you’re ready to use your ESP8266 as a stand-alone module without needing an external micro-controller. 


ESP8266 Popularity by Region

ESP8266 Popularity by Region


ESP8266 Market Price Analysis

ESP8266 Market Price Analysis


ESP8266 Manufacturer

Espressif Systems is a public multinational, fabless semiconductor company, headquartered in Shanghai and offices China, India, Brazil, Singapore and Czechia. As a complete-solution provider, we specialize in producing highly-integrated, low-power, Wi-Fi-and-Bluetooth SoCs. Among our most popular IoT solutions are the ESP8266 and ESP32 series of chips, modules and development boards.


Component Datasheet

NodeMCU ESP8266 Datasheet


FAQ

  • What is esp8266 used for?

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 is the differences between NodeMCU and esp8266?
ESP8266 is a microcontroller with WiFi capability. it requires external flash memory and some antenna to work.The NodeMcu firmware is a Lua language interpreter and has nothing to do with Arduino, but the NodeMcu development board can be used as any other esp8266 development board.
  • What is the range of  esp8266?

You may get 300m line-of-sight outdoors. External antennas will give more range if they're oriented in the 'best' direction (usually parallel to each other).

  • What is PWM IC?

The TL494 fixed frequency PWM Controller can be used for DC to DC conversion regardless of buck or boost topology. ... This IC feature an output control circuit, a flip flop, a dead time comparator, two different error amplifiers, a 5V reference voltage, an oscillator, and a PWM comparator.

  • What is better esp32 vs esp8266?

The ESP32 is much more powerful than the ESP8266, comes with more GPIOs with multiple functions, faster Wi-Fi, and also supports Bluetooth. Many people think that the ESP32 is more difficult to deal with than the ESP8266 because it is more complex.

  • How Can I increase my esp8266 range?

A simple way of extending range is to use a HomePlug wireless access point. This plugs into a mains socket where you need to extend your wireless network to. You need a second, normal HomePlug adaptor connected to your router via Ethernet.

  • Does esp8266 support Bluetooth?

As well as all the features of the ESP8266, it includes faster Wi-Fi, a CPU core, more GPIOs, and supports Bluetooth. It also features touch sensitive pins, a built-in hall effect sensor and a temperature sensor.

  • How does esp8266 WiFi module work?

The ESP8266 can be controlled from your local Wi-Fi network or from the internet (after port forwarding). The ESP-01 module has GPIO pins that can be programmed to turn an LED or a relay ON/OFF through the internet. The module can be programmed using an Arduino/USB-to-TTL converter through the serial pins (RX,TX).

  • How do I know if esp8266 is working?

Open the Serial Monitor window from the Arduino IDE and change the following settings at the bottom of the Serial Monitor window: Both NL & CR – send both a newline and carriage return character at the end of a command. 115200 baud – baud rate of communication set to 115200.

  • Why esp8266 is not connected to WiFi?

4 Answers. Maybe you have a space in your WIFI SSID so you should check this in your router. Also maybe your WIFI is on 5Ghz and the ESP can't see it because it is only for 2.4 Ghz. Also if your WIFI AP is on a channel from 13 - 14 it also couldn't be seen by the ESP.

  • How many sensors can be connected to esp8266?

With the 4051 you can connect up to 8 analog devices to the single analog pin on your ESP8266 (It also uses 3 digital pins, which I'll cover in a moment).

 

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