Getting Started With ESP-12E NodeMcu V3 Module Using ArduinoIDE

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Dheeraj Chumble8y ago
Hello. May i ask for some help. I have followed all the steps to add NodeMCU in arduino IDE 1.8.6. However i am still getting an "Error compiling for board NodeMCU 1.0(ESP 12E Module)", moreover i am unable to add Arduino Master zip library in arduino ide. It says this is not a valid library. I got stuck in these two errors since so many days. Plz somebody help me out. My mail id: "[email protected]"
Hadshana Kamalanathan8y ago
Nice Article
Alvaro Piffaretti8y ago
Please use a resistor for Led connection, it's a good practice, it's good to show proper handling of ICs.
JAYARAJ8y ago
Also pl advice node mcu and ardino was diffrent plot form hence why you used both litle bit confused. also c# coding was not running ! why used the microgear name sace.
JAYARAJ8y ago
I have some clarification . whether you used the wifi network or USB
JAYARAJ8y ago
Hiave some clarification
Pascal Hernandez8y ago
Hello, do you know where could we download the schematic from this board?
Mike Bolton8y ago
My first LoLin NodeMCU V3 board didn't work at all. The second connected OK via COM3. Drivers are OK. Board selected OK. COM port OK. Uploaded the 'blink' program. Got loads of error messages. Blue LED kept flashing. Espcomm_send_command(FLASH_DOWNLOAD_DATA) failed. Also 'wrong direction/ command: 0x01 0x03, expected 0x01 0x04. ' Something wrong here, but what?
Truth Seeker9y ago
I have a question about preparing the board that I did not see in your tutorial. CH341SER.zip I understand is the driver needed, that I installed, good. ESPlorer.zip Is a tool used to flash something to the module?LuaLoader.zip This is firmware? Needed so the module can be programmed with your sketch in arduino ide? You do not explain any of this, I am confused what to do with this file.
- Guest User8y ago
  ESPlorer.zip contains an IDE, wherein you can code your NodeMcu in MicroPython or Lua. Well, as far as this tutorial is concerned, you won't require this. Same is the case for flashing the firmware. You need to flash it to the EPROM and then get started with the Esplorer IDE. Hope I've cleared your doubts.
ravendra singh9y ago
Please make program for me connect 8ch relay with esp8266 e12
K C10y ago
You directly connect an led to the gpio output? no resistor needed to limit the current?
- Donovan Keith9y ago
  That was my question/concern too.
- Guest User8y ago
  As for the connection part, I agree with both of you, the led should have been connected via a resistor. Since, the power output from the GPIO was quite low, I had connected it directly to the LED legs. Henceforth, I'll include that as a CAUTION, in my upcoming tutorials.
Srijith Jayakumar10y ago
Thanks for the step. Blink working great
Prasanna Murali10y ago
Nice one...
Mohammed Ibrahim10y ago
nice
- Guest User10y ago
  Thank you Sir :)
Debasis Saha10y ago
Nice share
- Guest User10y ago
  Thank you so much,Sir :)
Asfend Yar10y ago
good job
- Guest User10y ago
  Thank you very much :) :)
Kumaresh Rajalingam10y ago
Good start keep it up..
- Guest User10y ago
  Thanks a lot :)
Ammar Shaukat10y ago
Electrical Engineering is not my field .. so have fun :)
- Guest User10y ago
  Thanks :)
Vignesh Mani10y ago
nice
- Guest User10y ago
  Thanks :)
Kashif Sohail10y ago
nice article
- Guest User10y ago
  Thank you,Sir :)

Introduction

Today, we'll study the basics of the ESP-12E NodeMcu V3 module. We will also see the basic connection scheme for blinking-led using Arduino IDE later in this tutorial.

Q>> What is an ESP-12E NodeMcu V3 module?

A>> NodeMCU is an LUA based interactive firmware for Expressif ESP8622 Wi-Fi SoC, as well as an open-source hardware board that, unlike the $3 ESP8266 Wi-Fi modules, includes a CP2102 TTL to USB chip for programming and debugging, is breadboard-friendly, and can simply be powered via its micro USB port.

This module is one of the cheapest available wifi-modules in market. V3 or Version3 is the latest version of this module. This tutorial, however, will facilitate you to connect all the versions of ESP8266 NodeMcu, i.e V1, V2 or V3.

For makers, having ESP-12 module, rest assured, 12E is no different from its precursor. The only difference: 6 extra GPIOs are present in ESP-12E

Headers: 15-pin header with access to GPIOs, SPI, UART, ADC, and power pins.
Power: 5V via micro USB port

Hardware Components required:

ESP 12E NodeMcu V3, A breadboard for placing the LED and a couple of Jumper wires to connect them.

This NodeMcu breakout module is built around ESP-12E board

Software required: Arduino (In a future tutorial, we'll see how to work in Lua)

But, since most of us are familiar with ArduinoIDE, let's ponder upon this for a while.

Header PINOUT: (Save this picture for future references)

NodeMcu header pin-out

After you've assembled all the hardware components, click on this link and download all the files. The file contains requisite drivers needed to use this module. This will save you a lot of time.

Now, the ZIP file you've just downloaded, will be put to use in this tutorial as well as in the forthcoming tutorials.

Well, it's very simple!

First of all, your ArduinoIDE needs to know that you want to use this NodeMcu module. That is, you need to select the right board. Confused? Follow this flowchart: (Tools, Board, then Boards Manager).

Next, select the requisite board.

Having done so, you can cross-check. (Tools, Board, then ESP8266 Modules)

Out of this entire list, you need to select "NodeMCU 1.0 (ESP-12E Module)" as in the figure below:

Now, select the correct port. Can't recognize the port?? Wait!

Check this out.....

Go to the Device Manager and update the driver. (Follow the GIF below)

Now, its a matter of few minutes before you can get started.... Let's proceed.

Connecting the LED to NodeMcu: (Zoomed-snapshot of the Circuit)

I hope this Graphic illustration will be sufficient. But, in case these images don't load properly (due to slow network connections, etc.), you

can refer to the connection profile below.

Connection Profile:

Connect D7 pin (GPIO13 of NodeMcu) to the long leg of the LED (the positive leg, called the anode).
Connect G(Ground)pin of NodeMcu to the short leg of the LED (the negative leg, called the cathode)
Now, come back to the ArduinoIDE. You need to set up your preferences.
(File > Preferences)
Copy this URL and paste it in the Additional Boards Manager URLs option.

Final Task: Upload the code for Blinking an LED

void setup()
{
// initialize digital pin 13 as an output.
pinMode(13, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(13, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}

Next, run the code. And your job's done!

Congratulations! You've successfully interfaced with an ESP NodeMcu...and even Blinked an LED!

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