In this tutorial we are making ESP8266 NodeMCU as TCP Socket Server for bidirectional communication. Before we start directly on Socket programming let’s have some understanding of what is TCP Socket.
Continue reading ESP8266 NodeMCU TCP Socket Server Arduino Example
In this tutorial we will learn How to interface NodeMCU with RC522 RF ID Reader using Arduino library for MFRC522 and other RFID RC522 based modules.
This library read and write different types of Radio-Frequency IDentification (RFID) cards on your Arduino or NodeMCU using a RC522 based reader connected via the Serial Peripheral Interface (SPI) interface. Before we move to actual code lets know more about RF ID.
In this tutorial we upload a text file and read it in serial monitor.
ESP8266FS is a tool which integrates into the Arduino IDE. It adds a menu item to Tools menu for uploading the contents of sketch data directory into ESP8266 flash file system.
Download the tool: https://github.com/esp8266/arduino-esp8266fs-plugin/releases/download/0.1.3/ESP8266FS-0.1.3.zip.
In above process we uploaded notes.txt file in ESP flash. In this program we read it and display its contents in serial monitor. Uploading of sketch will not affect sketch data. i.e. uploaded notes.txt file.
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/* * ESP8266 Communication and Protocols * SPIFFS Direct File Upload Example * -Manoj R. Thkuar */ #include <ESP8266WiFi.h> #include <FS.h> //Include File System Headers const char* file = "/notes.txt"; //Enter your file name void setup() { delay(1000); Serial.begin(115200); Serial.println(); //Initialize File System SPIFFS.begin(); Serial.println("File System Initialized"); File dataFile = SPIFFS.open(file, "r"); //Open File for reading Serial.println("Reading Data from File:"); //Data from file for(int i=0;i<dataFile.size();i++) //Read upto complete file size { Serial.print((char)dataFile.read()); //Read file } dataFile.close(); } void loop() { } |
In serial monitor you will get File contents, you can upload images, html and javascript files. examples can be found here
In this tutorial, we’ll learn how to program your NodeMCU or ESP8266 using an Arduino IDE. NodeMCU board is not available by default.
The NodeMCU ESP8266 is a low-cost WiFi module built by Espressif Systems. Its popularity has been growing among the hardware community thanks to its nice features and stability, to the point that it can be easily programmed using your Arduino IDE.
Note: Sometimes pakage_esp8266com_index.json link is down due to heavy download try again after few hours.
This example shows how to use jQuery in ESP8266, NodeMCU ? There are two ways to use jQuery in ESP8266 Web Sever, first is to use cdn server and second is directly putting jQuery on ESP Flash File System. We will look into both examples. We make use of jQuery Knob to demonstrate real time fading of LED control using jQuery and AJAX requests.