Arduino: NodeMCU ESP8266 IoT Wifi Relay Sensor Dashboard App

Inspect the NodeMCU ESP8266 board, DHT22 and DS18B20 sensors, and a four-channel relay module. Understand 3.3V operation, USB power, and pull-up resistor requirements.

View block diagram for the NodeMCU ESP8266 IoT relay sensor dashboard, showing usb power, 3.3v to the ESP8266 and sensors, and 5v to the relay shield with three gpio controls.

design a fritzing schematic for a nodeMCU esp8266 iot setup, wiring dht22 sensors and a four-channel relay, configure 3.3v rails, pull-ups, and data signals for a functional breadboard prototype.

Connect components on a breadboard to assemble a NodeMCU ESP8266 based four-channel relay and DHT22 sensor, wiring power, grounds, pull-ups, and data lines for a working IoT dashboard.

Learn to download a compatible Arduino IDE version, install the ESP8266 board manager, and configure the filesystem tool to program a NodeMCU ESP8266 using the Arduino IDE.

Install Visual Studio Code with the Microsoft Arduino extension and the C/C++ Intellisense extension, then configure Arduino commands, serial port, and board settings for development.

Download, install, and set up the code editor, then install web development packages: Atem Beautify, Edenton JS, Emet, pigments, and Atem ASML Prevue to build and preview the dashboard.

Build a web dashboard for the NodeMCU ESP8266 IoT relay project, featuring a five-box interface with switch control, two sensors, live charts, and logs via web sockets.

Create a starter HTML and CSS template for a web dashboard application, link the styles file, and style the header, page id, and a content container with mock content.

Create and style five UI boxes for a web dashboard, including switch, sensor charts, latest data, and logs, then apply responsive media queries to adapt layouts across devices.

Learn to build a switch control user interface box for an IoT dashboard by integrating HTML and CSS with JavaScript, customizing relay switch components, and aligning styles for three switches.

Define and finalize the web dashboard UI by building sensor boxes with font awesome icons, containers, and placeholders for live DHT temperature and humidity.

Debug and fix HTML and CSS for a web dashboard app, using the HTML preview to test responsiveness and resolving margins, gaps, and syntax errors.

Explore the MVVM pattern with ko.js to build dynamic web dashboards for ESP8266, using Knock-Out's view models, observable data, declarative bindings, and Ajax-driven server data.

Develop dynamic content for an embedded web dashboard using knockout.js in JavaScript, building status and config view models, rendering relay names and switches, loading data, charts, and updating sensors.

Develop last values and logs view models, fetch data with Ajax, map server data to observables, and bind the results to the UI for a real-time sensor dashboard.

Define the graph view model and configure chart labels, colors, and datasets to visualize relay data, temperature, and humidity. Implement ajax updates to refresh the dashboard in real time.

Implement the main view model and relay button logic to initialize the dashboard, manage relay states with observables, and bind the UI while showing a loading screen until initialization completes.

Finish building the dashboard with a live update loop and WebSocket relay states to the ESP8266, and implement cookie toggles for logs and data tables.

Explore the ESP8266 nodeMCU firmware architecture, detailing main, wifi, sensors, relay, and web server sections, how it serves pages from flash and handles ajax, web socket, and sensor data.

Build the Arduino ESP8266 firmware skeleton by implementing the main setup and loop, adding serial debug, and outlining Wi-Fi, sensors, relays, and a web server.

Create a wifi module for the node mcu esp8266 IoT dashboard app, implementing wifi setup and loop, with ssid, password, and non blocking led indicator timing.

this lecture covers building the relay module with three relay defines, initializing pins as outputs, and implementing a relay setup and a relay state function to control on/off.

Develop a sensors module for the ESP8266 project using DHT22 and Dallas temperature readers, exposing globals, and non-blocking multitasking with millis to assemble readings.

Set up an ESP8266 web server module with ESPAsyncWebServer, serving a home page and handling status, config, and last values requests, while constructing JSON sensor and relay state responses.

Finish the web server module by implementing websockets and adapting a reference function to handle json messages, parsing relay state and controlling relays.

Save and load configuration data to an emulated eeprom on the ESP8266, using a 512-byte EPROM block and functions to load, save, and apply relay states.

Build, compile, and deploy your ESP8266 IoT project while debugging common syntax, logical, and semantic errors; verify code in Arduino and Visual Studio Code and prepare for testing.

Deploy and test the NodeMCU ESP8266 IoT dashboard using the Arduino IDE, upload and debug firmware and web data, verify sensors, relays, and charts via serial monitor and browser IP.