Blynk IoT App with Arduino Uno R3, ESP8266 ESP-01 Module, Blynk Cloud and 4 x LED - Tutorial

Overview

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Learn to create a 4-LED IoT device using Arduino Uno R3, ESP8266 ESP-01 module, and Blynk IoT (2.0) in this comprehensive 40-minute tutorial. Begin with an introduction to the project and review the Fritzing diagram. Explore the necessary components and learn how to set the UART/Baud Rate of the ESP-01 module. Follow step-by-step instructions for building the device, signing up for a Blynk Cloud account, and creating templates for datastreams and dashboards. Set up the mobile dashboard using Developer Mode in the Blynk IoT smartphone app. Develop code for the IoT device using Blynk Example Browser and Arduino IDE, and create a new device on Blynk Cloud. Install the required Blynk Library in Arduino IDE, upload the code to your device, and test the WiFi/Blynk connection. Finally, verify the functionality of your IoT device using both the Blynk IoT app and Blynk Cloud web dashboard. Includes important links, resources, and notes on SDK compatibility for the ESP8266 ESP-01 module.

Syllabus

Note 18/6/2022: Seen at , the AT command for checking UART/Baud Rate on your ESP8266 ESP-01 only appears to work if the module is flashed with SDK 2.x or above. In other words, if your module has the older 1.3.0 SDK the 'AT+UART?' command will simply give an 'ERROR' message on the serial monitor. However, you can still set the UART/Baud Rate using 'AT+UART=38400,8,1,0,1' regardless of which SDK your module has. If you're not sure which SDK version your ESP8266 ESP-01 module has, simply type 'AT+GMR' in the Serial Monitor and it will tell you.
- 1. Introduction
- 2. Fritzing Diagram
- 3. Device Components for 4-LED IoT Device
- 4. Setting UART/Baud Rate of ESP-01 Module
- 5. Building the 4-LED IoT Device
- 6. Signing up for a new Blynk / Blynk Cloud account
- 7. Creating a template Datastreams & Web Dashboard on Blynk Cloud
- 8. Setting up Mobile Dashboard w/Developer Mode on Blynk IoT smartphone app
- 9. Creating Code for 4-LED IoT Device #1 Blynk Example Browser & Arduino IDE
- 10. Creating a New Device on Blynk Cloud
- 11. Creating Code for 4-LED IoT Device #2 Blynk Example Browser & Arduino IDE
- 12. Installing Blynk Library for ESP8266_Lib.h to Arduino IDE
- 13. Uploading Code to 4-LED IoT Device
- 14. Testing WiFi/Blynk Connection of Device via. Serial Monitor
- 15. Testing Device w/Blynk IoT App & Blynk Cloud Web Dashboard
- 16. End