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

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