![SOLVED!!!) Arduino Uno with ESP8266 not working over COM3 - Networking, Protocols, and Devices - Arduino Forum SOLVED!!!) Arduino Uno with ESP8266 not working over COM3 - Networking, Protocols, and Devices - Arduino Forum](https://aws1.discourse-cdn.com/arduino/original/4X/f/5/a/f5a8039be81ac25e29008a7f627b2a87cfbc6013.jpeg)
SOLVED!!!) Arduino Uno with ESP8266 not working over COM3 - Networking, Protocols, and Devices - Arduino Forum
![How to fix: Serial Port 'COM3' not found. | Electronics Forum (Circuits, Projects and Microcontrollers) How to fix: Serial Port 'COM3' not found. | Electronics Forum (Circuits, Projects and Microcontrollers)](https://www.electro-tech-online.com/data/avatars/l/253/253319.jpg?1405386730)
How to fix: Serial Port 'COM3' not found. | Electronics Forum (Circuits, Projects and Microcontrollers)
![COM port number changes when connecting board on different ports or in bootloader mode – Arduino Help Center COM port number changes when connecting board on different ports or in bootloader mode – Arduino Help Center](https://support.arduino.cc/hc/article_attachments/360016532020/COM_port_changes_0.png)
COM port number changes when connecting board on different ports or in bootloader mode – Arduino Help Center
![Sketch compiles but will not upload on UNO; Cannot get Board info - Installation & Troubleshooting - Arduino Forum Sketch compiles but will not upload on UNO; Cannot get Board info - Installation & Troubleshooting - Arduino Forum](https://aws1.discourse-cdn.com/arduino/original/4X/c/2/9/c2985db22e04f597fd5614dde7a7c7b5aa7b27bc.png)
Sketch compiles but will not upload on UNO; Cannot get Board info - Installation & Troubleshooting - Arduino Forum
![Getting Started with Arduino – Beginner's Tutorial to Open-Source Hardware Prototyping with Arduino Uno - CIRCUITSTATE Electronics Getting Started with Arduino – Beginner's Tutorial to Open-Source Hardware Prototyping with Arduino Uno - CIRCUITSTATE Electronics](https://circuitstate.com/wp-content/uploads/2022/04/Getting-Started-with-Arduino-Open-Source-Electronics-Prototyping-Platform-Arduino-UNO-CIRCUITSTATE-Electronics-Featured-Image-01-2.jpg)
Getting Started with Arduino – Beginner's Tutorial to Open-Source Hardware Prototyping with Arduino Uno - CIRCUITSTATE Electronics
![SOLVED!!!) Arduino Uno with ESP8266 not working over COM3 - Networking, Protocols, and Devices - Arduino Forum SOLVED!!!) Arduino Uno with ESP8266 not working over COM3 - Networking, Protocols, and Devices - Arduino Forum](https://aws1.discourse-cdn.com/arduino/original/4X/8/5/1/85173f72f6894e04cc780ec57d822f04e7850c90.jpeg)