ESP8266 Community Forum

ESP8266 does not connect after uploading the code. The error is selected serial port not found. Sometimes the error is timed out waiting for packet header. I tried changing the ESP8266 module as well as the USB cable. My drivers are also updated.
What should I do?

Sounds like a faulty module. Maybe the USB to TTL converter is not working. You'd better contact your supplier.

Before hopping over to the supplier:

• Did it work in the past?
• What have to tried yourself to get it going?
• Do you already have any experience working with (other) controllers or are you new at this?
• Do you get a boot message after reset?
• What ESP board are you using (module or development board)?
• What tools are you using (Arduino, LUA, ...)?
• What does your general setup look like (photo's schematics, ...)?

We're willing to help you, but you really need to give us something to go on.

I am using Arduino IDE 1.8.15 and ESP8266 NodeMCU (12E) . It did not work in the past. This is the first time I am using the device. We are using 2 laser modules and laser sensor modules to be interfaced with the ESP. When I upload the code, I get a message timed out waiting for packet header. The blue light blinks on the module, but its not connecting. I tried changing the USB cable, as well as the ESP module. Is it because of the drivers?