ESP8266 Community Forum

- Wed Feb 09, 2022 10:19 pm #93607 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?

- Fri Feb 11, 2022 8:33 am #93623 Sounds like a faulty module. Maybe the USB to TTL converter is not working. You'd better contact your supplier.

- Fri Feb 11, 2022 9:04 am #93626 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.

Assumption is the mother of all f*ckups. At least: that's what I'm assuming.

- Sat Feb 12, 2022 7:09 am #93631 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?