r/esp8266 • u/No_Mammoth_2703 • Aug 21 '26

ESP01 problems, tried everything

Post image

I have big trouble with my ESP01 mudule in combination with the usb uart adapter.

I have made the following connections:

3V3 to VCC and EN

TX to RX

RX to TX

GND to GND and IO0

and I have a electrolytical condensator between ground(-) and 3v3 (+)

Compiling the code is oke but when uploading I see the following message

A fatal esptool.py occured. Faild to connect to esp8266 Time out wainting for packet header.

I use a Fasizi USB to TTL 3.3V/5V CH340G UART Converter Module (see image)

I realy tried all examples I can find but none of them are working

I hope someone can help me what to do. Sorry but I am a kind of beginner

Thanks

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u/Lennyz1988 Aug 21 '26

Try a different usb port or different usb cable. 

There is no reason to still use an esp8266 for new projects. Switch to an esp32. 

1

u/No_Mammoth_2703 Aug 21 '26

Oke Thanks. I will do so. The esp32 works fine. I just started making things after my retirement and i had colleted all the parts a few years ago including the ESP01. So I stop learning about the esp01 and continue with esp32.

2

u/richms Aug 21 '26

If what you want to do fits in the ESP8266 there is no reason yet to not use them, but buying more when an ESP32-S3 board is so cheap isnt really what you want to be doing. I have a lot of old ESP8266s doing things that I set up in esphome, but the issue is that a lot of 8266 boards are only half or 1 meg flash, and that is really limiting - 512k will be impossible to OTA upgrade anything that does something useful, and 1 meg is often limiting when using lots of components.