# ESP-01 ESP8266 connection error: "Failed to connect to ESP8266: Timed out waiting for packet header"

**URL:** <https://forum.arduino.cc/t/esp-01-esp8266-connection-error-failed-to-connect-to-esp8266-timed-out-waiting-for-packet-header/1201648>\
**Category:** 3rd Party Boards\
**Created:** [December 18, 2023, 5:48pm UTC](https://forum.arduino.cc/t/esp-01-esp8266-connection-error-failed-to-connect-to-esp8266-timed-out-waiting-for-packet-header/1201648 "2023-12-18T17:48:14Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![xaimav](https://avatars.discourse-cdn.com/v4/letter/x/7ba0ec/32.png) [@xaimav](https://forum.arduino.cc/u/xaimav)\
**Post date:** [March 7, 2024, 9:30pm UTC](https://forum.arduino.cc/t/esp-01-esp8266-connection-error-failed-to-connect-to-esp8266-timed-out-waiting-for-packet-header/1201648/3 "2024-03-07T21:30:09Z")

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Sounds like you encountered the same issue I was, here is the thread where it was fixed:

> [@ESP-01S on Arduino MEGA 2560 - A fatal esptool.py error occurred: Failed to connect to ESP8266: Timed out waiting for packet header](https://forum.arduino.cc/t/esp-01s-on-arduino-mega-2560-a-fatal-esptool-py-error-occurred-failed-to-connect-to-esp8266-timed-out-waiting-for-packet-header/1232477/1):
>
> Hi! I've been trying to make an ESP-01S work with an Arduino MEGA 2560 for 3 days now, reading countless threads and guides without success. The equipment: Controllers: ESP-01S: [https://www.amazon.ca/dp/B00O34AGSU?psc=1&ref=ppx\_yo2ov\_dt\_b\_product\_details](https://www.amazon.ca/dp/B00O34AGSU?psc=1&ref=ppx_yo2ov_dt_b_product_details) Arduino MEGA 2560 R3: [https://www.amazon.ca/dp/B01H4ZLZLQ?psc=1&ref=ppx\_yo2ov\_dt\_b\_product\_details](https://www.amazon.ca/dp/B01H4ZLZLQ?psc=1&ref=ppx_yo2ov_dt_b_product_details) LF33CV: [https://www.mouser.ca/ProductDetail/STMicroelectronics/LF33CV?qs=LPKLnBpMevjK%252B28MZYQO9Q%3D%3D](https://www.mouser.ca/ProductDetail/STMicroelectronics/LF33CV?qs=LPKLnBpMevjK%252B28MZYQO9Q%3D%3D) Power supply 5V60A: [https://w…](https://www.amazon.ca/gp/product/B01D8FLZV6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1)

Good luck!

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