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esp8266 invalid head of packet (0x00) error

https://www.esp8266.com/viewtopic.php?f=160&t=22655

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esp8266 invalid head of packet (0x00) error

PostPosted: Sat Apr 03, 2021 5:09 pm
by anonymous_aqa
Hello,

We are trying to communicate between an Arduino Uno and ESP8266 Wifi module; however, during uploading and connecting we keep receiving the invalid head of packet (0x00) error.

The board configuration is attached and shown (ignore the wires crossed out).

Thanks for any help!

Re: esp8266 invalid head of packet (0x00) error

PostPosted: Mon Apr 05, 2021 12:52 pm
by jankop
Insufficient 3.3V power supply.
RS232 level converter from 5V to 3V3 is missing.
Untreated pins RESET, GPIO0
Wrong program.
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