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I find trouble updating my firmware with esp8266 with following error message.

[espDownloader.py][line:351][ERROR]: Chip sync error: Failed to connect to ESP8266: Timed out waiting for packet header [2019-06-04 07:53:16,009][ESP8266Loader_spi[1]][espDownloader.py][line:439][ERROR]: ESP8266 Chip sync error esp_sync_blocking.

I am unable to resolve even after a number of attempts. Please help me resolve my issue. Thank you in advance.

  • is the module in flashing mode, by pulling io 0 LOW at boot? – Juraj Jun 4 '19 at 5:16
  • Yes m putting it in flash mode – user3185742 Jun 4 '19 at 6:00
  • does the original firmware answer over that port, cable and adapter? – Juraj Jun 4 '19 at 6:54
  • my original firmware provides Garbage data and displays ready command, but it doesn't answers any AT command. – user3185742 Jun 4 '19 at 7:08
  • read the 'garbage; at 74880 baud. it is the boot log. (some part will be always garbage or Chinese) send AT command at 115200 baud with both line ends set – Juraj Jun 4 '19 at 7:54

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