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Sam Denty edited this page Jul 16, 2017 · 2 revisions

Only able to connect to Wi-Fi network on some devices

This happens due to a channel conflict. Simply navigate to 192.168.4.1/settings.html on a device that is able to connect to the Wi-Fi network and change the Channel number from 1 to any number upto 14


espcomm_sync failed / espcomm_open when uploading

The ESP upload tool can't communicate with the chip

  • Reconnect the chip using a different USB port and cable.
  • Install the USB drivers (cp2102 or ch340)
  • Make sure the right COM port is selected.

Deauth attack won't work

If you see 0 pkts/s on the website then you've made a mistake. Check that you have followed the the installation steps correctly and that the right SDK installed, it must be version 2.0.0! If it can send packets but your target doesn't loose its connection, then the Wi-Fi router either uses 802.11w and it's protected against such attacks, or it communicates on the 5GHz band, which the ESP8266 doesn't support because of its 2.4GHz antenna.


If you have other questions or problems with the ESP8266 you can also check out the official community forum.