ESP8266 Community Forum

When i read ESP8266EX Spec, i read that this modul can using protocol 802.11N.
I try to configure my router to N Channel for make connection more fast, but when i change the router to N channel, ESP can't connect to router

this is picture when the channel was B/G/N


and when i change the band to only N, all ESP can't connect

There are 2 flavors of "N" ... one is 2.4GHz the other is up around 5GHz. Of course, the ESP8266 can only connect to the lower frequency.

IMO: The ESP8266 will do just as well on a "G" channel as an "N" ... yes, the bandwidth is greater on the "N" from a specification point-of-view but my belief (untested) is that the ESP8266 programmed under Arduino will see very little, if any, performance difference between G and N. I suspect "N" is just there for completeness.

From Wikipedia:

802.11n[edit]
Main article: IEEE 802.11n-2009
802.11n is an amendment that improves upon the previous 802.11 standards by adding multiple-input multiple-output antennas (MIMO). 802.11n operates on both the 2.4 GHz and the 5 GHz bands. Support for 5 GHz bands is optional. It operates at a maximum net data rate from 54 Mbit/s to 600 Mbit/s. The IEEE has approved the amendment, and it was published in October 2009.[15][16] Prior to the final ratification, enterprises were already migrating to 802.11n networks based on the Wi-Fi Alliance's certification of products conforming to a 2007 draft of the 802.11n proposal.

Ray