ESP8266 Community Forum

How to change the default access point name of nodemcu (AI Thinkerxxxx to some other name)? Does it require any changes in library?

I think these kinds of questions actually belong in the ** Newbie Corner ** forums

That having being said: when using a project (eg. an Arduino sketch), there's always an option that lets you configure the required settings, like SSID, channel-number, etc.
When using AT commands, you'll have to use the AT+CWSAP-command

For instance:

Which will set the access point with settings:

• SSID: QuickFix
• Password: <empty> (no password required, resulting in an open AP)
• Channel: 1
• Encryption: <none> (no encryption used)

To review the current settings enter the following:

I have designed a custom development board using ESP8266 chip. By default, it shows AI-THINKERXXXX as a network(without uploading any sketch). What changes should I make to change that name to other name?

Just enter the AT+CWSAP= command (with the required parameters) like in my previous reply above.