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By surya arief
schufti wrote:
const int led = 7; //pin on GPIO13 connected to LED

are you decided yet if the LED is on gpio 7 or 13 ?

If you intend to use nodemcu pin marked "D7" you should write
const int led = D7
or alternatively
const int led = 13

maybe that will make your code work ....

Still not word, const int led = 7 is not the problem,
The problem is I need esp8266 as accespoint, so if there is client connect, then led is on.