How to read NodeMCU GPIO pin status?

Question

I am setting up a page on NodeMCU running as a web server and I want to be able to turn on and off a light based on the url being clicked.

I want to know how I can get the status so that I can set the URL based on the pin status as well as pass the GPIO pin status in the JSON from the NodeMCU web server.

The code is here.

Answer 1

Independent of the setting of port direction (input or output), pin can be read through the digitalRead():

int pin_light = 3;
int status = digitalRead(pin_light);