Integrating nextion display

void b0PopCallback(void *ptr) {
  return number;
}

It is pointless to try to return a value from a function who's return type is void.

NexTouch *nex_listen_list[] =

void subRoutine() {

  //  number = nexLoop(nex_listen_list);
  number = nex_listen_list;
  while (number < 100) {
    number = nex_listen_list;
  }

In the stupidly named function, set number to the address of the array of pointers. While that number is less than 100, do the same stupid thing forever.

I am POSITIVE that there is not an example in the known universe that does that.