#include "NimBLEDevice.h"

void setup() {
  Serial.begin(115200);
}

void loop() {
  Serial.println(esp_timer_get_time());
  delay_ms(2000);
  Serial.println(HELLO);
}

void delay_ms(uint64_t ms) {
  uint64_t m = esp_timer_get_time();
  if(ms){
    uint64_t e = (m + (ms * 1000));
    if(m > e){ //overflow
        while(esp_timer_get_time() > e) { }
    }
    while(esp_timer_get_time() < e) {}
  }
}