#include "NameDictionary.h" const String device_id = String(ESP.getChipId(), HEX); String name; NameDictionary d; void setup() { // put your setup code here, to run once: Serial.begin(115200); Serial.println("\n\nESP8266 ID Look Up Test"); Serial.println("Device ID: " + device_id); String name = d.get(device_id); if (name == "null") { name = device_id; Serial.print("!!! This device doesn't have a name yet. Let's call it: " + name); } else { Serial.print("Device name: " + name); } } void loop() { // put your main code here, to run repeatedly: }