/*
 * Tool to rename your HM-10 bluetooth dongle
 * v1.01 - 20211201
 * 
 * 1. Change the name you want for your robot from "ESCORNABOT" to something
 *    different in the first "#define" line of the code.
 * 2. Unplug the VCC wire from the dongle.
 * 3. Upload this Arduino sketch to your Escornabot.
 * 4. Replug the VCC wire to the dongle and restart the Escornabot:
 *    after two seconds, you should see the onboard LED flashing twice
 *    (first check), and after two more seconds, it should flash five more
 *    times if everything went OK (second check).
 * 5. Reflash your Escornabot with its original firmware again (remember to
 *    unplug the VCC wire in the dongle before uploading and reconnect it
 *    after finishing) and enjoy!
 *    (https://www.roboteach.es/escornabot-firmware/)
 */

#define BOTNAME "ESCORNABOT"


/* 
 * >>>>  Rest of the code: DO NOT TOUCH :)  <<<< 
 */
String answer;

void blinkLED(int times) {
  for (int i=0; i<times; i++) {
    digitalWrite(LED_BUILTIN, LOW);
    delay(300);
    digitalWrite(LED_BUILTIN, HIGH);
    delay(100);
  }
  digitalWrite(LED_BUILTIN, LOW);
}

void setup() {
  // initial config
  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, LOW);
  Serial.begin(9600);

  // initial check
  delay(2000);
  Serial.write("AT\r\n");
  answer = Serial.readStringUntil('\n');
  if (answer=="OK\r") {
    blinkLED(2);
    delay(2000);
  } else {
    while (true); // halt
  }

  // change name
  Serial.write("AT+NAME");
  Serial.write(BOTNAME);
  Serial.write(0); // this does the trick to remove CRLF from the name itself for the BT-05!
  Serial.write("\r\n");

  // check answer
  String valid = "+NAME=";
  valid.concat(BOTNAME);
  valid.concat("\r");
  answer = Serial.readStringUntil('\n');
  if (answer==valid) {
    blinkLED(5);
  }
}

void loop() {
}