Building a Bluetooth-Controlled Firework Launcher with BT Lab

This project shows you how to build a wireless 2-axis rotation firework launcher using an Arduino Nano, two MG995 servos, and the BT Lab app. This setup allows you to control movement and a trigger relay from your phone.

BT Lab App Setup

To control your hardware, follow these steps to configure the app:

Download & Open: Open the BT Lab app on your Android device.

Pair Bluetooth: Go to your phone's Bluetooth settings and pair with the HC-06 module (usually the default PIN is 1234 or 0000).

Connect: In BT Lab, select the HC-06 device from the list to establish a connection.

Interface Configuration.

Follow the images below to create a push button and two sliders to set up the interface in BT Lab. First, open the Control feature within the BT Lab app.

#include <Servo.h>
Servo s1;
Servo s2;

void setup() {
  s1.attach(3);
  s2.attach(4);
  pinMode(2 , OUTPUT);
  Serial.begin(9600);

}
String data;

void loop() {

  if(Serial.available()){
    char val = Serial.read();
    if(val == '\n'){
      action();
      data = "";
    }else{
      data += val;
    }
  }
  

}

void action(){
  char tag = data[0];
  int val = data.substring(1).toInt();

  switch(tag){
    case 'B':
    digitalWrite(2 , val == 1 ? HIGH : LOW);
    break;
    case 'X':
    s1.write(val);
    break;
    case 'Y':
    s2.write(val);
    break;
  }

}