This is the code for my calculator. Before using, make sure you have the TM1637Display.h and BluetoothSerial.h libraries installed. #include <BluetoothSerial.h> #include <TM1637Display.h> BluetoothSerial SerialBT; // —- TM1637 Pins —- #define CLK 13 #define DIO 14 TM1637Display display(CLK, DIO); // —- Buzzer Pin —- #define BUZZ 25 // —- Calculator Variables —- String inputBuffer = “”; // —- Error Buzzer …
This is the code for my ESP32 Bluetooth Controlled clock. It is a 12 hour clock and it requires the BluetoothSerial.h and TM1637Display.h libraries. #include <BluetoothSerial.h> #include <TM1637Display.h> BluetoothSerial SerialBT; // —- TM1637 Pins —- #define CLK 13 #define DIO 14 TM1637Display display(CLK, DIO); // —- Clock Variables —- int hours = 12; int minutes = 0; bool setMode = …
For the code to work, you need to have the app called Arduino Bluetooth Control and you will need to have the BluetoothSerial.h library. #include <BluetoothSerial.h> BluetoothSerial SerialBT; // Your pin assignments #define RED_PIN 12 #define GREEN_PIN 14 #define BLUE_PIN 27 void setup() { Serial.begin(115200); SerialBT.begin(“ESP32_LED”); ledcAttachPin(RED_PIN, 0); ledcAttachPin(GREEN_PIN, 1); ledcAttachPin(BLUE_PIN, 2); …
These are the pieces for my tiny 3d printed siren. It comes with 3 parts, the part where the motor mounts, the stator part with the holes and the spinning chopper part.
If you want to make a bluetooth controlled siren, make sure you have the BluetoothSerial.h library and make sure you are using the Arduino Bluetooth Control app. I am using the pin 27 on the ESP32 to control the base pin on an NPN transistor to PWM control the GND pin. One wire is connected to one of the pins …
