Kutluhan Aktar
Published © CC BY

BLE Mobile Star Wars Remote Lamp w/ Weather & Gas Station

I built this luminous lighting system and developed an Android app to control its various features and display real-time weather & gas data.

ExpertFull instructions provided10 hours2,512

Things used in this project

Hardware components

PCBWay Custom PCB
PCBWay Custom PCB
×1
Arduino Nano 33 BLE
Arduino Nano 33 BLE
×1
Waveshare 2.9'' E-Paper Module
×1
DHT22 temperature-humidity sensor
Adafruit DHT22 temperature-humidity sensor
×1
Creality CR-200B 3D Printer
×1
MQ-4 Air Quality Sensor
×1
MQ-7 Air Quality Sensor
×1
L9110 Keyes Fan Motor
×2
SparkFun Logic Level Converter - Bi-Directional
SparkFun Logic Level Converter - Bi-Directional
×2
2-Way Relay
×1
5mm Common Anode RGB LED
×1
Buzzer
Buzzer
×1
Through Hole Resistor, 20 kohm
Through Hole Resistor, 20 kohm
×2
Power Jack
×1
Jumper wires (generic)
Jumper wires (generic)
×1

Software apps and online services

Arduino IDE
Arduino IDE
KiCad
KiCad
Fusion 360
Autodesk Fusion 360
Ultimaker Cura

Hand tools and fabrication machines

Hot glue gun (generic)
Hot glue gun (generic)
Soldering iron (generic)
Soldering iron (generic)
Solder Wire, Lead Free
Solder Wire, Lead Free

Story

Read more

Custom parts and enclosures

BLE_Remote_Lamp_plug.stl

BLE_Remote_Lamp_main_case.stl

BLE_Remote_Lamp_lights.stl

Gerber Files

Fabrication Files

BLE_Remote_Lamp.aia

BLE_Remote_Lamp.apk

Images (.c files)

Schematics

PCB_1

PCB_2

PCB_3

PCB_4

PCB_5

PCB_6

Code

BLE_remote_lamp_w_weather_station.ino

Arduino
         /////////////////////////////////////////////  
        //   BLE Mobile Star Wars Remote Lamp      //
       //        w/ Weather & Gas Station         //
      //             ---------------             //
     //          (Arduino Nano 33 BLE)          //           
    //             by Kutluhan Aktar           // 
   //                                         //
  /////////////////////////////////////////////

//
// I built this luminous lighting system and developed an Android app to control its various features and display real-time weather & gas data.
//
// For more information:
// https://www.theamplituhedron.com/projects/BLE_Mobile_Star_Wars_Remote_Lamp_w_Weather_Gas_Station/
//
//
// Connections
// Arduino Nano 33 BLE :  
//                                Waveshare 2.9'' E-Paper Module
// 3.3V -------------------------- VCC
// GND --------------------------- GND
// D11 --------------------------- DIN
// D13 --------------------------- CLK
// D10 --------------------------- CS
// D9  --------------------------- DC
// D8  --------------------------- RST
// D7  --------------------------- BUSY
//                                DHT22 Temperature and Humidity Sensor
// D2  --------------------------- DATA
// 3.3V -------------------------- VCC
// GND --------------------------- GND
//                                MQ-4 Air Quality Sensor
// A0  --------------------------- S
//                                MQ-7 Air Quality Sensor
// A1  --------------------------- S
//                                2-Way Relay
// A2  --------------------------- IN_1
// A3  --------------------------- IN_2
// 5V  --------------------------- 5V
// GND --------------------------- GND
//                                RGB LEB (RAGB)
// A4  --------------------------- R
// A5  --------------------------- G
// A6  --------------------------- B
//                                Keyes Fan Motor - L9110 (Left)
// GND --------------------------- GND
// 5V  --------------------------- VCC
// D3  --------------------------- INA
// D4  --------------------------- INB
//                                Keyes Fan Motor - L9110 (Right)
// GND --------------------------- GND
// 5V  --------------------------- VCC
// D5  --------------------------- INA
// D6  --------------------------- INB
//                                Buzzer
// D12 --------------------------- +


// Include the required libraries.
#include <ArduinoBLE.h>
#include <GxEPD.h>
#include <GxIO/GxIO_SPI/GxIO_SPI.h>
#include <GxIO/GxIO.h>
#include "DHT.h"

// Create the BLE service:
BLEService BLE_remote_lamp("19B10000-E8F2-537E-4F6C-D104768A1214");

// Create data characteristics and allow the remote device (central) to write, read, and notify:
BLEFloatCharacteristic temperatureCharacteristic("19B10001-E8F2-537E-4F6C-D104768A1214", BLERead | BLENotify);
BLEFloatCharacteristic humidityCharacteristic("19B10002-E8F2-537E-4F6C-D104768A1214", BLERead | BLENotify);
BLEFloatCharacteristic mq4Characteristic("19B10003-E8F2-537E-4F6C-D104768A1214", BLERead | BLENotify);
BLEFloatCharacteristic mq7Characteristic("19B10004-E8F2-537E-4F6C-D104768A1214", BLERead | BLENotify);
BLEByteCharacteristic lamp_1_Characteristic("19B10005-E8F2-537E-4F6C-D104768A1214", BLERead | BLEWrite);
BLEByteCharacteristic lamp_2_Characteristic("19B10006-E8F2-537E-4F6C-D104768A1214", BLERead | BLEWrite);
BLEByteCharacteristic fan_L_Characteristic("19B10007-E8F2-537E-4F6C-D104768A1214", BLERead | BLEWrite);
BLEByteCharacteristic fan_R_Characteristic("19B10008-E8F2-537E-4F6C-D104768A1214", BLERead | BLEWrite);
BLEByteCharacteristic RGB_Characteristic("19B10009-E8F2-537E-4F6C-D104768A1214", BLERead | BLEWrite);

// Define the DHT22 temperature and humidity sensor settings and the DHT object.
#define DHTPIN 2
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// Select the required display class for the Waveshare 2.9" e-Paper module.
#include <GxGDEM029T94/GxGDEM029T94.h> // 2.9" b/w

// Define the required pin settings for the Waveshare 2.9" e-Paper module.
GxIO_Class io(SPI, /*CS=*/ 10, /*DC=*/ 9, /*RST=*/ 8); 
GxEPD_Class display(io, /*RST=*/ 8, /*BUSY=*/ 7);

// Include BMP (monochrome) images as C arrays.
#include "falcon.c"
#include "bluetooth.c"
#include "sun.c"
#include "humidity.c"
#include "gas.c"
#include "error.c"

// Define fonts.
#include <Fonts/FreeSans9pt7b.h>

// Define the gas sensor pins.
#define mq_4 A0
#define mq_7 A1

// Define the L9110 fan motor control pins.
#define L_INA 3
#define L_INB 4
#define R_INA 5
#define R_INB 6

// Define the 2-way relay pins.
#define IN1 A2
#define IN2 A3 

// Define the RGB LED pins:
#define redPin   A4
#define greenPin A5
#define bluePin  A6

#define buzzer 12

// Define the data holders:
float humidity, temperature, hic;
int mq_4_val, mq_7_val, threshold = 750;
long timer;
volatile boolean _connected = false;

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

  pinMode(buzzer, OUTPUT);
  pinMode(L_INA, OUTPUT);
  pinMode(L_INB, OUTPUT);
  pinMode(R_INA, OUTPUT);
  pinMode(R_INB, OUTPUT);
  pinMode(IN1, OUTPUT);
  pinMode(IN2, OUTPUT);
  digitalWrite(IN1, HIGH);
  digitalWrite(IN2, HIGH);
  digitalWrite(L_INA, LOW);
  digitalWrite(L_INB, LOW);
  digitalWrite(R_INA, LOW);
  digitalWrite(R_INB, LOW);
  // RGB:
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
  adjustColor(255,255,255);
  
  // Initialize the 2.9" e-Paper module and print errors, if any.
  display.init(115200);
  display.setRotation(1);

  // Initialize the DHT22 sensor.
  dht.begin();

  // Check the BLE initialization status:
  while(!BLE.begin()){
    Serial.println("BLE initialization is failed!");
    err_msg();
  }
  Serial.println("\nBLE initialization is successful!\n");
  // Print this peripheral device's address information:
  Serial.print("MAC Address: "); Serial.println(BLE.address());
  Serial.print("Service UUID Address: "); Serial.println(BLE_remote_lamp.uuid()); Serial.println();

  // Set the local name this peripheral advertises: 
  BLE.setLocalName("BLE Remote Lamp");
  // Set the UUID for the service this peripheral advertises:
  BLE.setAdvertisedService(BLE_remote_lamp);

  // Add the given data characteristics to the service:
  BLE_remote_lamp.addCharacteristic(temperatureCharacteristic);
  BLE_remote_lamp.addCharacteristic(humidityCharacteristic);
  BLE_remote_lamp.addCharacteristic(mq4Characteristic);
  BLE_remote_lamp.addCharacteristic(mq7Characteristic);
  BLE_remote_lamp.addCharacteristic(lamp_1_Characteristic);
  BLE_remote_lamp.addCharacteristic(lamp_2_Characteristic);
  BLE_remote_lamp.addCharacteristic(fan_L_Characteristic);
  BLE_remote_lamp.addCharacteristic(fan_R_Characteristic);
  BLE_remote_lamp.addCharacteristic(RGB_Characteristic);

  // Add the service to the device:
  BLE.addService(BLE_remote_lamp);

  // Assign event handlers for connected and disconnected devices to/from this peripheral:
  BLE.setEventHandler(BLEConnected, blePeripheralConnectHandler);
  BLE.setEventHandler(BLEDisconnected, blePeripheralDisconnectHandler);

  // Assign event handlers for the data characteristics modified (written) by the central device (via the Android application).
  // Then, obtain the transferred (written) commands from the Android application over BLE.
  lamp_1_Characteristic.setEventHandler(BLEWritten, get_commands);
  lamp_2_Characteristic.setEventHandler(BLEWritten, get_commands); 
  fan_L_Characteristic.setEventHandler(BLEWritten, get_commands);
  fan_R_Characteristic.setEventHandler(BLEWritten, get_commands);
  RGB_Characteristic.setEventHandler(BLEWritten, get_commands);
  
  // Start advertising:
  BLE.advertise();
  Serial.println(("Bluetooth device active, waiting for connections..."));

  delay(5000);
  timer = millis();
}

void loop(){
  // Every minute, advertise (transmit) the collected weather and gas data to the Android application over BLE.
  if(millis() - timer > 60*1000){
    collect_weather_data();
    // Show the collected data on the Waveshare 2.9" e-Paper module.
    home_screen(1);
    // Update characteristics:
    update_characteristics();
    // Update the timer:
    timer = millis();
  }
  
  // Poll for BLE events:
  BLE.poll();
}

void update_characteristics(){
  // Update all weather and gas data characteristics (floats):
  temperatureCharacteristic.writeValue(temperature);
  humidityCharacteristic.writeValue(humidity);
  mq4Characteristic.writeValue(float(mq_4_val));
  mq7Characteristic.writeValue(float(mq_7_val));
  Serial.println("\n\nBLE: Weather and Gas Data Characteristics Updated Successfully!\n");
}

void get_commands(BLEDevice central, BLECharacteristic characteristic){
  // Get the recently transferred commands over BLE.
  if(characteristic.uuid() == lamp_1_Characteristic.uuid()){
    Serial.print("\nLamp (1) => "); Serial.println(lamp_1_Characteristic.value());
    switch(lamp_1_Characteristic.value()){
      case 0: digitalWrite(IN1, HIGH);  break;
      case 1: digitalWrite(IN1, LOW);   break;
    }
  }
  if(characteristic.uuid() == lamp_2_Characteristic.uuid()){
    Serial.print("Lamp (2) => "); Serial.println(lamp_2_Characteristic.value());
    switch(lamp_2_Characteristic.value()){
      case 0: digitalWrite(IN2, HIGH);  break;
      case 1: digitalWrite(IN2, LOW);   break;
    }
  }
  if(characteristic.uuid() == fan_L_Characteristic.uuid()){
    Serial.print("Fan (L) => "); Serial.println(fan_L_Characteristic.value());
    switch(fan_L_Characteristic.value()){
      case 0: digitalWrite(L_INA, LOW); digitalWrite(L_INB, LOW);  break;
      case 1: digitalWrite(L_INA, HIGH); digitalWrite(L_INB, LOW); break;
      case 2: digitalWrite(L_INA, LOW); digitalWrite(L_INB, HIGH); break;
    }
  }
  if(characteristic.uuid() == fan_R_Characteristic.uuid()){
    Serial.print("Fan (R) => "); Serial.println(fan_R_Characteristic.value());
    switch(fan_R_Characteristic.value()){
      case 0: digitalWrite(R_INA, LOW); digitalWrite(R_INB, LOW);  break;
      case 1: digitalWrite(R_INA, HIGH); digitalWrite(R_INB, LOW); break;
      case 2: digitalWrite(R_INA, LOW); digitalWrite(R_INB, HIGH); break;
    }
  }
  if(characteristic.uuid() == RGB_Characteristic.uuid()){
    Serial.print("RGB => "); Serial.println(RGB_Characteristic.value());
    switch(RGB_Characteristic.value()){
      case 0: adjustColor(0,0,0);       break;
      case 1: adjustColor(255,0,0);     break;
      case 2: adjustColor(0,255,0);     break;
      case 3: adjustColor(0,0,255);     break;
      case 4: adjustColor(255,0,255);   break;
      case 5: adjustColor(255,255,0);   break;
      case 6: adjustColor(0,255,255);   break;
      case 7: adjustColor(255,255,255); break;
    }
  }
}

void collect_weather_data(){
  delay(2000);
  humidity = dht.readHumidity();
  temperature = dht.readTemperature(); // Celsius
  // Compute the heat index in Celsius (isFahreheit = false).
  hic = dht.computeHeatIndex(temperature, humidity, false);

  // Get measurements generated by the gas sensors.
  mq_4_val = (analogRead(mq_4) * 3.3) / 5;
  mq_7_val = (analogRead(mq_7) * 3.3) / 5;

  // Notify the user if the evaluated gas measurements exceed the given threshold.
  while(mq_4_val > threshold || mq_7_val > threshold){
    digitalWrite(buzzer, HIGH); delay(10000); digitalWrite(buzzer, LOW); err_msg();
    mq_4_val = (analogRead(mq_4) * 3.3) / 5;
    mq_7_val = (analogRead(mq_7) * 3.3) / 5;
  }
  
  Serial.print(F("\nHumidity: ")); Serial.print(humidity); Serial.println("%");
  Serial.print(F("Temperature: ")); Serial.print(temperature); Serial.println(" C");
  Serial.print("Heat Index: "); Serial.print(hic); Serial.println(" C");
  Serial.print("MQ-4 (Methane): "); Serial.println(mq_4_val);
  Serial.print("MQ-7 (Carbon Monoxide): "); Serial.println(mq_7_val);
  Serial.println("\n");
}

void home_screen(int _clear){
  display.fillScreen(GxEPD_WHITE);
  display.setTextColor(GxEPD_BLACK);
  // Images:
  int l_offset = 30;
  int x_offset = 3;
  int e_offset = 50;
  int y_offset = ((display.height()/2)-40)/2;
  display.drawExampleBitmap(gImage_falcon, (display.width()/2)+25, 0, 128, 128, GxEPD_BLACK);
  display.drawExampleBitmap(gImage_sun, x_offset-1, y_offset, 40, 39, GxEPD_BLACK);
  display.drawExampleBitmap(gImage_gas, (display.width()/2)+l_offset-x_offset-24-e_offset, y_offset, 24, 40, GxEPD_BLACK);
  display.drawExampleBitmap(gImage_humidity, x_offset, (display.height()/2)+y_offset, 40, 39, GxEPD_BLACK);
  if(_connected){ display.drawExampleBitmap(gImage_bluetooth, (display.width()/2)+l_offset-x_offset-e_offset+10, (display.height()/2)+y_offset, 29, 40, GxEPD_BLACK); }
  else{ display.drawExampleBitmap(gImage_not_connected, (display.width()/2)+l_offset-x_offset-e_offset, (display.height()/2)+y_offset, 39, 40, GxEPD_BLACK); }
  // Frames (Borders):
  display.drawRect(0, 0, display.width(), display.height(), GxEPD_BLACK);
  display.drawRect((display.width()/2)+l_offset, 0, (display.width()/2)-l_offset, display.height(), GxEPD_BLACK);
  display.drawRect(0, 0, (display.width()/2)+l_offset, display.height()/2, GxEPD_BLACK);
  display.drawRect(0, display.height()/2, (display.width()/2)+l_offset, display.height()/2, GxEPD_BLACK);
  // Measurements:
  display.setFont(&FreeSans9pt7b);
  display.setCursor(48, y_offset+25);
  display.print(temperature);
  display.setCursor(48, (display.height()/2)+y_offset+25);
  display.print(humidity);
  display.setCursor((display.width()/2)+l_offset-45, y_offset+15);
  display.print(mq_4_val);
  display.setCursor((display.width()/2)+l_offset-45, y_offset+35);
  display.print(mq_7_val);
  display.update();
  delay(10000);
  // If activated, clear the e-paper module.
  if(_clear){
    display.fillScreen(GxEPD_WHITE);
    display.update();
    delay(10000);
  }
}

void blePeripheralConnectHandler(BLEDevice central) {
  // Central connected event handler:
  Serial.print("\nConnected event, central: ");
  Serial.println(central.address());
  _connected = true;
}

void blePeripheralDisconnectHandler(BLEDevice central) {
  // Central disconnected event handler:
  Serial.print("\nDisconnected event, central: ");
  Serial.println(central.address());
  _connected = false;
}

void err_msg(){
  display.fillScreen(GxEPD_WHITE);
  display.setTextColor(GxEPD_BLACK);
  display.drawExampleBitmap(gImage_error, (display.width()-128)/2, 0, 128, 128, GxEPD_BLACK);
  display.update();
  adjustColor(255,0,0);
  delay(10000);
}

void adjustColor(int r, int g, int b){
  analogWrite(redPin, (255-r));
  analogWrite(greenPin, (255-g));
  analogWrite(bluePin, (255-b));
}

Credits

Kutluhan Aktar

Kutluhan Aktar

80 projects • 296 followers
AI & Full-Stack Developer | @EdgeImpulse | @Particle | Maker | Independent Researcher

Comments