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Bluetooth Low Energy LED control with LinkIt 7697

This tutorial will show you how to use App Inventor to control LED of LinkIt 7697 (Arduino compatible) button and Google Speech.

IntermediateFull instructions provided2 hours499
Bluetooth Low Energy LED control with LinkIt 7697

Things used in this project

Hardware components

LinkIt 7697
MediaTek Labs LinkIt 7697
×1
RGB LED (common cathode)
×1

Software apps and online services

Arduino IDE
Arduino IDE

Story

Read more

Schematics

circuit

Code

app inventor code

Java
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linkit 7697 code

Arduino
/*
  This example configures LinkIt 7697 to act as a simple GATT server with 1 characteristic.

  To use it, open AppInventor project:



  Build & install it on Android id

  created Mar 2017
*/
#include <LBLE.h>
#include <LBLEPeriphral.h>

// Define a simple GATT service with only 1 characteristic
LBLEService ledService("19B10010-E8F2-537E-4F6C-D104768A1214");
LBLECharacteristicInt switchCharacteristic("19B10011-E8F2-537E-4F6C-D104768A1214", LBLE_READ | LBLE_WRITE);

void setup() {

  // Initialize LED pin
  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, LOW);

  //Initialize serial and wait for port to open:
  Serial.begin(9600);

  // to check if USR button is pressed
  pinMode(6, INPUT);

  // Initialize BLE subsystem
  LBLE.begin();
  while (!LBLE.ready()) {
    delay(100);
  }
  Serial.println("BLE ready");

  Serial.print("Device Address = [");
  Serial.print(LBLE.getDeviceAddress());
  Serial.println("]");

  // configure our advertisement data.
  // In this case, we simply create an advertisement that represents an
  // connectable device with a device name
  LBLEAdvertisementData advertisement;
  advertisement.configAsConnectableDevice("BLE LED");

  // Configure our device's Generic Access Profile's device name
  // Ususally this is the same as the name in the advertisement data.
  LBLEPeripheral.setName("BLE LED");

  // Add characteristics into ledService
  ledService.addAttribute(switchCharacteristic);

  // Add service to GATT server (peripheral)
  LBLEPeripheral.addService(ledService);

  // start the GATT server - it is now
  // available to connect
  LBLEPeripheral.begin();

  // start advertisment
  LBLEPeripheral.advertise(advertisement);
}

void loop() {
  delay(1000);

  Serial.print("conected=");
  Serial.println(LBLEPeripheral.connected());

  if (digitalRead(6))
  {
    Serial.println("disconnect all!");
    LBLEPeripheral.disconnectAll();
  }

  if (switchCharacteristic.isWritten()) {
    const char value = switchCharacteristic.getValue();
    switch (value) {
      case 1:
        digitalWrite(LED_BUILTIN, HIGH);
        break;
      case 0:
        digitalWrite(LED_BUILTIN, LOW);
        break;
      default:
        Serial.println("Unknown value written");
        break;
    }
  }


}

Credits

CAVEDU Education

CAVEDU Education

11 projects • 11 followers
We provide tutorials of robotics, Arduino, Raspberry Pi and IoT topics. http://www.cavedu.com

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