#How to install Nodejs 0.12.0 stable for Raspberry Pi The problem is due to recent releases of Raspbian mis-identifying the ARM version so Node tries to build for V7 instead of V6. These two changes from this io.js thread sort it out.

#Download nodejs-0.12.0 for Raspberry Pi
wget https://s3-eu-west-1.amazonaws.com/conoroneill.net/wp-content/uploads/2015/02/node-v0.12.0-linux-arm-pi.tar.gz
tar -zxvf node-v0.12.0-linux-arm-pi.tar.gz
cd node-v0.12.0-linux-arm-pi
sudo cp -R * /usr/local/

#Nodejs Scan BLE [noble, library] Ref: https://github.com/sandeepmistry/noble ##Prerequisites ###Linux

• Kernel version 3.6 or above
• libbluetooth-dev ###Ubuntu/Debian/Raspbian sudo apt-get install bluetooth bluez libbluetooth-dev libudev-dev

##Install

    npm install noble

###Example

ตัวอย่างการ Scan BLE โดยใช้ Nodejs

var noble = require('noble');
noble.on('stateChange', function(state){
    console.log('state : '+state);
     if (state === 'poweredOn') {
      noble.startScanning([], true);
    } else {
      noble.stopScanning();
    }
});

noble.on('discover', function(peripheral) {
    console.log('on -> discover: ' + peripheral.advertisement.localName);
});

###Peripheral discovered

peripheral = {
  id: "<id>",
  address: "<BT address">, // Bluetooth Address of device, or 'unknown' if not known
  addressType: "<BT address type>", // Bluetooth Address type (public, random), or 'unknown' if not known
  connectable: <connectable>, // true or false, or undefined if not known
  advertisement: {
    localName: "<name>",
    txPowerLevel: <int>,
    serviceUuids: ["<service UUID>", ...],
    manufacturerData: <Buffer>,
    serviceData: [
        {
            uuid: "<service UUID>"
            data: <Buffer>
        },
        ...
    ]
  },
  rssi: <rssi>
};

noble.on('discover', callback(peripheral));

#Nodejs Advertising BLE [bleno, library] Ref: https://github.com/sandeepmistry/bleno ###Linux

• Kernel version 3.6 or above
• libbluetooth-dev
• bluetoothd disabled, if BlueZ 5.14 or later is installed
  • System V:
    • sudo service bluetooth stop (once)
    • update-rc.d bluetooth remove (persist on reboot)
  • systemd
    • systemctl stop bluetooth (once)
    • systemctl disable bluetooth (persist on reboot)

###Ubuntu/Debian/Raspbian

sudo apt-get install bluetooth bluez libbluetooth-dev libudev-dev

##Install

npm install bleno

###Example ตัวอย่างการปล่อยสัญญาณ iBeacon

var uuid = 'e2c56db5dffb48d2b060d0f5a71096e0';
var major = 0; // 0x0000 - 0xffff
var minor = 0; // 0x0000 - 0xffff
var measuredPower = -59; // -128 - 127

bleno.startAdvertisingIBeacon(uuid, major, minor, measuredPower[, callback(error)]);