wifi-config-ble-server/index.js

var bleno = require('bleno');
var StringDecoder = require('string_decoder').StringDecoder;

var name = 'wifitest';
var serviceUuids = ['fffffffffffffffffffffffffffffff0']


function bytesToString(buffer) {
    return String.fromCharCode.apply(null, new Uint8Array(buffer));
}

bleno.on('stateChange', function (state) {
    console.log(state);
    bleno.startAdvertising(name, serviceUuids, function (error) {
        if (error) {
            console.log(error);
        }
        console.log('start');

        var Descriptor = bleno.Descriptor;

        var descriptor = new Descriptor({
            uuid: '2901',
            value: 'test' // static value, must be of type Buffer or string if set
        });
        var Characteristic = bleno.Characteristic;

        var characteristic = new Characteristic({
            uuid: 'fffffffffffffffffffffffffffffff1', // or 'fff1' for 16-bit
            properties: ['read', 'write', 'writeWithoutResponse'], // can be a combination of 'read', 'write', 'writeWithoutResponse', 'notify', 'indicate'
            value: null, // optional static value, must be of type Buffer - for read only characteristics

            descriptors: [
                // see Descriptor for data type
                descriptor
            ],
            onWriteRequest: function (data, offset, withoutResponse) {
                console.log(bytesToString(data));
            }
        });
        var PrimaryService = bleno.PrimaryService;

        var primaryService = new PrimaryService({
            uuid: 'fffffffffffffffffffffffffffffff0', // or 'fff0' for 16-bit
            characteristics: [
                // see Characteristic for data type
                characteristic
            ]
        });
        bleno.setServices(primaryService, function (error) {
            if (error) {
                console.log(error);
            }
            console.log('success');
        });
    });
});