Bluetooth Low Energy / Mbed 2 deprecated BLE_PhysicalWeb

https://github.com/google/physical-web

Dependencies:   BLE_API mbed nRF51822

PhysicalWeb is the general concept of connecting physical devices to the web via BLE.

The core of the PhysicalWeb concept is based around the URI Beacon service. A URI Beacon is an unencrypted broadcast of a Universal Resource Indicator (URI), most commonly in the form of web links. This example is a more advanced form of the UriBeacon Example.

The PhysicalWeb concept is currently being championed by Google so the majority of the documentation is based around the [ https://github.com/google/physical-web | Google PhysicalWeb Github] page.

Here's an introduction to the concept.

There's an Android App to go with it.

As mentioned above, the UriBeacon Service is key to the implementation of PhysicalWeb. The UriBeacon documentation is based out of the Google UriBeacon Github page

main.cpp

Committer:
rgrover1
Date:
2014-12-12
Revision:
9:2b3091959218
Parent:
8:b816829fb712

File content as of revision 9:2b3091959218:

/* mbed Microcontroller Library
 * Copyright (c) 2006-2013 ARM Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "mbed.h"
#include "BLEDevice.h"
#include "URIBeaconConfigService.h"
#include "DFUService.h"
#include "DeviceInformationService.h"

BLEDevice ble;
URIBeaconConfigService *uriBeaconConfig;

void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
{
    ble.startAdvertising();
}

void switchCallback(void)
{
    static bool switched = false;
    if (!switched) {
        printf("executing switch\r\n");
        delete uriBeaconConfig;
        uriBeaconConfig = NULL;

        static const uint8_t BEACON_UUID[] = {0xD8, 0xFE};
        static const uint8_t urldata[] = {
            BEACON_UUID[0],
            BEACON_UUID[1],
            0x00, // flags
            0x20, // power
            0x00, // http://www.
            'm',
            'b',
            'e',
            'd',
            0x08, // .".org"
        };

        ble.shutdown();
        ble.init();

        ble.clearAdvertisingPayload();
        ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, BEACON_UUID, sizeof(BEACON_UUID));
        ble.accumulateAdvertisingPayload(GapAdvertisingData::SERVICE_DATA, urldata, sizeof(urldata));

        ble.setAdvertisingType(GapAdvertisingParams::ADV_NON_CONNECTABLE_UNDIRECTED);
        ble.setAdvertisingInterval(1600); /* 1s; in multiples of 0.625ms. */
        ble.startAdvertising();

        switched = true;
    }
}

int main(void)
{
    Ticker ticker;
    ticker.attach(switchCallback, 30);

    ble.init();
    ble.onDisconnection(disconnectionCallback);

    uriBeaconConfig = new URIBeaconConfigService(ble, "http://www.mbed.org");
    if (!uriBeaconConfig->configuredSuccessfully()) {
        error("failed to accommodate URI");
    }
    /* optional use of the API offered by URIBeaconConfigService */
    const int8_t powerLevels[] = {-20, -4, 0, 10};
    uriBeaconConfig->setTxPowerLevels(powerLevels);
    uriBeaconConfig->setTxPowerMode(URIBeaconConfigService::TX_POWER_MODE_LOW);

    /* Setup auxiliary services. */
    DFUService dfu(ble); /* To allow over-the-air firmware udpates. optional. */
    DeviceInformationService deviceInfo(ble, "ARM", "URIBeacon2", "SN1", "hw-rev1", "fw-rev1", "soft-rev1"); /* optional */

    ble.startAdvertising();

    while (true) {
        ble.waitForEvent();
    }
}