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@8:b816829fb712, 2014-12-03 (annotated)

Committer:
rgrover1
Date:
Wed Dec 03 14:48:28 2014 +0000
Revision:
8:b816829fb712
Parent:
7:6faec5978fb4 
config service remains avaialble for only 30 seconds.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rgrover1 0:790a27ffc99b 1 /* mbed Microcontroller Library
rgrover1 0:790a27ffc99b 2 * Copyright (c) 2006-2013 ARM Limited
rgrover1 0:790a27ffc99b 3 *
rgrover1 0:790a27ffc99b 4 * Licensed under the Apache License, Version 2.0 (the "License");
rgrover1 0:790a27ffc99b 5 * you may not use this file except in compliance with the License.
rgrover1 0:790a27ffc99b 6 * You may obtain a copy of the License at
rgrover1 0:790a27ffc99b 7 *
rgrover1 0:790a27ffc99b 8 * http://www.apache.org/licenses/LICENSE-2.0
rgrover1 0:790a27ffc99b 9 *
rgrover1 0:790a27ffc99b 10 * Unless required by applicable law or agreed to in writing, software
rgrover1 0:790a27ffc99b 11 * distributed under the License is distributed on an "AS IS" BASIS,
rgrover1 0:790a27ffc99b 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rgrover1 0:790a27ffc99b 13 * See the License for the specific language governing permissions and
rgrover1 0:790a27ffc99b 14 * limitations under the License.
rgrover1 0:790a27ffc99b 15 */
rgrover1 0:790a27ffc99b 16
rgrover1 0:790a27ffc99b 17 #include "mbed.h"
rgrover1 0:790a27ffc99b 18 #include "BLEDevice.h"
rgrover1 7:6faec5978fb4 19 #include "URIBeaconConfigService.h"
rgrover1 6:31b65d4ea67d 20 #include "DFUService.h"
rgrover1 6:31b65d4ea67d 21 #include "DeviceInformationService.h"
rgrover1 0:790a27ffc99b 22
rgrover1 0:790a27ffc99b 23 BLEDevice ble;
rgrover1 8:b816829fb712 24 URIBeaconConfigService *uriBeaconConfig;
rgrover1 0:790a27ffc99b 25
rgrover1 6:31b65d4ea67d 26 void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
rgrover1 6:31b65d4ea67d 27 {
rgrover1 6:31b65d4ea67d 28 ble.startAdvertising();
rgrover1 6:31b65d4ea67d 29 }
rgrover1 0:790a27ffc99b 30
rgrover1 8:b816829fb712 31 void switchCallback(void)
rgrover1 8:b816829fb712 32 {
rgrover1 8:b816829fb712 33 static bool switched = false;
rgrover1 8:b816829fb712 34 if (!switched) {
rgrover1 8:b816829fb712 35 printf("executing switch\r\n");
rgrover1 8:b816829fb712 36 delete uriBeaconConfig;
rgrover1 8:b816829fb712 37 uriBeaconConfig = NULL;
rgrover1 8:b816829fb712 38
rgrover1 8:b816829fb712 39 static const uint8_t BEACON_UUID[] = {0xD8, 0xFE};
rgrover1 8:b816829fb712 40 static const uint8_t urldata[] = {
rgrover1 8:b816829fb712 41 BEACON_UUID[0],
rgrover1 8:b816829fb712 42 BEACON_UUID[1],
rgrover1 8:b816829fb712 43 0x00, // flags
rgrover1 8:b816829fb712 44 0x20, // power
rgrover1 8:b816829fb712 45 0x00, // http://www.
rgrover1 8:b816829fb712 46 'm',
rgrover1 8:b816829fb712 47 'b',
rgrover1 8:b816829fb712 48 'e',
rgrover1 8:b816829fb712 49 'd',
rgrover1 8:b816829fb712 50 0x08, // .".org"
rgrover1 8:b816829fb712 51 };
rgrover1 8:b816829fb712 52
rgrover1 8:b816829fb712 53 ble.shutdown();
rgrover1 8:b816829fb712 54 ble.init();
rgrover1 8:b816829fb712 55
rgrover1 8:b816829fb712 56 ble.clearAdvertisingPayload();
rgrover1 8:b816829fb712 57 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, BEACON_UUID, sizeof(BEACON_UUID));
rgrover1 8:b816829fb712 58 ble.accumulateAdvertisingPayload(GapAdvertisingData::SERVICE_DATA, urldata, sizeof(urldata));
rgrover1 8:b816829fb712 59
rgrover1 8:b816829fb712 60 ble.setAdvertisingType(GapAdvertisingParams::ADV_NON_CONNECTABLE_UNDIRECTED);
rgrover1 8:b816829fb712 61 ble.setAdvertisingInterval(1600); /* 1s; in multiples of 0.625ms. */
rgrover1 8:b816829fb712 62 ble.startAdvertising();
rgrover1 8:b816829fb712 63
rgrover1 8:b816829fb712 64 switched = true;
rgrover1 8:b816829fb712 65 }
rgrover1 8:b816829fb712 66 }
rgrover1 8:b816829fb712 67
rgrover1 0:790a27ffc99b 68 int main(void)
rgrover1 0:790a27ffc99b 69 {
rgrover1 8:b816829fb712 70 Ticker ticker;
rgrover1 8:b816829fb712 71 ticker.attach(switchCallback, 30);
rgrover1 8:b816829fb712 72
rgrover1 0:790a27ffc99b 73 ble.init();
rgrover1 6:31b65d4ea67d 74 ble.onDisconnection(disconnectionCallback);
rgrover1 0:790a27ffc99b 75
rgrover1 8:b816829fb712 76 uriBeaconConfig = new URIBeaconConfigService(ble, "http://www.mbed.org");
rgrover1 8:b816829fb712 77 if (!uriBeaconConfig->configuredSuccessfully()) {
rgrover1 6:31b65d4ea67d 78 error("failed to accommodate URI");
rgrover1 6:31b65d4ea67d 79 }
rgrover1 7:6faec5978fb4 80 /* optional use of the API offered by URIBeaconConfigService */
rgrover1 7:6faec5978fb4 81 const int8_t powerLevels[] = {-20, -4, 0, 10};
rgrover1 8:b816829fb712 82 uriBeaconConfig->setTxPowerLevels(powerLevels);
rgrover1 8:b816829fb712 83 uriBeaconConfig->setTxPowerMode(URIBeaconConfigService::TX_POWER_MODE_LOW);
rgrover1 0:790a27ffc99b 84
rgrover1 6:31b65d4ea67d 85 /* Setup auxiliary services. */
rgrover1 6:31b65d4ea67d 86 DFUService dfu(ble); /* To allow over-the-air firmware udpates. optional. */
rgrover1 6:31b65d4ea67d 87 DeviceInformationService deviceInfo(ble, "ARM", "URIBeacon2", "SN1", "hw-rev1", "fw-rev1", "soft-rev1"); /* optional */
rgrover1 6:31b65d4ea67d 88
rgrover1 0:790a27ffc99b 89 ble.startAdvertising();
rgrover1 0:790a27ffc99b 90
rgrover1 0:790a27ffc99b 91 while (true) {
rgrover1 0:790a27ffc99b 92 ble.waitForEvent();
rgrover1 0:790a27ffc99b 93 }
rgrover1 0:790a27ffc99b 94 }