mbed-os-examples / Mbed OS mbed-os-example-ble-PeriodicAdvertising

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Demo for periodic advertising. This requires two devices to run. Both devices run the same program. They attempt to find each other after which they adopt complementary roles. One sets up periodic advertising. The other attempts to scan and sync with the periodic advertising.

The role of the scanner device can also be performed by a BLE scanner on a smartphone. Connect to the advertiser. This will establish it as the advertiser. After you disconnect the device will begin periodic advertising. The canonical source for this example lives at https://github.com/ARMmbed/mbed-os-example-ble/tree/master/BLE_PeriodicAdvertising

Running the application

Requirements

Devices must support extended advertising and periodic advertising (Bluetooth version 5+).

The sample application can also be monitored by any BLE scanner on a smartphone.

If you don't have a scanner on your phone, please install:

Information about activity is printed over the serial connection - please have a client open. You may use:

Building instructions

Building instructions for all samples are in the https:github.com/ARMmbed/mbed-os-example-ble/blob/master/README.md.

source/pretty_printer.h@3:68c67fc9134e, 2019-08-15 (annotated)

Committer:
mbed_official
Date:
Thu Aug 15 17:02:13 2019 +0100
Revision:
3:68c67fc9134e
Parent:
0:c736663c1bcc 
Merge pull request #252 from donatieng/mbed_os_update



Update Master branch to use Mbed OS 5.13.1

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Commit copied from https://github.com/ARMmbed/mbed-os-example-ble

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:c736663c1bcc 1 /* mbed Microcontroller Library
mbed_official 0:c736663c1bcc 2 * Copyright (c) 2018 ARM Limited
mbed_official 0:c736663c1bcc 3 *
mbed_official 0:c736663c1bcc 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 0:c736663c1bcc 5 * you may not use this file except in compliance with the License.
mbed_official 0:c736663c1bcc 6 * You may obtain a copy of the License at
mbed_official 0:c736663c1bcc 7 *
mbed_official 0:c736663c1bcc 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 0:c736663c1bcc 9 *
mbed_official 0:c736663c1bcc 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 0:c736663c1bcc 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 0:c736663c1bcc 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 0:c736663c1bcc 13 * See the License for the specific language governing permissions and
mbed_official 0:c736663c1bcc 14 * limitations under the License.
mbed_official 0:c736663c1bcc 15 */
mbed_official 0:c736663c1bcc 16
mbed_official 0:c736663c1bcc 17 #include <mbed.h>
mbed_official 0:c736663c1bcc 18 #include "ble/BLE.h"
mbed_official 0:c736663c1bcc 19
mbed_official 0:c736663c1bcc 20 /* for seeding random number generator */
mbed_official 0:c736663c1bcc 21 static bool seeded = false;
mbed_official 0:c736663c1bcc 22
mbed_official 0:c736663c1bcc 23 inline void print_error(ble_error_t error, const char* msg)
mbed_official 0:c736663c1bcc 24 {
mbed_official 0:c736663c1bcc 25 printf("%s: ", msg);
mbed_official 0:c736663c1bcc 26 switch(error) {
mbed_official 0:c736663c1bcc 27 case BLE_ERROR_NONE:
mbed_official 0:c736663c1bcc 28 printf("BLE_ERROR_NONE: No error");
mbed_official 0:c736663c1bcc 29 break;
mbed_official 0:c736663c1bcc 30 case BLE_ERROR_BUFFER_OVERFLOW:
mbed_official 0:c736663c1bcc 31 printf("BLE_ERROR_BUFFER_OVERFLOW: The requested action would cause a buffer overflow and has been aborted");
mbed_official 0:c736663c1bcc 32 break;
mbed_official 0:c736663c1bcc 33 case BLE_ERROR_NOT_IMPLEMENTED:
mbed_official 0:c736663c1bcc 34 printf("BLE_ERROR_NOT_IMPLEMENTED: Requested a feature that isn't yet implement or isn't supported by the target HW");
mbed_official 0:c736663c1bcc 35 break;
mbed_official 0:c736663c1bcc 36 case BLE_ERROR_PARAM_OUT_OF_RANGE:
mbed_official 0:c736663c1bcc 37 printf("BLE_ERROR_PARAM_OUT_OF_RANGE: One of the supplied parameters is outside the valid range");
mbed_official 0:c736663c1bcc 38 break;
mbed_official 0:c736663c1bcc 39 case BLE_ERROR_INVALID_PARAM:
mbed_official 0:c736663c1bcc 40 printf("BLE_ERROR_INVALID_PARAM: One of the supplied parameters is invalid");
mbed_official 0:c736663c1bcc 41 break;
mbed_official 0:c736663c1bcc 42 case BLE_STACK_BUSY:
mbed_official 0:c736663c1bcc 43 printf("BLE_STACK_BUSY: The stack is busy");
mbed_official 0:c736663c1bcc 44 break;
mbed_official 0:c736663c1bcc 45 case BLE_ERROR_INVALID_STATE:
mbed_official 0:c736663c1bcc 46 printf("BLE_ERROR_INVALID_STATE: Invalid state");
mbed_official 0:c736663c1bcc 47 break;
mbed_official 0:c736663c1bcc 48 case BLE_ERROR_NO_MEM:
mbed_official 0:c736663c1bcc 49 printf("BLE_ERROR_NO_MEM: Out of Memory");
mbed_official 0:c736663c1bcc 50 break;
mbed_official 0:c736663c1bcc 51 case BLE_ERROR_OPERATION_NOT_PERMITTED:
mbed_official 0:c736663c1bcc 52 printf("BLE_ERROR_OPERATION_NOT_PERMITTED");
mbed_official 0:c736663c1bcc 53 break;
mbed_official 0:c736663c1bcc 54 case BLE_ERROR_INITIALIZATION_INCOMPLETE:
mbed_official 0:c736663c1bcc 55 printf("BLE_ERROR_INITIALIZATION_INCOMPLETE");
mbed_official 0:c736663c1bcc 56 break;
mbed_official 0:c736663c1bcc 57 case BLE_ERROR_ALREADY_INITIALIZED:
mbed_official 0:c736663c1bcc 58 printf("BLE_ERROR_ALREADY_INITIALIZED");
mbed_official 0:c736663c1bcc 59 break;
mbed_official 0:c736663c1bcc 60 case BLE_ERROR_UNSPECIFIED:
mbed_official 0:c736663c1bcc 61 printf("BLE_ERROR_UNSPECIFIED: Unknown error");
mbed_official 0:c736663c1bcc 62 break;
mbed_official 0:c736663c1bcc 63 case BLE_ERROR_INTERNAL_STACK_FAILURE:
mbed_official 0:c736663c1bcc 64 printf("BLE_ERROR_INTERNAL_STACK_FAILURE: internal stack faillure");
mbed_official 0:c736663c1bcc 65 break;
mbed_official 0:c736663c1bcc 66 }
mbed_official 0:c736663c1bcc 67 printf("\r\n");
mbed_official 0:c736663c1bcc 68 }
mbed_official 0:c736663c1bcc 69
mbed_official 0:c736663c1bcc 70 /** print device address to the terminal */
mbed_official 0:c736663c1bcc 71 inline void print_address(const uint8_t *addr)
mbed_official 0:c736663c1bcc 72 {
mbed_official 0:c736663c1bcc 73 printf("%02x:%02x:%02x:%02x:%02x:%02x\r\n",
mbed_official 0:c736663c1bcc 74 addr[5], addr[4], addr[3], addr[2], addr[1], addr[0]);
mbed_official 0:c736663c1bcc 75 }
mbed_official 0:c736663c1bcc 76
mbed_official 0:c736663c1bcc 77 inline void print_mac_address()
mbed_official 0:c736663c1bcc 78 {
mbed_official 0:c736663c1bcc 79 /* Print out device MAC address to the console*/
mbed_official 0:c736663c1bcc 80 Gap::AddressType_t addr_type;
mbed_official 0:c736663c1bcc 81 Gap::Address_t address;
mbed_official 0:c736663c1bcc 82 BLE::Instance().gap().getAddress(&addr_type, address);
mbed_official 0:c736663c1bcc 83 printf("DEVICE MAC ADDRESS: ");
mbed_official 0:c736663c1bcc 84 print_address(address);
mbed_official 0:c736663c1bcc 85
mbed_official 0:c736663c1bcc 86 if (!seeded) {
mbed_official 0:c736663c1bcc 87 seeded = true;
mbed_official 0:c736663c1bcc 88 /* use the address as a seed */
mbed_official 0:c736663c1bcc 89 uint8_t* random_data = address;
mbed_official 0:c736663c1bcc 90 srand(*((unsigned int*)random_data));
mbed_official 0:c736663c1bcc 91 }
mbed_official 0:c736663c1bcc 92 }
mbed_official 0:c736663c1bcc 93
mbed_official 0:c736663c1bcc 94 inline const char* phy_to_string(Gap::Phy_t phy) {
mbed_official 0:c736663c1bcc 95 switch(phy.value()) {
mbed_official 0:c736663c1bcc 96 case Gap::Phy_t::LE_1M:
mbed_official 0:c736663c1bcc 97 return "LE 1M";
mbed_official 0:c736663c1bcc 98 case Gap::Phy_t::LE_2M:
mbed_official 0:c736663c1bcc 99 return "LE 2M";
mbed_official 0:c736663c1bcc 100 case Gap::Phy_t::LE_CODED:
mbed_official 0:c736663c1bcc 101 return "LE coded";
mbed_official 0:c736663c1bcc 102 default:
mbed_official 0:c736663c1bcc 103 return "invalid PHY";
mbed_official 0:c736663c1bcc 104 }
mbed_official 0:c736663c1bcc 105 }