Synchronization#

Synchronization.

Modules#

sl_bt_evt_sync_opened Indicates that a periodic advertising synchronization has been opened.

sl_bt_evt_sync_data Reports a received periodic advertisement packet.

sl_bt_evt_sync_closed Indicates that periodic advertising synchronization was lost or a synchronization establishment procedure was canceled.

Enumerations#

enum | sl_bt_sync_advertiser_clock_accuracy_t { sl_bt_sync_clock_accuracy_500 = 0x1f4, sl_bt_sync_clock_accuracy_250 = 0xfa, sl_bt_sync_clock_accuracy_150 = 0x96, sl_bt_sync_clock_accuracy_100 = 0x64, sl_bt_sync_clock_accuracy_75 = 0x4b, sl_bt_sync_clock_accuracy_50 = 0x32, sl_bt_sync_clock_accuracy_30 = 0x1e, sl_bt_sync_clock_accuracy_20 = 0x14 } | These values indicate the advertiser clock accuracy in a periodic advertising synchronization.

Functions#

sl_status_t | sl_bt_sync_set_parameters (uint16_t skip, uint16_t timeout, uint32_t flags)

sl_status_t | sl_bt_sync_open (bd_addr address, uint8_t address_type, uint8_t adv_sid, uint16_t *sync)

sl_status_t | sl_bt_sync_close (uint16_t sync)

Detailed Description#

Synchronization.

Provides periodic advertising synchronization feature.

Enumeration Type Documentation#

◆ sl_bt_sync_advertiser_clock_accuracy_t#

enum sl_bt_sync_advertiser_clock_accuracy_t#

These values indicate the advertiser clock accuracy in a periodic advertising synchronization.

Enumerator#

sl_bt_sync_clock_accuracy_500 |

(0x1f4) Clock accuracy 500 ppm

sl_bt_sync_clock_accuracy_250 |

(0xfa) Clock accuracy 250 ppm

sl_bt_sync_clock_accuracy_150 |

(0x96) Clock accuracy 150 ppm

sl_bt_sync_clock_accuracy_100 |

(0x64) Clock accuracy 100 ppm

sl_bt_sync_clock_accuracy_75 |

(0x4b) Clock accuracy 75 ppm

sl_bt_sync_clock_accuracy_50 |

(0x32) Clock accuracy 50 ppm

sl_bt_sync_clock_accuracy_30 |

(0x1e) Clock accuracy 30 ppm

sl_bt_sync_clock_accuracy_20 |

(0x14) Clock accuracy 20 ppm

Function Documentation#

◆ sl_bt_sync_set_parameters()#

sl_status_t sl_bt_sync_set_parameters

(

uint16_t

skip,

uint16_t

timeout,

uint32_t

flags

)

Configure periodic advertiser synchronization parameters. The specified parameters take effect immediately for all advertisers that have not already established synchronization.

The application should determine skip and timeout values based on the periodic advertising interval provided by the advertiser. It is recommended to use a long enough timeout that allows multiple receives. If skip and timeout are used, select appropriate values so that they allow a few receiving attempts. Periodic advertising intervals are reported in event sl_bt_evt_scanner_scan_report.

Parameters

 [in]| `skip`| The maximum number of periodic advertising packets that can be skipped after a successful receive.

  • Range: 0x0000 to 0x01F3

  • Default value: 0

---|---|--- [in]| timeout| The maximum permitted time between successful receives. If this time is exceeded, synchronization is lost. Unit: 10 ms.

  • Range: 0x0A to 0x4000

  • Unit: 10 ms

  • Time range: 100 ms to 163.84 s

  • Default value: 1000 ms

[in]| flags| No flags defined currently

Returns

SL_STATUS_OK if successful. Error code otherwise.

◆ sl_bt_sync_open()#

sl_status_t sl_bt_sync_open

(

bd_addr

address,

uint8_t

address_type,

uint8_t

adv_sid,

uint16_t *

sync

)

Start establishing synchronization with the specified periodic advertiser in parallel with other advertisers given in previous invocations of this command. The stack will internally enable scanning when needed so that synchronizations can occur. The scanning responses from the internal scanning are not passed to the application unless the application has also enabled scanning.

Advertisers that have not already synced before the invocation of this command will be synced using the skip and timeout values configured in the most recent invocation of command sl_bt_evt_scanner_scan_report.

Parameters

 [in]| `address`| Address of the advertiser

---|---|--- [in]| address_type| Advertiser address type. Values:

  • 0: Public address

  • 1: Random address

[in]| adv_sid| Advertising set identifier [out]| sync| A handle that will be assigned to the periodic advertising synchronization after the synchronization is established. This handle is valid only if the result code of this response is SL_STATUS_OK.

Returns

SL_STATUS_OK if successful. Error code otherwise.

Events

  • sl_bt_evt_sync_opened - Triggered after the synchronization is established.

  • sl_bt_evt_sync_data - Indicates that a periodic advertisement packet is received.

  • sl_bt_evt_sync_closed - Triggered after periodic advertising synchronization was lost or explicitly closed, or a synchronization establishment procedure was canceled.

◆ sl_bt_sync_close()#

sl_status_t sl_bt_sync_close | ( | uint16_t | sync| ) | ---|---|---|---|---|---

Closes a periodic advertising synchronization or cancels an ongoing attempt of establishing a synchronization.

Parameters

 [in]| `sync`| Periodic advertising synchronization handle

---|---|---

Returns

SL_STATUS_OK if successful. Error code otherwise.

Events

  • sl_bt_evt_sync_closed - Triggered after a periodic advertising synchronization has been closed or canceled.