bleprofile_GenerateADVData in central role

Anonymous · ‎May 08, 2015

Hi,

like in the hello_client example, i need to scan and advertise at the same time. So i call:

...

blecen_Create();

blecen_Scan(LOW_SCAN);

bleprofile_Discoverable(HIGH_UNDIRECTED_DISCOVERABLE, NULL);

That seems to work, i see the device advertising and scanning. But if i try to modify the advertising data with a call to the bleprofile_GenerateADVData, then something goes broken and the device does not advertise anymore.

Is it possible to change the advertising data while in central role?

Thank you.

Fabrizio

Anonymous · ‎May 10, 2015

In order to scan and advertise at the same time try using blecm_startAdv() and blecm_startScan() together, the stack will handle which one happens when.

// HCIULP Advertising

#define HCIULP_ADV_SCAN_IND 0x02

#define HCIULP_ADV_NONCONN_IND 0x03

#define HCIULP_ADV_CHANNEL_37 0x01

#define HCIULP_ADV_CHANNEL_38 0x02

#define HCIULP_ADV_CHANNEL_39 0x04

#define HCIULP_ADV_CHANNEL_MAP_MASK (HCIULP_ADV_CHANNEL_37 | HCIULP_ADV_CHANNEL_38 | HCIULP_ADV_CHANNEL_39)

#define HCIULP_ADV_FILTER_POLICY_WHITE_LIST_NOT_USED 0x00 // white list not used

#define HCIULP_ADV_FILTER_POLICY_WHITE_LIST_USED 0x01 // white list used

// advType: Type of advertisement. 0 : ADV_IND; 1 : ADV_DIRECT_IND; 2 : ADV_SCAN_IND; 3 : ADV_NONCONN_IND; others are invalid.

// adcInterval: Min and Max advertisement interval in BT slots. Min = 20mS; Max = 10.24s. Not valid for ADV_DIRECT_IND

// advChannel: Mask of channels to advertise (bitwise set to enable). 1 = Ch 37; 2 = Ch 38; 4 = Ch 39.

// advAdrType: Own address type. 0 : Public; 1 : Random device address; Others are reserved.

// advFilterPolicy: ADV filter policy. 0 : Allow scan and connect from any; 1 : Allow scan from whitelist, connect from any; 2 : Allow scan from any, connect from whitelist; 3 : Allow scan and connect from whitelist only.

// initiatorAdrType: Direct address type. 0 : Public; 1 : Random device address; Others are reserved.

// initiatorAdr: Address of the device to be connected when ADV_DIRECT_IND

//

// Start advertisements

blecm_startAdv(

HCIULP_ADV_SCAN_IND, // Non-connectable, scannable undirected advertisement

160, // Adv interval 160*0.625ms = 100ms

HCIULP_ADV_CHANNEL_MAP_MASK, // All channels

HCIULP_PUBLIC_ADDRESS, // int32 advAdrType,

HCIULP_ADV_FILTER_POLICY_WHITE_LIST_NOT_USED, // int32 advFilterPolicy,

HCIULP_PUBLIC_ADDRESS, // int32 initiatorAdrType,

NULL); // uint8* initiatorAdr

// scanType: Type of scan. 0 : HCIULP_PASSIVE_SCAN = No SCAN_REQ packets shall be sent; 1 : HCIULP_ACTIVE_SCAN = SCAN_REQ packets may be sent.

// scanInterval: Time interval from when the Controller started its last LE scan until it begins the subsequent LE scan.

// scanWindow: The duration of the LE scan.

// scanAdrType: Own address type. 0 : Public; 1 : Random device address; Others are reserved.

// scanFilterPolicy: Scan filter policy.

// filterDuplicates: Filter duplicates.

//

// Start scanning

blecm_startScan(

HCIULP_ACTIVE_SCAN, // Active scanning. SCAN_REQ packets may be sent.

96, // Scan interval 96*0.625ms = 60ms

48, // Scan duration 48*0.625ms = 30ms

HCIULP_PUBLIC_ADDRESS, // int32 scanAdrType

HCIULP_SCAN_FILTER_POLICY_WHITE_LIST_NOT_USED, // int32 scanFilterPolicy

HCIULP_SCAN_DUPLICATE_FILTER_ON); // int32 filterDuplicates

In order to modify your advertising data try bleprofile_notifyAdvPacketTransmissions(&update_adv_packet, 2500). This will register the function "update_adv_packet" to be called 2.5msec before and after and adv packet is sent. However in order to get his function to work you need to add "APP_PATCHES_AND_LIBS += additional_advertisement_control.a" to your makefile AND MAKE SURE YOU ARE USING SDK 2.2.1. There is a bug in SDK 2.2.0 that prevents bleprofile_notifyAdvPacketTransmissions from working. See the my_beacon example.

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Anonymous · ‎May 10, 2015