DA14585 windows size and scan interval

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Last post
Wed, 2020-05-13 18:50
#1
ltdev
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DA14585 windows size and scan interval

Hi, in a project we want advertise 2 for seconds after that scan for 3 seconds. I implemented advertise and scan switch mechanism but i have some problemms. how can i set scan window and scan interval values? I want to scan beacons about 3 seconds?

I define that values

cmd->op.code = GAPM_SCAN_ACTIVE;
cmd->op.addr_src = GAPM_STATIC_ADDR;
cmd->interval = MS_TO_BLESLOTS(3000); // total interval 3000 ms
cmd->window = MS_TO_BLESLOTS(1000); // each channel 1000 ms
cmd->mode = GAP_GEN_DISCOVERY;
cmd->filt_policy = SCAN_ALLOW_ADV_ALL;
cmd->filter_duplic = SCAN_FILT_DUPLIC_EN;

但扫描时间大约需要7.94秒

scan completed status is 69 (GAP_ERR_TIMEOUT)

Device:
DA14585
Thu, 2020-05-14 09:39
PM_Dialog
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Hi btdev,

Hi btdev,

Please try to use GAPM_SCAN_PASSIVE instead of GAPM_SCAN_ACTIVE. In passive scanning configuration, the central receives only advertising data and doesn’t send a scan request (SCAN_REQ) in order to receive a scan response (SCAN_RESP) from the peripheral. Regarding the timeout, you should setup a second timer to stop the scanning procedure. Then, you should add another callback .app_on_scanning_completed = scanning_completed. In scanning_completed() you should reconfigure the device to Peripheral and restart advertising.

Thanks, PM_Dialog

Thu, 2020-05-14 09:50
ltdev
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Last seen:3 months 4 days ago
加入:2018-11-12 09:19
// Scan stop timer callback
// Scan stop timer callback void scanStopTimer_CB(void) { arch_printf( "SCAN STOP\r\n"); struct gapm_cancel_cmd *cmd =(struct gapm_cancel_cmd *) KE_MSG_ALLOC(GAPM_CANCEL_CMD, TASK_GAPM, TASK_APP, gapm_cancel_cmd); cmd->operation = GAPM_SCAN_PASSIVE; // Set GAPM_SCAN_PASSIVE ke_msg_send(cmd);// Send the message } // scan start function static void user_scan_start(void) { struct gapm_start_scan_cmd* cmd = KE_MSG_ALLOC(GAPM_START_SCAN_CMD, TASK_GAPM, TASK_APP, gapm_start_scan_cmd); cmd->op.code = GAPM_SCAN_PASSIVE; cmd->op.addr_src = GAPM_STATIC_ADDR; cmd->interval = 10; cmd->window = 5; cmd->mode = GAP_GEN_DISCOVERY; cmd->filt_policy = SCAN_ALLOW_ADV_ALL; cmd->filter_duplic = SCAN_FILT_DUPLIC_EN; // Send the message ke_msg_send(cmd); // We are now connectable //ke_state_set(TASK_APP, APP_CONNECTABLE); scanStopTimer = app_easy_timer(300,scanStopTimer_CB); arch_printf( "SCAN START\r\n"); } //.scan completed callback void user_on_scan_complete(const uint8_t param){ arch_printf( "Advertise Start = %d\r\n", param); // begin other process // }

Hi i add a timer. and scan completed callback (in user_callback.h) . In the running scan stop after 3 secs but don't print SCAN STOP printf and dont'run scan completed callback. Just stop application after 3secs

Thu, 2020-05-14 15:03
PM_Dialog
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加入:2018-02-08 11:03
Hi btdev,

Hi btdev,

你mentioned that as soon as the scanning procedure is completed, no callback function is triggered. Did you register your callback function in the .app_on_scanning_completed item of the user_app_callbacks sttacture in the user_callback_config.h file? When the scanning is stopped, where the code goes?

Thanks, PM_Dialog