Permanent scan on a gateway

RE: Permanent scan on a gateway

awneil — Tue, 17 Sep 2019 10:59:50 GMT

IF you don't want a timeout, check the documentation to see if there is an option for 'No timeout' ...

RE: Permanent scan on a gateway

awneil — Tue, 17 Sep 2019 10:51:58 GMT

It's the only way to see advertising.

But, in many cases, it may not matter if you miss some advertisements.

Again, it all depends on the specific requirements of your particular application.

RE: Permanent scan on a gateway

Aurele — Tue, 17 Sep 2019 10:48:57 GMT

ok, thank you for the information. So i guess when i get a timeout and i need to restart the scan, there is a short period of time during which i can lose some advertising packets ...

RE: Permanent scan on a gateway

Aurele — Tue, 17 Sep 2019 10:47:41 GMT

Indeed, the gateway will get the main power.

At first sight, when i started using BLE with nordic, i thought that scanning was a short phase during which a connection will be established. But now, since i know that data can be transmited with the advertising packets, i guess i need to set my gateway in permanent scan. i just wanted to know it was the good approach and if it was someting currently used.

RE: Permanent scan on a gateway

awneil — Tue, 17 Sep 2019 09:54:10 GMT

[quote userid="55583" url="~/f/nordic-q-a/52237/permanent-scan-on-a-gateway"]I know scanning is consuming a lot[/quote]

Normally, a "gateway" would be expected to have mains power ?

Clearly, if your device is not scanning, then it will not be seeing any advertising!

Only you can say whether that's a problem for your particular application!

RE: Permanent scan on a gateway

Jimmy@zone — Tue, 17 Sep 2019 09:51:36 GMT

What I know it always times out if you do not reset the timeout time e.g reset the permit_duration before it expires

RE: Permanent scan on a gateway

Aurele — Tue, 17 Sep 2019 09:42:58 GMT

what do you mean by "reschedule it" ?

I just want to know if permanent scan is a good approach when i want to use advertising packet to transmit data.

RE: Permanent scan on a gateway

Jimmy@zone — Tue, 17 Sep 2019 09:24:05 GMT

You can reschedule it

zb_void_t join_finished(zb_uint8_t param)
{
    UNUSED_PARAMETER(param);
    LOG("Join finished\n", NULL);
    // restart join, if you do this 10 sec before it ends it will renew the time.
}


// Start.....
    LOG("Network permit_joining started %d\n", cmd->time);
    zb_nlme_permit_joining_request_t b;
    b.permit_duration = cmd->time; // Setting this to 0x00 disables join. 0x01-0xFE is valid values and reprecents s. 0xFF is used for som special join....
    ZB_SET_BUF_PARAM(ZB_BUF_FROM_REF(param), b, zb_nlme_permit_joining_request_t);
    zb_err_code = ZB_SCHEDULE_CALLBACK(zb_nlme_permit_joining_request, param);
    ZB_ERROR_CHECK(zb_err_code);

    ZB_SCHEDULE_ALARM_CANCEL(join_finished, ZB_ALARM_ALL_CB);
    zb_err_code = ZB_SCHEDULE_ALARM(join_finished, 0, ZB_TIME_ONE_SECOND * b.permit_duration);
    ZB_ERROR_CHECK(zb_err_code);