Data Loss Issue with nRF52832 and nRF52833 Gateways [nRF52 SDK]

RE: Data Loss Issue with nRF52832 and nRF52833 Gateways [nRF52 SDK]

hmolesworth — Wed, 05 Jun 2024 12:14:46 GMT

Just on the off-chance, peripherals might have this ..

#define APP_ADV_DURATION 18000 /**< The advertising duration (180 seconds) in units of 10 milliseconds. */

RE: Data Loss Issue with nRF52832 and nRF52833 Gateways [nRF52 SDK]

Gavin — Wed, 05 Jun 2024 09:05:47 GMT

Hi Edvin,

[quote userid="26071" url="~/f/nordic-q-a/111798/data-loss-issue-with-nrf52832-and-nrf52833-gateways-nrf52-sdk/487282"]So that means that you are advertising and scanning? Or only scanning? If you are advertising at the same time, what is your advertising interval?[/quote]

scanning only

[quote userid="26071" url="~/f/nordic-q-a/111798/data-loss-issue-with-nrf52832-and-nrf52833-gateways-nrf52-sdk/487282"]Do you see any other events during the problem? How about right before or right after? Any particular events? (try printing out the default event IDs, in case there is an event that you do not check for in the event handler. [/quote]

I'll test it and let you know ASAP. Thanks

RE: Data Loss Issue with nRF52832 and nRF52833 Gateways [nRF52 SDK]

Edvin — Tue, 04 Jun 2024 11:00:32 GMT

[quote user="Gavin H"]Just BLE advertising, no connections, no other protocol running, only a gateway scanning and multiple tags broadcasting[/quote]

So that means that you are advertising and scanning? Or only scanning? If you are advertising at the same time, what is your advertising interval?

[quote user="Gavin H"]But when this happens, I can still get data with nRF Connect, which should mean the tags are broadcasting fine, right?[/quote]

Yes. If you see that the RSSI on nRF Connect is changing, it means that you are receiving advertisements live. Also, if you have multiple tags advertising, they probably don't all fail at the same time.

[quote user="Gavin H"]Also, on the chip, when there's a problem, the 'ble_evt_handler' callback function doesn't get any advertising events back[/quote]

Do you see any other events during the problem? How about right before or right after? Any particular events? (try printing out the default event IDs, in case there is an event that you do not check for in the event handler.

Are you able to replicate this on a DK as well? Or only on the custom HW?

Best regards,

Edvin

RE: Data Loss Issue with nRF52832 and nRF52833 Gateways [nRF52 SDK]

Gavin — Tue, 04 Jun 2024 10:01:48 GMT

Hi Edvin,

Sorry, I did't explain it well.

[quote userid="26071" url="~/f/nordic-q-a/111798/data-loss-issue-with-nrf52832-and-nrf52833-gateways-nrf52-sdk/487252"]Are you doing anything else at the time when you are seeing the dropouts? Advertising? In a BLE connection? Any other protocol running at the same time? [/quote]

Just BLE advertising, no connections, no other protocol running, only a gateway scanning and multiple tags broadcasting

[quote userid="26071" url="~/f/nordic-q-a/111798/data-loss-issue-with-nrf52832-and-nrf52833-gateways-nrf52-sdk/487252"]And do you see any logs from your gateway? Any errors being printed? And have you tested having two gateways in the same area? When one drops out, does the other still see advertisements? Or can you use nRF Connect for Mobile/iOS/Android to check if there are actually advertisements around at the time?[/quote]

Right now, I'm just testing with one gateway, so it's a one-to-many deal, not using multiple gateways to scan the same tags at the same time. I'll check that out later.

But when this happens, I can still get data with nRF Connect, which should mean the tags are broadcasting fine, right?

The gateway isn't showing any other errors.

I haven't tried using the DK board to scan and check the data yet, but I can keep testing.

Also, on the chip, when there's a problem, the 'ble_evt_handler' callback function doesn't get any advertising events back

RE: Data Loss Issue with nRF52832 and nRF52833 Gateways [nRF52 SDK]

Edvin — Tue, 04 Jun 2024 09:33:58 GMT

Hello,

Are you doing anything else at the time when you are seeing the dropouts? Advertising? In a BLE connection? Any other protocol running at the same time?

And do you see any logs from your gateway? Any errors being printed? And have you tested having two gateways in the same area? When one drops out, does the other still see advertisements? Or can you use nRF Connect for Mobile/iOS/Android to check if there are actually advertisements around at the time?

Best regards,

Edvin