nRF52840 BLE advertising issue

RE: nRF52840 BLE advertising issue

Jared — Thu, 10 Sep 2020 13:22:26 GMT

Hi,

Have you checked that the data has actually been collected by the nRF through UART? Could you try to increase number of re-transmits, and consider using reliable transfer so lost packets will be resent.

regards

Jared

RE: nRF52840 BLE advertising issue

ramachandra — Thu, 03 Sep 2020 06:16:15 GMT

Hi Jarad,

We have developed our own BLE application which interacts with the PIC micro-controller through UART Port. The micro-controller collect the data and send to the BLE chip which transmits it on the mesh so that the other similar device receive that data fro processing.

We are using Generic On OFF Client and Generic On OFF server model for transferring the data.

In Our mesh network we have multiple node say around 5 which is in star topology.

Regards,
Ram

RE: nRF52840 BLE advertising issue

Jared — Wed, 02 Sep 2020 13:57:49 GMT

Hi,

How does your mesh network look like? Is it many hops in the network between node 1 and node 2? Could you elaborate a bit more on your app, is it from a SDK example? What data do you send and which model are you using?

regards

Jared

RE: nRF52840 BLE advertising issue

ramachandra — Tue, 01 Sep 2020 05:50:48 GMT

Hi Jarad,

We are using the nRF52840 chip for application where it transfer the configuration data on the Mesh network to the other nodes.

We are able to configure the device as proxy node and transfer the information between the nodes when configured as both server and client model.

But the problem is the reliability of data reception is not consistent. ex if we try to transfer the data from node 1 around 10 times the node 2 will receive the data only 8 times and another 2 times data will be missed out.

Please let me know if you need any more information.

Regards,

Ram

RE: nRF52840 BLE advertising issue

Jared — Wed, 26 Aug 2020 13:57:38 GMT

Hi,

I'm still not sure whether this is related to a Mesh or Ble device. If it's indeed a Mesh device, are you having the issue before or after the node has been provisioned?

[quote userid="85943" url="~/f/nordic-q-a/64186/nrf52840-ble-advertising-issue/266081"]Could you please suggest the latest nRF52840 SDK and suitable proxy Mesh APP [/quote]

Our mesh app is called nRF Mesh, you can find it both in App store and Google Play.

best regards

Jared

RE: nRF52840 BLE advertising issue

ramachandra — Tue, 25 Aug 2020 04:07:34 GMT

Hi Jarad,

Could you please suggest the latest nRF52840 SDK and suitable proxy Mesh APP which can be used so that we can try it once and check it out if the problem still persist.

We need the proxy mesh app which support configuration of Generic On Off server and Generic On Off Client in the single Provisioning APP as shown below.

Reagrds,

Ram

RE: nRF52840 BLE advertising issue

Jared — Mon, 03 Aug 2020 09:48:59 GMT

Hi,

What debugger tool are you using? It's difficult to find the root cause without understanding what's happening. I'm interested in understanding what happens after a reset. Does the application assert? What exactly is preventing you from using debugger?

Also, are you saving anything to flash i.e using the peer manager or the fds module?

[quote user="ramachandra"][/quote]

SDK which we are using currently are:

1. nRF5_SDK_15.3.0_59ac34

2. nrf5_SDK_for_Mesh_v4.0.0_src

3. s140nrf52611

Are you using Mesh or the normal SDK?

regards

Jared

RE: nRF52840 BLE advertising issue

ramachandra — Mon, 03 Aug 2020 05:28:04 GMT

Hi Jared,

Thanks for supporting, Please find the details below.

Does a reset help?

No Reset didn't help us out, Even after Power Cycle the units doesn't come back to its original state, the Chip never advertise its name until we re-flash/reprogram the chip.

2. Have you checked that the application isn't asserting i.e in a error handler?

We have tried it out, but during the application running we were not able to extract the test logs from the chip using debugger. We will retry once again using different method, meanwhile please suggest if you have any method to access it.

3. Are you using a watchdog?

No we are not using Watchdog directly, instead the nRESET pin of nrf52840 is connected to the PIC microcontroller(Master) GPIO which intern can be used to control the reset of the chip

4.What SDK and Softdevice version are you using?

SDK which we are using currently are:

1. nRF5_SDK_15.3.0_59ac34

2. nrf5_SDK_for_Mesh_v4.0.0_src

3. s140nrf52611

RE: nRF52840 BLE advertising issue

Jared — Wed, 29 Jul 2020 12:54:23 GMT

Hi,

[quote user=""]This doesn’t happen every time but randomly it stops working and there is no way to discover the device. The only solution to make it to advertise its name is to program it again.[/quote]

Does a reset help?
Have you checked that the application isn't asserting i.e in a error handler?
Are you using a watchdog?
What SDK and Softdevice version are you using?

regards

Jared