Data throughput mesh

RE: Data throughput mesh

AndreasF — Mon, 21 Oct 2019 13:47:14 GMT

Hi.

But what about line 0x0002D682? Where is that?

Which file?

Best regards,

Andreas

RE: Data throughput mesh

marikalp — Mon, 21 Oct 2019 09:55:10 GMT

in the file light_switch_client_nrf52840_xxAA_s140_6.1.1.elf that are the lines 0x0002D681 e 0x0002D683:

DFFE svc #0xFE
78E7 ldrb r7, [r4, #3]

RE: Data throughput mesh

marikalp — Mon, 21 Oct 2019 09:42:30 GMT

<t: 0>, main.c, 328, ----- BLE Mesh Light Switch Client Demo -----
<t: 13073>, app_error_weak.c, 108, Mesh assert at 0x0002D682 (:0)

RE: Data throughput mesh

marikalp — Mon, 21 Oct 2019 09:18:51 GMT

I'm using segger embedded studio as IDE.

RE: Data throughput mesh

marikalp — Mon, 21 Oct 2019 09:15:09 GMT

where have i to add this code?

RE: Data throughput mesh

AndreasF — Mon, 21 Oct 2019 09:12:57 GMT

Hi.

You have to use the SoftDevice even though you're running BLE Mesh, as it handles the radio.

Can you please use the addr2line tool and find out where in the code you asserted?

addr2line -e filename.elf 0x0002D682

Best regards,

Andreas

RE: Data throughput mesh

marikalp — Mon, 21 Oct 2019 08:17:38 GMT

trying to flash before the s140 softdevice i had this error:

<t: 13105>, app_error_weak.c, 108, Mesh assert at 0x0002D682 (:0)

what do i schould do?

RE: Data throughput mesh

marikalp — Mon, 21 Oct 2019 07:23:55 GMT

hi..can I ask you if the problem could be I m using the nrf52840 board ,but for ble mesh I don't use the softdevice like for ble (s140) and ant (s340)..have i to flash it before to run my code?

Thanks a lot.

RE: Data throughput mesh

AndreasF — Wed, 16 Oct 2019 13:47:31 GMT

Hi.

Sorry if that was confusing.

What I mean is you said:

[quote user="marikalp"]all the changed states,[/quote]

So I understand you sample multiple GPIO's?

You can have 11byte per packet you send, so if you make sure that you send 11 bytes each time you send a message.

Best regards,

Andreas

RE: Data throughput mesh

marikalp — Wed, 16 Oct 2019 13:43:18 GMT

what does it mean buffer up? the scope is to understand which is the fastes frequency the server can receive. there is a limit on the server?

RE: Data throughput mesh

AndreasF — Wed, 16 Oct 2019 13:37:47 GMT

Hi.

Well, you can either try to buffer up some data if you want to keep that sample rate, or you have to lower the sample rate.

Anyway, I still think that aiming for 15ms latency is quite difficult.

Best regards,

Andreas

RE: Data throughput mesh

marikalp — Wed, 16 Oct 2019 11:12:07 GMT

yes i only interested in receiving all the changed states,and understand which is the max frequency...what should i do? thanks

RE: Data throughput mesh

AndreasF — Wed, 16 Oct 2019 10:51:57 GMT

Hi again.

Could I ask what you're trying to achieve here?

Are you interested in knowing the state right now?

Are you interested in receiving all the changed states?

It is not optimistical to expect BLE Mesh to run with a low and consistent latency, there will atleast be 15 ms per hop. And you are sampling each 5 ms?

I don't think you can achieve 5ms latency.

Best regards,

Andreas

RE: Data throughput mesh

marikalp — Wed, 16 Oct 2019 07:49:56 GMT

That is the gpio interrupt function i added in the client script in order to send every time the input changes to the server. As i said before client could change the input state with a very high frequency but the server doesn't follow it. I didn't change any thing in the server script...I only defined for the net 1 client e 1 server to increase the speed of recognition and then sending

RE: Data throughput mesh

marikalp — Wed, 16 Oct 2019 07:40:25 GMT

Actually I don't transimitt anything. I say better : I used the same send function in the client to have a message start from the client to the server. What before was made by the button now was obtained by a gpio interrupt:on both the edge resulting in the sending to the server. I m only interested in the interrupt and which is the fastest frequency the server can receive. I tested that client can send also 200 Hz but now the server could not receive 200 Hz packet.. Which is the problem?

RE: Data throughput mesh

AndreasF — Wed, 16 Oct 2019 07:13:19 GMT

Hi.

The throughput limit of BLE Mesh is 31 bytes per packet (11 byte payload), which is about 11.6 kbps p2p.

How much data are you transmitting?

Do you do any hopping with the data?

Best regards,

Andreas