change phy in mesh

RE: change phy in mesh

bivay — Sat, 30 May 2020 06:55:05 GMT

please support if in this case

RE: change phy in mesh

Sean Taylor — Mon, 30 Mar 2020 23:52:28 GMT

I tested these edits on Mesh V4.0.0 today and they appear to result in an increase in range - and - nice surprise - very little degradation to throughput / message roundtrip latency.

RE: change phy in mesh

inv4 — Sat, 22 Feb 2020 01:10:05 GMT

Hi, is this method still working on Mesh v4?, Im not getting good results, I get like 3 or 4 meters with 1 wall, with zigbee i was getting like 12 meters with 2 or 3 walls.

RE: change phy in mesh

Jeff Seaman — Fri, 26 Jul 2019 16:37:37 GMT

I just ran the test this morning. The patch provided above is working on the SDKforMeh3.10.

With the Rigado units I was able to Achieve 560 feet on the Long Range as compared to 266 feet with the 1MBIT PHY. What is disappointing is I got 560 Feet using the 1MBIT PHY on the Nordic Dev kits. I did find a Par of the nRF52840-PREVIEW-DK that worked on Long Range and got 700 feet. I think there is some local interference from the terrain as I should have gotten about 1000 feet.

On the whole I am disappointed in the performance of the meandering antenna. Any Ideas for a better antenna design that a monopole like on the Nordic Dev kits I am space constrained of course make the antenna smaller and get more range.

RE: change phy in mesh

matsublox — Tue, 18 Jun 2019 19:06:34 GMT

Please keep me updated on your progress. We intend to test this ourself but i do not know when yet.

RE: change phy in mesh

klau — Tue, 18 Jun 2019 05:21:44 GMT

I have troubling running the code after making this change. I wasn't able to receive any "mesh complete tx" message after making this change. I've tried increasing the wait time, didn't work either. Has anyone come across similar problems and know how to solve it?

RE: change phy in mesh

Jeff Seaman — Wed, 12 Jun 2019 13:13:33 GMT

One of the problem I had testing long range was that my nRF52840 dev kits have a revision AA chip. I have since acquired 3 Rigado bmd-340 dev kits with the newer chips they are functional using the sdk15.2_mod example. Still looking at how this will work with regular BLE before trying the mesh

RE: change phy in mesh

matsublox — Wed, 12 Jun 2019 08:02:02 GMT

Hi Jeff,

Are you using the latst version of the SDKs to do this an used Hung's method as decribed earlier in this thread?

Mats

RE: change phy in mesh

Jeff Seaman — Fri, 07 Jun 2019 19:02:14 GMT

I am testing Long Range now with the intent of integrating into the mesh,. So far I have had nothing other then the Throughput test used by Nordic for range testing do anything with the long range. I saw a drop in throughput but have not tested the range yet.

RE: change phy in mesh

Felixx — Fri, 31 May 2019 13:07:14 GMT

Great job @Hung Bui! Works as expected. + 5-10m through concrete and glass. We were testing on nrf52840 DK and nrf52840 dongles, nrf5SDKforMeshv310.

Unfortunately for relays we are pushed to use Zephyr to support friend feature and Zephyr is not relaying messages. Maybe you have ideas in which direction we should dig in to apply same on Zephyr relays?

RE: change phy in mesh

matsublox — Wed, 29 May 2019 04:22:51 GMT

I know that the mesh spec does not support Bluetooth 5 but the question was If anyone testet the ”trick” above to enable coded PHY over Mesh in the latest version of the Mesh SD! We are interested to see what cab be achieved in future long range mesh.

RE: change phy in mesh

Igor — Tue, 21 May 2019 09:23:42 GMT

The latest Mesh SDK version is 3.1.
AFAIK the official Mesh specs still do NOT support Bluetooth 5.

RE: change phy in mesh

matsublox — Tue, 21 May 2019 07:57:12 GMT

Been a while since i visited this topic. Any news? Done any test on newer versions of the Mesh SDK?

RE: change phy in mesh

matsublox — Fri, 16 Mar 2018 12:31:14 GMT

Hi Jeff,

Curious if you done any more on this and if you are using this with latest Softdevices from Nordic. We are trying BLE Mesh for a smart city application. Still not fully sure if we need coded phy but it will give the extra margin that we might need ...

Mats

RE: change phy in mesh

Jeff Seaman — Fri, 26 Jan 2018 12:40:36 GMT

Yes there is a great difference in the range. and more importantly to me it get through the local interference inside. I tested the range on our production floor. But I have not done any real range testing due to the weather here.

RE: change phy in mesh

matsublox — Fri, 26 Jan 2018 07:42:55 GMT

Hi Jeff,

@Jeff We are about to test this as well. Any more result available on your testing? Did you see a real improvement in range?

RE: change phy in mesh

Jeff Seaman — Fri, 22 Dec 2017 19:55:20 GMT

Sorry for the delay I thought I posted last week the patch provided worked for me.

RE: change phy in mesh

Jeff Seaman — Mon, 18 Dec 2017 14:33:15 GMT

I got back to the MESH today. I have tested inside on our production floor with good results. I still need to do outdoor range testing. Hopefully this afternoon.

RE: change phy in mesh

Jeff Seaman — Wed, 13 Dec 2017 12:42:09 GMT

I got pulled of the mesh to work on another job. I am wanting to try the mods as soon as I can get back to them.

RE: change phy in mesh

David Edwin — Wed, 13 Dec 2017 08:28:44 GMT

@matsublox , @jeff you can see the code changes as suggested by Hung Bui and see if it works for you.

RE: change phy in mesh

matsublox — Tue, 12 Dec 2017 15:33:33 GMT

@jeff Any news on this?

RE: change phy in mesh

Hung Bui — Tue, 12 Dec 2017 11:58:15 GMT

The following modification worked for me:

In advertise.c, set_default_broadcast_configuration() change radio_mode to use RADIO_MODE_NRF_62K5BIT instead of RADIO_MODE_BLE_1MBIT.
In scanner.c, scanner_config_reset() change scanner_config_radio_mode_set() to use RADIO_MODE_NRF_62K5BIT instead of RADIO_MODE_BLE_1MBIT.

In radio_config.c, radio_config_config() add the following code at the end:

 if (p_config->radio_mode==RADIO_MODE_NRF_62K5BIT )

 {
  NRF_RADIO->PCNF0 |=(
 
                 ((RADIO_PCNF0_PLEN_LongRange << RADIO_PCNF0_PLEN_Pos) & RADIO_PCNF0_PLEN_Msk) |
                 ((2 << RADIO_PCNF0_CILEN_Pos) & RADIO_PCNF0_CILEN_Msk) |
                 ((3 << RADIO_PCNF0_TERMLEN_Pos) & RADIO_PCNF0_TERMLEN_Msk) );
        
 }

4.In broadcast.c, time_required_to_send_us() add:

    if (radio_mode == RADIO_MODE_NRF_62K5BIT)
    {
        packet_length_in_bytes += RADIO_PREAMBLE_LENGTH_LR_EXTRA_BYTES;
    }

And define RADIO_PREAMBLE_LENGTH_LR_EXTRA_BYTES = 9.

Change 5th element in radio_mode_to_us_per_byte[] from 128 to 64.

Let us know if you don't achieve longer range with this patch.

RE: change phy in mesh

David Edwin — Fri, 08 Dec 2017 09:14:11 GMT

I have requested that when the radio mode is set to a different radio mode, the timing should also be updated. This makes it easy to support whichever mode is needed, the timing to compute for coded PHY is a bit of work and it is more appropriate to do this automatically. No time commitments on this yet.

RE: change phy in mesh

David Edwin — Thu, 07 Dec 2017 12:40:27 GMT

RE: change phy in mesh

matsublox — Thu, 07 Dec 2017 09:24:50 GMT

@jeff Any chance to look further into this? Was there a timing issue?