external antenna

Discussions about RaZberry - Z-Wave board for Raspberry computer
ssvenn
Posts: 7
Joined: 01 Aug 2020 12:35

Re: external antenna

Post by ssvenn »

What a huge difference an external antenna made!

Finally my razberry has a direct signal to all nodes, the only ones missing from my setup now are the ones that need to be reincluded because the original interviews failed. I think the next version of the razberry should have a version with some official big external antenna. I think a lot of the difference might just be getting some more distance from the noisy main raspberry pi board.
Screenshot 2021-04-13 at 21.36.47.png
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Screenshot 2021-04-13 at 21.37.17.png
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PoltoS
Posts: 6340
Joined: 26 Jan 2011 19:36

Re: external antenna

Post by PoltoS »

New one will!
enbemokel
Posts: 417
Joined: 08 Aug 2016 17:36

Re: external antenna

Post by enbemokel »

Hmm, I´m wondering, normaly a smaller RSSI like -60 should be better?!
Is there something wrong with the page in Z-Way?
ssvenn
Posts: 7
Joined: 01 Aug 2020 12:35

Re: external antenna

Post by ssvenn »

If I understand it correctly these graphs measure the random background noise and you want it to be as low as possible since the actual z-wave transmissions have to be stronger than the noise to pick them up reliably.

To get an idea about the RSSI of each node you have to look at the zniffer history, I have a lot of nodes that have weak signals and with the integrated razberry antenna I had trouble communicating with them. Some of them even got wrongly included as battery devices even though they are mains powered. I have reincluded those devices after switching antennas and now they all got included correctly and seem to respond much faster since the network doesn't have to figure out alternative routes and retransmit all the time.

Node 24 with -89dbm was one of the unreliable ones, but it works now that the background noise is below -90dbm
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piet66
Posts: 150
Joined: 04 Feb 2017 17:00

Re: external antenna

Post by piet66 »

In next version V1.14 of MxInfo/Communication you can display the rssi values of your devices as charts.
Raspberry Pi 3 Model B Rev 1.2
Raspbian GNU/Linux 10 (buster)
RaZberry by Z-Wave.Me ZW0500 6.82.01 05.39/35498 1024/2
Z-Way version v3.1.2 from 2020-12-31
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PoltoS
Posts: 6340
Joined: 26 Jan 2011 19:36

Re: external antenna

Post by PoltoS »

@piet66 Thanks for your tool. We are also adding few more diagnostics including the avg RSSI per device based on last packets
vinisz
Posts: 83
Joined: 23 Nov 2019 23:23

Re: external antenna

Post by vinisz »

ssvenn wrote:
13 Apr 2021 22:45
What a huge difference an external antenna made!

Finally my razberry has a direct signal to all nodes, the only ones missing from my setup now are the ones that need to be reincluded because the original interviews failed. I think the next version of the razberry should have a version with some official big external antenna. I think a lot of the difference might just be getting some more distance from the noisy main raspberry pi board.

Screenshot 2021-04-13 at 21.36.47.png
Screenshot 2021-04-13 at 21.37.17.png
How far away is the antenna now ? (From the rpi I mean)
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