Re: [core] RSSI in SenML

Peter Saint-Andre - Filament <peter@filament.com> Wed, 22 March 2017 18:54 UTC

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To: Carsten Bormann <cabo@tzi.org>, Cullen Jennings <fluffy@iii.ca>
References: <0A3A3346-9B5D-48B7-BB52-6DEE39A91200@iii.ca> <41989F03-35A9-4C76-9626-696FE123AFBC@tzi.org>
Cc: core <core@ietf.org>
From: Peter Saint-Andre - Filament <peter@filament.com>
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Date: Wed, 22 Mar 2017 12:54:14 -0600
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Subject: Re: [core] RSSI in SenML
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On 3/22/17 12:52 PM, Carsten Bormann wrote:
> 
>> On 22 Mar 2017, at 19:47, Cullen Jennings <fluffy@iii.ca> wrote:
>> 
>> 
>> I got a request to add RSSI to the table in 12.1 of  of SenML
>> 
>> Symbol: RSSI
>> 
>> Description: Received signal strength indication
>> 
>> Type: float
> 
> RSSI is a quantity (an ill defined one).
> 
> Table 12.1 is about units.
> 
> Is there a unit that RSSI tends to use?
> 
> (For certain Cisco devices, that would be “percent”. Other devices
> try to express their signal strength indications in dBm (typically a
> negative value approximately from -30 to -120).

dBM is what I've seen.

> But I don’t think
> there is any industry-wide way to do this.)

If you know what device you're getting it from, does it matter that we
don't have an industry standard?

Peter