Can I just check there I not a confusion here, I am talking about comms
between client and owserver, not between server and sensor.
On 5 Mar 2017 6:43 p.m., "Stefano Miccoli" <mo...@icloud.com> wrote:
> What you describe (0-size payload message followed by another valid
> message) cannot happen.
> May be what you really mean is a -1 size payload message? This is a “ping”
> which owserver sends every 1 second or so when it is still gathering data
> or under heavy payload.
>
> This is an aspect of the owserver protocol which easily gets unnoticed by
> implementers: please see https://github.com/miccoli/pyownet/pull/1 where Johan
> Ström corrected a similar bug in my pyownet.
>
> S.
>
> On 5 Mar 2017, at 17:51, Colin Law <clan...@gmail.com> wrote:
>
> I am trying to debug a problem on the node.js owserver client
> node-owfs and am looking for some clarification of the owserver
> protocol if possible please.
>
> Referring to [1] in response to a 1-wire read I expect to see a header
> with a payload of the size indicated in the header. Very often what I
> actually see is a header specifying a payload size of 0 followed by
> another header with the expected payload size and valid data. Is that
> normal or is there something strange going on?
>
> This is owserver 3.1p4-1 from the raspbian jessie testing repository
> on a pi zero.
>
> [1] http://owfs.org/index.php?page=owserver-protocol
>
> Colin
>
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