KSKENYON <[email protected]> writes:
> I'm stumped. wxMesh.py v0.2 runs fine with b7 and python3 after a few
> small tweaks.
>
> Now matter what or how I send data from mosquitto I get this weewx error
> about being unable to convert to float. I've tried every format I can
> think of on the publish line and everything is rejected. I must be missing
> something obvious about the format for the publish data. Any ideas?
>
> Jan 05 17:49:12 mythtv /weewxd[173413]: wxMesh: dateTime 1578264552
>
> Jan 05 17:49:12 mythtv /weewxd[173413]: *wxMesh: cannot read value for
> 'weewx': could not convert string to float: "b'{time:0}\\n\\n'"*
MQTT defines how to send a value on a topic, but does not declare how
values must be formatted -- so it is part of an application-level
protocol specification, but not the whole thing.
Someplace, someone should have written down what topics are in use and
how the values should be formatted. Then, for wxMesh as a receiver,
there can be a notion of what is correct to transmit. I would suggest
that doing that in arrears is a useful exercise to resolve your issue,
even though it may appear like too much work and unfun.
In your log, it's really hard to tell whether the value is
b'{time:0}\\n\\n'
which looks like python 3 source code for a string with something that
looks sort of like json in it, or
{time:0}
which looks like json, except that time is not quoted.
It seems very likely that your issue is a lack of agreement between the
sender and receiver about these sorts of things.
I am not using wxMesh, but I am using the MQTT publish extension, using
the aggregate method to publish a json dictonary, which begins
{"monthET": "0.06", ......
and that is read by Home Assistant (using a template sensor to extract
the value for a key) just fine.
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