Sorry to intrude but I'm following this thread with great interest. Making weather information available to all kind of systems is what I'm busy with right now.

RRDTool I used to work with for many, many years. I think it is a great tool for logging en graphical representing data. However I really think it should not be used as a data source. There are too many options to log data and therefore writing client software will be either difficult or very limited in usage.

I was thinking of making an INDI interface or driver which can subscribe or even publish to messages on a message broker. For all kinds of environmental data like temperature(s), switches, battery level, water level etc. I use a MQTT (Mosquitto) broker on a Raspi. This is extremely easy to use and is suitable for all kinds of data, in fact it is quite data independent.

Sorry again for breaking in but I did want to give you my 2cts.

Kind regards,
Gerard

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