devaskim

Why you cannot just set this friendly name to a device label?

If you need that label should be sent to a connected device, you need to copy it to a shared attribute of a device. It could be simple done with...

Dont know. Create new Github issue for this question, maybe someone will anwer

It depends on what aggregation functions database provides with. As I know, Cassandra [supports ](https://cassandra.apache.org/doc/stable/cassandra/cql/functions.html#aggregate-functions)only MIN, MAX, AVG, SUM, COUNT, and Postgres has wider list.

> I use PostgreSQL I meant that both both databases TB works with should support your function

TB doesn't transparently pass function name to a database

> Is there a way to get the stddev with the TB API? no

Hi @gcorthey From the development perspective it is possible, I think. But I don't know if TB team is interested in this feature and what priority this feature will have

It is because each API call (attribute request) is asynchronous, so it will end up independently of Show/Hide function.

You can create custom action and create your image file on the fly. For details see [this SO thread](https://stackoverflow.com/questions/5143504/how-to-create-and-download-an-xml-file-on-the-fly-using-javascript)