Description
There are certain settings in hardware which are helpful to be backed up to databases as the hardware "forgets" the setting when power cycled. It may also go to a default setting. This may also happen accidentally when restarting the Thing especially when the device driver is re-initialized.
Since settings are generally modelled as properties, after the property write, the value can be stored to the database.
We also support JSON files to be used in place of actual databases (In this case the db_engine value of Thing points to a file descriptor of JSON file)
As a further extension of this JSON based storage, we want to "version" this backup so that settings history can be tracked in time.
Moreover, for running experiment scans, it useful to be able to fetch and populate new settings in every run of the loop.
There is an experimental implementation of a tool which helps with this: corev
The workflow is to be described as follows:
- upcoming