Part 3: Scheduling

Sensor and exporter drivers can be executed manually using the read and write commands respectively:

$ gardnr read  # executes sensor drivers
$ gardnr write # executes exporter drivers

This can be tedious and inconvenient to manually run commands in a shell to execute driver code. Schedules can be used to automatically execute drivers. First a schedule must be created. Schedules can be added to GARDNR using CRON syntax.

$ gardnr add schedule every-five-minutes \*/5 \* \* \* \*
You entered: Every 5 minutes
Does this look correct? ([y]/n)

Note that the \* is to escape the astericks so it is not evaluated by the shell as a wildcard. The command above will add a schedule named every-five-minutes after you confirm by typing y and then Enter. Next, schedule a driver. We will schedule the hello-world-sensor we created in Part 1: Logging metric data with Drivers:

$ gardnr schedule add hello-world-sensor every-five-minutes

To execute scheduled drivers, enter the following command which will run indefinitely:

$ gardnr-automata