zc_error_codes          ZENTRA device and sensor error codes
zc_get_readings         Download sensor readings for a device
zc_has_key              Check whether an API key is available
zc_label_errors         Add human-readable error labels to readings
zc_list_devices         List the devices your API key can access
zc_pivot_wider          Reshape tidy readings into wide format
zc_set_key              Set your ZENTRA Cloud API key
zc_store_access         Read, write, and inspect a zentraR store
zc_store_csv            Store readings as CSV files
zc_store_memory         Store readings in memory (session only)
zc_store_rds            Store readings as RDS files
zc_sync                 Incrementally fetch and store readings
