Update readme.

integrations/inputunifi/cmd/unifi-poller/README.md

@@ -13,7 +13,7 @@ unifi-poller(1) -- Utility to poll UniFi Controller Metrics and store them in In
 
 ## OPTIONS
 
-`unifi-poller [-c <config-file>] [-h] [-v]`
+`unifi-poller [-c <config-file>] [-j <filter>] [-h] [-v]`
 
     -c, --config <config-file>
         Provide a configuration file (instead of the default).
@@ -21,6 +21,17 @@ unifi-poller(1) -- Utility to poll UniFi Controller Metrics and store them in In
     -v, --version
         Display version and exit.
 
+    -j, --dumpjson <filter>
+        This is a debug option; use this when you are missing data in your graphs,
+        and/or you want to inspect the raw data coming from the controller. The
+        filter only accept two options: devices or clients. This will print a lot
+        of information. Recommend piping it into a file and/or into jq for better
+        visualization. This requires a working config file that; one that contains
+        working authentication details for a Unifi Controller. This only dumps
+        data for sites listed in the config file. The application exits after
+        printing the JSON payload; it does not daemonize or report to InfluxDB
+        with this option.
+
     -h, --help
         Display usage and exit.
 

integrations/inputunifi/cmd/unifi-poller/jsondebug.go

@@ -21,7 +21,7 @@ func (c *Config) DumpJSON(filter string) error {
 		return err
 	}
 	controller.ErrorLog = func(m string, v ...interface{}) {
-		fmt.Fprintf(os.Stderr, m, v...)
+		fmt.Fprintf(os.Stderr, "[ERROR] "+m, v...)
 	} // Log all errors to stderr.
 
 	switch sites, err := filterSites(controller, c.Sites); {
@@ -36,10 +36,6 @@ func (c *Config) DumpJSON(filter string) error {
 	}
 }
 
-func errorLog(m string, v ...interface{}) {
-	fmt.Fprintf(os.Stderr, m, v...)
-}
-
 // DumpClientsJSON prints the raw json for clients in a Unifi Controller.
 func (c *Config) DumpClientsJSON(sites []unifi.Site, controller *unifi.Unifi) error {
 	for _, s := range sites {