[Issue #1] - Adding UpdateInterval config value to set how long to wait in between each update loop, in seconds

config.go.example

@@ -1,5 +1,9 @@
 package main
 
+import (
+	"time"
+)
+
 const (
 	WifiSSID = "My Wifi Name"
 	WifiPass = "SecretWifiPassword"
@@ -12,4 +16,6 @@ const (
 	NodeName = "Studio Weather"
 	NodeID   = "studio_env"
 	ClientID = "pico2w_studio_env"
+
+	UpdateInterval = 30 * time.Second
 )

main.go

@@ -346,6 +346,6 @@ func main() {
 			}
 		}
 
-		time.Sleep(30 * time.Second)
+		time.Sleep(UpdateInterval)
 	}
 }