move wifi mode settings to init function

src/VizBlocks.cpp

@@ -78,9 +78,6 @@ void VizBlock::wifi_connect()
 		return;
 	}
 
-	WiFi.mode(WIFI_STA);
-	WiFi.setSleepMode(WIFI_NONE_SLEEP);
-
 		// Connect to WiFi access point.
 	Serial.println();
 	Serial.print("Connecting to ");
@@ -209,6 +206,8 @@ void VizBlock::init()
 	pinMode(D4, OUTPUT);
 	pinMode(D0, OUTPUT);
   	digitalWrite(D4, LOW);
+	WiFi.mode(WIFI_STA);
+	WiFi.setSleepMode(WIFI_NONE_SLEEP);
 
 	if( _wifi )
 	{