code in the mqtt user and password

addons/mqtt/mqtt.gd

@@ -189,6 +189,14 @@ func set_last_will(stopic, smsg, retain=false, qos=0):
 	if verbose_level:
 		print("LASTWILL%s topic=%s msg=%s" % [ " <retain>" if retain else "", stopic, smsg])
 
+func set_user_pass(suser, spswd):
+	if suser != null:
+		self.user = suser.to_ascii_buffer()
+		self.pswd = spswd.to_ascii_buffer()
+	else:
+		self.user = null
+		self.pswd = null
+
 func firstmessagetoserver():
 	var clean_session = true
 	var msg = PackedByteArray()
@@ -227,12 +235,12 @@ func firstmessagetoserver():
 		msg.append(len(self.lw_msg) & 0xFF)
 		msg.append_array(self.lw_msg)
 	if self.user != null:
-		msg.append(self.user.length() >> 8)
-		msg.append(self.user.length() & 0xFF)
-		msg.append_array(self.user.to_ascii_buffer())
-		msg.append(self.pswd.length() >> 8)
-		msg.append(self.pswd.length() & 0xFF)
-		msg.append_array(self.pswd.to_ascii_buffer())
+		msg.append(len(self.user) >> 8)
+		msg.append(len(self.user) & 0xFF)
+		msg.append_array(self.user)
+		msg.append(len(self.pswd) >> 8)
+		msg.append(len(self.pswd) & 0xFF)
+		msg.append_array(self.pswd)
 	return msg
 
 func cleanupsockets(retval=false):

mqttexample.gd

@@ -20,15 +20,22 @@ func _on_button_connect_toggled(button_pressed):
 								$VBox/HBoxLastwill/lastwillretain.button_pressed)
 		else:
 			$MQTT.set_last_will("", "", false)
-
+
+		if $VBox/HBoxBroker/brokeruser.text:
+			$MQTT.set_user_pass($VBox/HBoxBroker/brokeruser.text,
+								$VBox/HBoxBroker/brokerpswd.text)
+		else:
+			$MQTT.set_user_pass(null, null)
+
 		$VBox/HBoxBrokerControl/status.text = "connecting..."
 		var brokerurl = $VBox/HBoxBroker/brokeraddress.text
 		var protocol = $VBox/HBoxBroker/brokerprotocol.get_item_text($VBox/HBoxBroker/brokerprotocol.selected)
 		$MQTT.connect_to_broker("%s%s:%s" % [protocol, brokerurl, $VBox/HBoxBroker/brokerport.text])
 
 	else:
-		$VBox/HBoxBrokerControl/status.text = "disconnecting..."
+		#$VBox/HBoxBrokerControl/status.text = "disconnecting..."
 		$MQTT.disconnect_from_server()
+
 
 func brokersettingsactive(active):
 	$VBox/HBoxBroker/brokeraddress.editable = active

mqttexample.tscn

@@ -81,6 +81,20 @@ layout_mode = 2
 size_flags_horizontal = 3
 text = "broker.hivemq.com"
 
+[node name="Label4" type="Label" parent="VBox/HBoxBroker"]
+layout_mode = 2
+text = "User:"
+
+[node name="brokeruser" type="LineEdit" parent="VBox/HBoxBroker"]
+layout_mode = 2
+
+[node name="Label5" type="Label" parent="VBox/HBoxBroker"]
+layout_mode = 2
+text = "Pswd:"
+
+[node name="brokerpswd" type="LineEdit" parent="VBox/HBoxBroker"]
+layout_mode = 2
+
 [node name="Label2" type="Label" parent="VBox/HBoxBroker"]
 layout_mode = 2
 text = "Port: "