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About ahmadKhairi
since
11-09-2020
08-08-2024
ahmadKhairi
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09-19-2022
01:04 PM
Hi, thank you for your feedback. Yes you are right. I managed to find the solution when I referred to the example MQTT Client SL FB with the visualization. Everything works now. Since the MQTTClient and MQTTSubscribe variables are available in the Data Layer, I brought it up to webiq and created a similar hmi which now can be accessed using a tablet pc/iPad. Thanks!
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09-19-2022
11:53 AM
Hi, thank you for your feedback. I changed to the IP address you suggested and connection is successful. How did you convert from "broker.hivemq.com" to the IP Address : 3.120.66.120? I added an MQTT tag to subscribe to a topic to get a temperature sensor data but where can I see this data from DeviceBridge app? For the case of connecting to the ctrlX Cedalo MQTT Broker, the connection is still unsuccessful. For secure MQTT, Port has to be set to 8883 for TLS connection and have to include parameters such as Username, Password and ClientId. Any idea how can this be done within DeviceBridge?
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09-14-2022
08:29 PM
Hi, I am just trying out the MQTT Client SL library after installing the CODESYS IIoT Libraries into ctrlX PLC. I am using Cedalo MQTT broker installed in my ctrlX CORE at port 8883. From ctrlX PLC, I have successfully connected to the MQTT Broker using the MQTTClient function block. So my next attempt is to subscribe to a mqtt topic by using the MQTTSubscribe function block. The topic in this case is a "Temperature" topic that was already published to the mqtt broker from a sensor. My attempt is to retrieve the message from the topic in ctrlX PLC. According to the FB description, the input wsTopicFilter is a WSTRING(1024) data type. However after adding the MQTT Subscribe FB and downloaded to PLC, I got the error at the output of the MQTTSubscribe FB: VAR_OUTPUT MQTTSubscribe.eMQTTError : MQTT_Error --> TOPIC_FILTER_EMPTY Can anyone help?
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09-13-2022
10:58 AM
Hi, I am trying to subscribe to 2 different brokers using the DeviceBridge app: 1. Cedalo MQTT Broker app on ctrlX CORE 2. Cloud based public broker like broker.hivemq.com (Port 1883) For Broker 1. I have created the MQTT device (see to DeviceBridge_Add_MQTT_Device_2022-09-13.png) When I tested the connection to the broker, connection failed (see DeviceBridge_MQTT_Test_2022-09-13.png) What do I do to be able to connect to the broker? Do you have some kind of a documentation available? For Broker 2. how do I create the mqtt device but the server (broker.hivemq.com) is not in IP address format? Next, how do I subscribe to an mqtt topic once I have successfully connected to the broker from the DeviceBridge app? Do I create an mqtt tag after? I mean so far I cannot test this because communication with the broker is still not established. Hope anyone can help me on this. Thank you!
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09-13-2022
03:53 AM
I already found a solution to my own question. The issues I had: 1. In HeidiSQL, the user created is not linked to ctrlX IP address. 2. In ctrlX Node-RED MySQL node, the database is not pointed to where the database was located. So I did this instead: - Inside HeidiSQL Query: CREATE USER 'ctrlxCore'@'192.168.0.234' IDENTIFIED BY 'password'; Where 192.168.0.234 is my ctrlX Core device - Inside Node-RED MySQL database node: Host: 192.168.0.132 (my computer IP where database was created/installed) port: 3306 user: ctrlxCore password: password database: ctrlx Charset: UTF8 In HeidiSQL, I dropped the previously created TABLES and created a new and simple TABLE to get values from mqtt-in node: CREATE TABLE humidity ( VALUE VARCHAR(100), TIMESTAMP timestamp NOT NULL DEFAULT current_timestamp() ON UPDATE ); You can refer to my Node-RED flow as per attached screenshots. Thank you
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