Fabios Posted May 7, 2022 Report Share Posted May 7, 2022 Hi, I'm newbie of the MQTT protocol, I have reading something on internet for a new application with unistream and MQTT protocol. On the help file I read: "UniStream supports MQTT as a 'client' that can both publish, and subscribe, to messages." OK it's clear, so I nead of a local broker (for istance: a raspberry pi and mosquitto). Then I try to study an example of unilogic software where I read: "UniStream can be configure to be a MQTT server." So, what does it mean as "server"? Thanks in advance. Quote Link to comment Share on other sites More sharing options...
NoamM Posted May 8, 2022 Report Share Posted May 8, 2022 Dear Fabios, Quote Then I try to study an example of unilogic software where I read: "UniStream can be configure to be a MQTT server." Can you refer me to the screen? Its a mistake. UniStream can only act as an MQTT client. In MQTT the terminology is Broker, and not Server - There are a lot on resources on network on MQTT broker manner. Quote Link to comment Share on other sites More sharing options...
Fabios Posted May 8, 2022 Author Report Share Posted May 8, 2022 Yes UniStream can only act as client. With the word server I can imagine that the plc is the client that governs the system, reads values from some clients and writes other values to other MQTT clients. BR Quote Link to comment Share on other sites More sharing options...
NoamM Posted May 8, 2022 Report Share Posted May 8, 2022 It seems you are right. Thanks for clarifying it. Quote Link to comment Share on other sites More sharing options...
Cara Bereck Levy Posted May 10, 2022 Report Share Posted May 10, 2022 Hi @Fabios! I have asked the team to fix the comment in that example program, including removing the word 'server' and replace it with 'client'. Thank you so much for pointing that out, and I apologize if this error caused problems! Ciao 🙂 1 Quote Link to comment Share on other sites More sharing options...
Fabios Posted May 14, 2022 Author Report Share Posted May 14, 2022 Not at all @Cara Bereck Levy Quote Link to comment Share on other sites More sharing options...
MVP 2023 Joe Tauser Posted May 24, 2022 MVP 2023 Report Share Posted May 24, 2022 I so miss the terms "Master" and "Slave"..... They are very clear, if not politically correct. Modbus is the last holdout. In a business relationship, is the Client the Master or the Slave? Guess it depends. Joe T. Quote Link to comment Share on other sites More sharing options...
MVP 2023 Ausman Posted May 24, 2022 MVP 2023 Report Share Posted May 24, 2022 1 hour ago, Joe Tauser said: In a business relationship, is the Client the Master or the Slave? Guess it depends. I guess it all depends on the "termination resistance"! 🙂 Quote Link to comment Share on other sites More sharing options...
Fernando Castro Posted July 21, 2022 Report Share Posted July 21, 2022 On 5/23/2022 at 8:53 PM, Joe Tauser said: I so miss the terms "Master" and "Slave"..... They are very clear, if not politically correct. Modbus is the last holdout. In a business relationship, is the Client the Master or the Slave? Guess it depends. Joe T. On my first approach to these new terminologies I was a little bit confused too but its quite easy ... The client requests, then the server serves, so the server is the slave and the client is the master. Therefore, in a business relationship the Client is the master 😅 Quote Link to comment Share on other sites More sharing options...
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