i wanna to develop a box of adge serve to combine all communication protocol into one protocol to make main serve easier.
but something beyond my comprehension. I boot a websocket serve, and invoke it, the flow node socket in, didn't triggered.
so i wonder what does socket in really do?
Welcome to the group.
Sorry, but I don't understand what you mean by that.
Could you elaborate on what you mean: all communication protocol into one protocol ??
Protocols are used for a reason. You can't (or maybe shouldn't) change protocols willy nilly just because you want to.
thanks for your reply. i have several devices. some invoke via http, some invoke via mqtt, others invoke via websocket. but my main server only handle http. so i setup adge serve to convert http, mqtt, websocket to http.
sorry to confuse, and very appreciated your direction.
I am not sure I am going to be able to help you.
thanks sir. anyway i am appreciated.
If you want a unified protocol I think it might be better to use MQTT rather than http. I think that might be simpler.
In fact, thinking about it, that is effectively what I already do. Most sensors provide their data via MQTT already, but for those that don't, modbus devices for example, I poll them and write the values to MQTT so anywhere they are needed they are available via MQTT.
get your points. in coming may not from devices only. so there are difference types of incoming protocal. what confuse me is what node websocket in do? i am assuming, it triggered when devices provide data, but in fact it triggered when websocket serve response to devices.
i am jumping high expecting your answer.
It listens on a websocket and passes on any data received by that socket.
The screenshot you posted does not contain a Websocket In node. The node labelled 'websocket in' is an Inject node.
i wire a flow like photoshot below
then boot a websocket serve. the green mark of websocket in node and debug print show it connected.then i connected websocket and send a msg to the serve via websocket testing tool.
the flow stay idle no any response while websocket testing tool connected the serve.
The websocket-in node is used for establishing the websocket client connection.
Once connected, you can send data to the websocket-out node (if setup properly it is "internally" connected to the websocket-in node - this is required to understand which connected client is sending/receiving data).
So in your example flow - the http request node is only called once.
thank you bakman2. i am naive, i will try to figure it out. your word is beacon in the dark
thanks for the concern. i am now find out my answer. you can regard socket in node as a socket server. http in node equal to a API. it work that way.
thanks sincerely Henry
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