Iwanna send data to node red from unity so that i can control my robot.
so i suggest to creat a node red server and connect to it form unity wich will be the client.
have you got any idea ?
Step One: you have to find out what interfaces/api's are available in Unity that can be used for this purpose
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all i know is that unity is connected to visual studio (C#.NET)
A quick google search shows Unity includes modules for making HTTP requests - https://docs.unity3d.com/Manual/UnityWebRequest.html
So you could create an HTTP/REST API in Node-RED and call it from Unity as required.
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thank you 
on last request : can you give me examples of API's and interfaces ? ( not necessary available in Unity )
