DeviceService.proto

syntax = "proto3";

package IoT;

import "google/protobuf/empty.proto";

service DeviceService {
	rpc GetDeviceInformation (google.protobuf.Empty) returns (DeviceInfo);
	rpc ReadOutput (OutputReadRequest) returns (OutputValue);
	rpc ReadOutputStream (OutputReadRequest) returns (stream OutputValue);
}

enum DeviceHealthCheck {
	NONE = 0;
	PULL = 1;
	STREAM = 2;
	BOTH = 3;
}

message OutputTypes {
	message Digital {}
	message Analog {
		int32 min_value = 1;
		int32 max_value = 2;
	}
}

message InputTypes {
	message Digital {}
	message Analog {
		int32 min_value = 1;
		int32 max_value = 2;
	}
}
message OutputReadRequest {
	uint32 index = 1;
}

message OutputValue {
	message DigitalValue {
		bool value = 1;
	}
	message AnalogValue {
		int32 value = 2;
	}
	oneof Value {
		DigitalValue digital = 1;
		AnalogValue analog = 2;
	}
}

message DeviceInfo {
	string id = 1;
	DeviceHealthCheck health_check = 2;
	optional string name = 3;

	enum OutputMode {
		UNREDEABLE = 0;
		READ = 1;		// gRPC method invoke
		READ_STREAM = 2;		// gRPC stream
		PUSH_TO_BUS = 3;		// Set PUSH endpoint/queue
	}

	enum InputMode {
		UNCOMMANDABLE = 0;
		SELF_PULL = 1;		// read commands from queue
		WRITE_STREAM = 2;		// input stream
		INVOKE = 3;		// gRPC method invoke
	}

	message DeviceOutput {
		uint32 index = 1;
		optional string name = 2;
		repeated OutputMode modes = 3;
		oneof output_type {
			OutputTypes.Digital digital = 101;
			OutputTypes.Analog analog = 102;
		}
	}
	repeated DeviceOutput outputs = 4;
	
	message DeviceInput {
		uint32 index = 1;
		optional string name = 2;
		repeated InputMode modes = 3;
		oneof input_type {
			InputTypes.Digital digital = 101;
			InputTypes.Analog analog = 102;
		}
	}
	repeated DeviceInput inputs = 5;
}