measurement.proto

syntax = "proto3";
package measurement;
option go_package = "github.com/mtraver/environmental-sensor/measurementpb";

import "google/protobuf/descriptor.proto";
import "google/protobuf/empty.proto";
import "google/protobuf/timestamp.proto";
import "google/protobuf/wrappers.proto";

message MeasurementOptions {
  string metric = 1;
  string unit = 2;
}

extend google.protobuf.FieldOptions {
  string regex = 50000;
  MeasurementOptions measurement_options = 50001;
}

message Measurement {
  string device_id = 1 [(regex) = "^[a-z][a-z0-9+.%~_-]{2,254}$"];
  google.protobuf.Timestamp timestamp = 2;
  google.protobuf.FloatValue temp = 3 [(measurement_options).metric = "temp", (measurement_options).unit = "°C"];
  google.protobuf.FloatValue pm25 = 5 [(measurement_options).metric = "PM2.5", (measurement_options).unit = "μg/m³"];
  google.protobuf.FloatValue pm10 = 6 [(measurement_options).metric = "PM10", (measurement_options).unit = "μg/m³"];
  google.protobuf.FloatValue rh = 7 [(measurement_options).metric = "RH", (measurement_options).unit = "%"];

  // This field should only be set when the measurement is not uploaded
  // immediately after it is taken, e.g. if the network goes down and
  // measurements are stored locally before upload is attempted again later.
  google.protobuf.Timestamp upload_timestamp = 4;
}

service MeasurementService {
  rpc GetDevices(google.protobuf.Empty) returns (GetDevicesResponse) {}
  rpc GetLatest(GetLatestRequest) returns (Measurement) {}
}

message GetDevicesResponse {
  repeated string device_id = 1;
}

message GetLatestRequest {
  string device_id = 1;
}