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+ +internal sealed class Jciebu2 +{ + public string Ts { get; set; } = string.Empty; + public string Location { get; set; } = string.Empty; + public double TemperatureC { get; set; } + public double HumidityRh { get; set; } + public double AmbientLight { get; set; } + public double PressureHpa { get; set; } + public double NoiseDb { get; set; } + public double EtvocPpb { get; set; } + public double Eco2Ppm { get; set; } + public double DiscomfortIndex { get; set; } + public double HeatstrokeIndex { get; set; } + public int VibrationInfo { get; set; } + public double SiValue { get; set; } + public double PgaGal { get; set; } + public double SeismicIntensity { get; set; } + public int TemperatureFlag { get; set; } + public int HumidityFlag { get; set; } + public int AmbientLightFlag { get; set; } + public int PressureFlag { get; set; } + public int NoiseFlag { get; set; } + public int EtvocFlag { get; set; } + public int Eco2Flag { get; set; } + public int DiscomfortFlag { get; set; } + public int HeatstrokeFlag { get; set; } + public int SiFlag { get; set; } + public int PgaFlag { get; set; } + public int SeismicIntensityFlag { get; set; } +} diff --git a/JsonContext.cs b/JsonContext.cs new file mode 100644 index 0000000..95e2448 --- /dev/null +++ b/JsonContext.cs @@ -0,0 +1,9 @@ +using System.Text.Json.Serialization; + +namespace SensorReadings; + +[JsonSourceGenerationOptions(DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull)] +[JsonSerializable(typeof(Jciebu2))] +internal sealed partial class SensorReadingsJsonContext : JsonSerializerContext +{ +} diff --git a/Program.cs b/Program.cs new file mode 100644 index 0000000..a2f0e52 --- /dev/null +++ b/Program.cs @@ -0,0 +1,278 @@ +using System.Globalization; +using System.IO.Ports; +using System.Net.Http.Headers; +using System.Text; +using System.Text.Json; + +namespace SensorReadings; + +internal sealed class Program +{ + private const int DisplayRuleNormallyOff = 0; + private const int DisplayRuleNormallyOn = 1; + + private static readonly string Port = GetEnv("SENSOR_PORT", "/dev/ttyUSB0"); + private static readonly string Location = GetEnv("SENSOR_LOCATION", "home_2f"); + private static readonly string ODataUrl = GetEnv("ODATA_URL", "http://10.16.1.100:8016/odata/SensorReadings"); + private static readonly string ODataToken = GetEnv("ODATA_TOKEN", string.Empty).Trim(); + private static readonly double TimeoutSeconds = GetEnvDouble("ODATA_TIMEOUT_S", 10); + + private static int Main(string[] args) + { + try + { + var reading = GetLatestReading(Port, Location, led: true); + if (HasArg(args, "--dry")) + { + var json = JsonSerializer.Serialize(reading, SensorReadingsJsonContext.Default.Jciebu2); + Console.WriteLine(json); + return 0; + } + + var (statusCode, body) = PostODataAsync(reading).GetAwaiter().GetResult(); + + if (statusCode >= 200 && statusCode < 300) + { + Console.WriteLine("ok"); + return 0; + } + + Console.Error.WriteLine($"http {statusCode}: {body}"); + return 2; + } + catch (Exception ex) + { + Console.Error.WriteLine($"error: {ex.Message}"); + return 2; + } + } + + private static async Task<(int StatusCode, string Body)> PostODataAsync(Jciebu2 payload) + { + using var client = new HttpClient + { + Timeout = TimeSpan.FromSeconds(TimeoutSeconds) + }; + + var json = JsonSerializer.Serialize(payload, SensorReadingsJsonContext.Default.Jciebu2); + using var content = new StringContent(json, Encoding.UTF8, "application/json"); + + if (!string.IsNullOrEmpty(ODataToken)) + { + client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", ODataToken); + } + + client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json")); + + using var resp = await client.PostAsync(ODataUrl, content).ConfigureAwait(false); + var body = await resp.Content.ReadAsStringAsync().ConfigureAwait(false); + return ((int)resp.StatusCode, body); + } + + private static Jciebu2 GetLatestReading(string port, string? location, bool led) + { + using var serial = new SerialPort(port, 115200, Parity.None, 8, StopBits.One) + { + ReadTimeout = 1000, + WriteTimeout = 1000 + }; + + serial.Open(); + + try + { + if (led) + { + var ledOn = new byte[] + { + 0x52, 0x42, 0x0A, 0x00, 0x02, 0x11, 0x51, DisplayRuleNormallyOn, 0x00, 0x00, 0xFF, 0x00 + }; + WriteWithCrc(serial, ledOn); + Thread.Sleep(100); + ReadAvailable(serial, TimeSpan.FromMilliseconds(300)); + } + + var latest = new byte[] { 0x52, 0x42, 0x05, 0x00, 0x01, 0x21, 0x50 }; + WriteWithCrc(serial, latest); + Thread.Sleep(100); + var data = ReadAvailable(serial, TimeSpan.FromSeconds(1)); + var reading = ParseLatestDataLong(data); + + var now = DateTimeOffset.UtcNow; + var trimmed = now.AddTicks(-(now.Ticks % TimeSpan.TicksPerSecond)); + reading.Ts = trimmed.ToString("yyyy-MM-dd'T'HH:mm:ss'Z'", CultureInfo.InvariantCulture); + reading.Location = string.IsNullOrEmpty(location) ? Location : location; + + return reading; + } + finally + { + try + { + if (led) + { + var ledOff = new byte[] + { + 0x52, 0x42, 0x0A, 0x00, 0x02, 0x11, 0x51, DisplayRuleNormallyOff, 0x00, 0x00, 0x00, 0x00 + }; + WriteWithCrc(serial, ledOff); + Thread.Sleep(100); + } + } + catch + { + // best effort + } + + try + { + if (serial.IsOpen) + { + serial.Close(); + } + } + catch + { + // best effort + } + } + } + + private static void WriteWithCrc(SerialPort serial, byte[] command) + { + var crc = CalcCrc(command); + var buf = new byte[command.Length + crc.Length]; + Buffer.BlockCopy(command, 0, buf, 0, command.Length); + Buffer.BlockCopy(crc, 0, buf, command.Length, crc.Length); + serial.Write(buf, 0, buf.Length); + } + + private static byte[] ReadAvailable(SerialPort serial, TimeSpan timeout) + { + var deadline = DateTime.UtcNow + timeout; + var buffer = new List(); + var lastLen = -1; + + while (DateTime.UtcNow < deadline) + { + var available = serial.BytesToRead; + if (available > 0) + { + var chunk = new byte[available]; + var read = serial.Read(chunk, 0, available); + if (read > 0) + { + buffer.AddRange(chunk.Take(read)); + } + } + + if (buffer.Count == lastLen) + { + break; + } + + lastLen = buffer.Count; + Thread.Sleep(50); + } + + return buffer.ToArray(); + } + + private static Jciebu2 ParseLatestDataLong(byte[] data) + { + if (data.Length < 56) + { + throw new InvalidOperationException($"response too short: {data.Length} bytes (need >= 56)"); + } + + return new Jciebu2 + { + TemperatureC = S16Le(data, 8) / 100.0, + HumidityRh = U16Le(data, 10) / 100.0, + AmbientLight = U16Le(data, 12), + PressureHpa = U32Le(data, 14) / 1000.0, + NoiseDb = U16Le(data, 18) / 100.0, + EtvocPpb = U16Le(data, 20), + Eco2Ppm = U16Le(data, 22), + DiscomfortIndex = U16Le(data, 24) / 100.0, + HeatstrokeIndex = S16Le(data, 26) / 100.0, + VibrationInfo = data[28], + SiValue = U16Le(data, 29) / 10.0, + PgaGal = U16Le(data, 31) / 10.0, + SeismicIntensity = U16Le(data, 33) / 1000.0, + TemperatureFlag = U16Le(data, 35), + HumidityFlag = U16Le(data, 37), + AmbientLightFlag = U16Le(data, 39), + PressureFlag = U16Le(data, 41), + NoiseFlag = U16Le(data, 43), + EtvocFlag = U16Le(data, 45), + Eco2Flag = U16Le(data, 47), + DiscomfortFlag = U16Le(data, 49), + HeatstrokeFlag = U16Le(data, 51), + SiFlag = data[53], + PgaFlag = data[54], + SeismicIntensityFlag = data[55] + }; + } + + private static byte[] CalcCrc(byte[] buf) + { + var crc = 0xFFFF; + for (var i = 0; i < buf.Length; i++) + { + crc ^= buf[i]; + for (var bit = 0; bit < 8; bit++) + { + var carry = crc & 1; + crc >>= 1; + if (carry == 1) + { + crc ^= 0xA001; + } + } + } + + var crcH = (byte)(crc >> 8); + var crcL = (byte)(crc & 0x00FF); + return new[] { crcL, crcH }; + } + + private static ushort U16Le(byte[] data, int offset) => + (ushort)(data[offset] | (data[offset + 1] << 8)); + + private static short S16Le(byte[] data, int offset) => + (short)(data[offset] | (data[offset + 1] << 8)); + + private static uint U32Le(byte[] data, int offset) => + (uint)(data[offset] + | (data[offset + 1] << 8) + | (data[offset + 2] << 16) + | (data[offset + 3] << 24)); + + private static string GetEnv(string name, string defaultValue) + { + var value = Environment.GetEnvironmentVariable(name); + return string.IsNullOrEmpty(value) ? defaultValue : value; + } + + private static double GetEnvDouble(string name, double defaultValue) + { + var value = Environment.GetEnvironmentVariable(name); + return double.TryParse(value, NumberStyles.Float, CultureInfo.InvariantCulture, out var parsed) + ? parsed + : defaultValue; + } + + private static bool HasArg(string[] args, string name) + { + foreach (var arg in args) + { + if (string.Equals(arg, name, StringComparison.OrdinalIgnoreCase)) + { + return true; + } + } + + return false; + } +} diff --git a/SensorReadings.csproj b/SensorReadings.csproj new file mode 100644 index 0000000..69644e0 --- /dev/null +++ b/SensorReadings.csproj @@ -0,0 +1,19 @@ + + + + Exe + net10.0 + enable + enable + linux-arm64 + true + true + partial + true + + + + + + + diff --git a/SensorReadings.sln b/SensorReadings.sln new file mode 100644 index 0000000..24b24ea --- /dev/null +++ b/SensorReadings.sln @@ -0,0 +1,24 @@ +Microsoft Visual Studio Solution File, Format Version 12.00 +# Visual Studio Version 17 +VisualStudioVersion = 17.5.2.0 +MinimumVisualStudioVersion = 10.0.40219.1 +Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SensorReadings", "SensorReadings.csproj", "{E4ACBE0B-56BA-0616-A96F-445ACBF7884D}" +EndProject +Global + GlobalSection(SolutionConfigurationPlatforms) = preSolution + Debug|Any CPU = Debug|Any CPU + Release|Any CPU = Release|Any CPU + EndGlobalSection + GlobalSection(ProjectConfigurationPlatforms) = postSolution + {E4ACBE0B-56BA-0616-A96F-445ACBF7884D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU + {E4ACBE0B-56BA-0616-A96F-445ACBF7884D}.Debug|Any CPU.Build.0 = Debug|Any CPU + {E4ACBE0B-56BA-0616-A96F-445ACBF7884D}.Release|Any CPU.ActiveCfg = Release|Any CPU + {E4ACBE0B-56BA-0616-A96F-445ACBF7884D}.Release|Any CPU.Build.0 = Release|Any CPU + EndGlobalSection + GlobalSection(SolutionProperties) = preSolution + HideSolutionNode = FALSE + EndGlobalSection + GlobalSection(ExtensibilityGlobals) = postSolution + SolutionGuid = {FC84C1AF-2672-4E1A-8605-5C7C2556923A} + EndGlobalSection +EndGlobal