Ready to test in Fab

Server/Services/SerialService.cs

@@ -0,0 +1,44 @@
+using Barcode.Host.Server.Models;
+using Barcode.Host.Shared.Models.Stateless;
+using System.Text;
+
+namespace Barcode.Host.Server.Services;
+
+public class SerialService : ISerialService
+{
+
+    private string _LastRaw;
+    private readonly AppSettings _AppSettings;
+    private readonly System.IO.Ports.SerialPort _SerialPort;
+
+    public SerialService(AppSettings appSettings)
+    {
+        _LastRaw = string.Empty;
+        _AppSettings = appSettings;
+        _SerialPort = new("/dev/ttyUSB0", 9600) { ReadTimeout = 2 };
+    }
+
+    void ISerialService.Open() =>
+        _SerialPort.Open();
+
+    void ISerialService.Close() =>
+        _SerialPort.Close();
+
+    void ISerialService.SerialPortWrite(int count, string raw)
+    {
+        if (raw != _LastRaw)
+        {
+            string message;
+            if (count == _AppSettings.ExpectedScanLengthA)
+                message = $" {raw[2..]} {DateTime.Now:h:m tt}";
+            else if (count == _AppSettings.ExpectedScanLengthB)
+                message = $" {raw[2..]}";
+            else
+                message = $" {raw}";
+            byte[] bytes = Encoding.ASCII.GetBytes(message);
+            _SerialPort.Write(bytes, 0, bytes.Length);
+            _LastRaw = raw;
+        }
+    }
+
+}