diff --git a/WaveshareUARTFingerprintSensor.Sample/App.config b/WaveshareUARTFingerprintSensor.Sample/App.config
new file mode 100644
index 0000000..56efbc7
--- /dev/null
+++ b/WaveshareUARTFingerprintSensor.Sample/App.config
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/WaveshareUARTFingerprintSensor.Sample/Program.cs b/WaveshareUARTFingerprintSensor.Sample/Program.cs
new file mode 100644
index 0000000..bdd5f59
--- /dev/null
+++ b/WaveshareUARTFingerprintSensor.Sample/Program.cs
@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.IO.Ports;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using Unosquare.RaspberryIO;
+using Unosquare.RaspberryIO.Abstractions;
+using Unosquare.WiringPi;
+
+namespace WaveshareUARTFingerprintSensor.Sample
+{
+ class Program
+ {
+ static void Main(string[] args)
+ {
+ var sensor = new FingerprintSensor(FingerprintSensor.PrimarySerialPort);
+
+ sensor.Start();
+
+ var count = sensor.GetUserCount();
+
+ Thread.Sleep(-1);
+ }
+ }
+}
diff --git a/WaveshareUARTFingerprintSensor.Sample/Properties/AssemblyInfo.cs b/WaveshareUARTFingerprintSensor.Sample/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..f180a5e
--- /dev/null
+++ b/WaveshareUARTFingerprintSensor.Sample/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// Les informations générales relatives à un assembly dépendent de
+// l'ensemble d'attributs suivant. Changez les valeurs de ces attributs pour modifier les informations
+// associées à un assembly.
+[assembly: AssemblyTitle("WaveshareUARTFingerprintSensor.Sample")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("WaveshareUARTFingerprintSensor.Sample")]
+[assembly: AssemblyCopyright("Copyright © 2020")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// L'affectation de la valeur false à ComVisible rend les types invisibles dans cet assembly
+// aux composants COM. Si vous devez accéder à un type dans cet assembly à partir de
+// COM, affectez la valeur true à l'attribut ComVisible sur ce type.
+[assembly: ComVisible(false)]
+
+// Le GUID suivant est pour l'ID de la typelib si ce projet est exposé à COM
+[assembly: Guid("0a9c9910-45e4-428f-9bc4-054808794c66")]
+
+// Les informations de version pour un assembly se composent des quatre valeurs suivantes :
+//
+// Version principale
+// Version secondaire
+// Numéro de build
+// Révision
+//
+// Vous pouvez spécifier toutes les valeurs ou indiquer les numéros de build et de révision par défaut
+// en utilisant '*', comme indiqué ci-dessous :
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/WaveshareUARTFingerprintSensor.Sample/WaveshareUARTFingerprintSensor.Sample.csproj b/WaveshareUARTFingerprintSensor.Sample/WaveshareUARTFingerprintSensor.Sample.csproj
new file mode 100644
index 0000000..24ae430
--- /dev/null
+++ b/WaveshareUARTFingerprintSensor.Sample/WaveshareUARTFingerprintSensor.Sample.csproj
@@ -0,0 +1,107 @@
+
+
+
+
+ Debug
+ AnyCPU
+ {0A9C9910-45E4-428F-9BC4-054808794C66}
+ Exe
+ WaveshareUARTFingerprintSensor.Sample
+ WaveshareUARTFingerprintSensor.Sample
+ v4.7.2
+ 512
+ true
+ true
+ publish\
+ true
+ Disk
+ false
+ Foreground
+ 7
+ Days
+ false
+ false
+ true
+ 0
+ 1.0.0.%2a
+ false
+ false
+ true
+
+
+ AnyCPU
+ true
+ full
+ false
+ bin\Debug\
+ DEBUG;TRACE
+ prompt
+ 4
+
+
+ AnyCPU
+ pdbonly
+ true
+ bin\Release\
+ TRACE
+ prompt
+ 4
+
+
+
+ ..\packages\Unosquare.Swan.3.0.0\lib\net461\Swan.dll
+
+
+ ..\packages\Unosquare.Swan.Lite.3.0.0\lib\net461\Swan.Lite.dll
+
+
+
+
+
+
+ ..\packages\System.ValueTuple.4.5.0\lib\net47\System.ValueTuple.dll
+
+
+
+
+
+
+
+
+ ..\packages\Unosquare.Raspberry.Abstractions.0.4.1\lib\netstandard2.0\Unosquare.Raspberry.Abstractions.dll
+
+
+ ..\packages\Unosquare.Raspberry.IO.0.27.1\lib\netstandard2.0\Unosquare.RaspberryIO.dll
+
+
+ ..\packages\Unosquare.WiringPi.0.5.1\lib\netstandard2.0\Unosquare.WiringPi.dll
+
+
+
+
+
+
+
+
+
+
+
+
+ False
+ Microsoft .NET Framework 4.7.2 %28x86 et x64%29
+ true
+
+
+ False
+ .NET Framework 3.5 SP1
+ false
+
+
+
+
+ {dc535997-1161-4a7d-8573-259b13595778}
+ WaveshareUARTFingerprintSensor
+
+
+
+
\ No newline at end of file
diff --git a/WaveshareUARTFingerprintSensor.Sample/packages.config b/WaveshareUARTFingerprintSensor.Sample/packages.config
new file mode 100644
index 0000000..e93a0bf
--- /dev/null
+++ b/WaveshareUARTFingerprintSensor.Sample/packages.config
@@ -0,0 +1,9 @@
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/WaveshareUARTFingerprintSensor.sln b/WaveshareUARTFingerprintSensor.sln
new file mode 100644
index 0000000..37ebdd2
--- /dev/null
+++ b/WaveshareUARTFingerprintSensor.sln
@@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.30711.63
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WaveshareUARTFingerprintSensor.Sample", "WaveshareUARTFingerprintSensor.Sample\WaveshareUARTFingerprintSensor.Sample.csproj", "{0A9C9910-45E4-428F-9BC4-054808794C66}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WaveshareUARTFingerprintSensor", "WaveshareUARTFingerprintSensor\WaveshareUARTFingerprintSensor.csproj", "{DC535997-1161-4A7D-8573-259B13595778}"
+EndProject
+Global
+ GlobalSection(SolutionConfigurationPlatforms) = preSolution
+ Debug|Any CPU = Debug|Any CPU
+ Release|Any CPU = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(ProjectConfigurationPlatforms) = postSolution
+ {0A9C9910-45E4-428F-9BC4-054808794C66}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {0A9C9910-45E4-428F-9BC4-054808794C66}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {0A9C9910-45E4-428F-9BC4-054808794C66}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {0A9C9910-45E4-428F-9BC4-054808794C66}.Release|Any CPU.Build.0 = Release|Any CPU
+ {DC535997-1161-4A7D-8573-259B13595778}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {DC535997-1161-4A7D-8573-259B13595778}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {DC535997-1161-4A7D-8573-259B13595778}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {DC535997-1161-4A7D-8573-259B13595778}.Release|Any CPU.Build.0 = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(SolutionProperties) = preSolution
+ HideSolutionNode = FALSE
+ EndGlobalSection
+ GlobalSection(ExtensibilityGlobals) = postSolution
+ SolutionGuid = {4D22CA29-4B04-4D9E-A21D-E7DBF3013CBF}
+ EndGlobalSection
+EndGlobal
diff --git a/WaveshareUARTFingerprintSensor/CommandType.cs b/WaveshareUARTFingerprintSensor/CommandType.cs
new file mode 100644
index 0000000..291d5cc
--- /dev/null
+++ b/WaveshareUARTFingerprintSensor/CommandType.cs
@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WaveshareUARTFingerprintSensor
+{
+ public enum CommandType : byte
+ {
+ ModifySerialNumber = 0x08,
+ QuerySerialNumber = 0x2A,
+ SleepMode = 0x2C,
+ ManageFingerprintAddingMode = 0x2D,
+ AddFingerprint1 = 0x01,
+ AddFingerprint2 = 0x02,
+ AddFingerprint3 = 0x03,
+ AddAndAcquireFingerprint = 0x06,
+ DeleteUser = 0x04,
+ DeleteAllUsers = 0x05,
+ QueryUserCount = 0x09,
+ Comparison11 = 0x0B,
+ Comparison1N = 0x0C,
+ QueryPermission = 0x0A,
+ ManageComparisonLevel = 0x28,
+ AcquireImage = 0x24,
+ AcquireEigenvalues = 0x23,
+ UploadEigenvaluesAndCompare = 0x44,
+ UploadEigenvaluesAndCompare11 = 0x42,
+ UploadEigenvaluesAndCompare1N = 0x43,
+ AcquireEigenvaluesDSP = 0x31,
+ CreateUserFromEigenvalues = 0x41,
+ QueryUsersInfo = 0x2B,
+ ManageCaptureTimeout = 0x2E
+ }
+}
diff --git a/WaveshareUARTFingerprintSensor/FingerprintSensor.cs b/WaveshareUARTFingerprintSensor/FingerprintSensor.cs
new file mode 100644
index 0000000..9e3531b
--- /dev/null
+++ b/WaveshareUARTFingerprintSensor/FingerprintSensor.cs
@@ -0,0 +1,162 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.IO.Ports;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using Unosquare.RaspberryIO;
+using Unosquare.RaspberryIO.Abstractions;
+using Unosquare.WiringPi;
+
+namespace WaveshareUARTFingerprintSensor
+{
+ public class FingerprintSensor : IDisposable
+ {
+ public const string PrimarySerialPort = "/dev/ttyAMA0";
+ public const string SecondarySerialPort = "/dev/ttyS0";
+
+ public string PortName { get; }
+
+ private const byte PacketSeparator = 0xF5;
+
+ private SerialPort _serialPort;
+ private int _wakePinNumber;
+ private int _rstPinNumber;
+ private IGpioPin _wakePin;
+ private IGpioPin _rstPin;
+ private object _lock = new object();
+
+ public FingerprintSensor(string portName, int wakePin = 23, int rstPin = 24)
+ {
+ PortName = portName;
+ _wakePinNumber = wakePin;
+ _rstPinNumber = rstPin;
+ }
+
+ public void Start()
+ {
+ // Initialize Gpio
+ Pi.Init();
+
+ _wakePin = Pi.Gpio[_wakePinNumber];
+ _rstPin = Pi.Gpio[_rstPinNumber];
+
+ _wakePin.PinMode = GpioPinDriveMode.Input;
+ _rstPin.PinMode = GpioPinDriveMode.Output;
+
+ _rstPin.Write(GpioPinValue.High);
+ _wakePin.RegisterInterruptCallback(EdgeDetection.FallingAndRisingEdge, OnWake);
+
+ // Initialize SerialPort
+ _serialPort = new SerialPort(PortName, 19200);
+
+ _serialPort.Open();
+ }
+
+ private byte ComputeChecksum(byte[] data)
+ {
+ byte checksum = 0;
+
+ for (int i = 1; i < 6; i++)
+ {
+ checksum += data[i];
+ }
+
+ return checksum;
+ }
+
+ private (byte first, byte second, ResponseType responseType) SendAndReceive(CommandType commandType, byte first, byte second, byte third)
+ {
+ // Command packet
+ byte[] buffer = { PacketSeparator, (byte)commandType, first, second, third, 0, 0, PacketSeparator };
+
+ lock (_lock)
+ {
+
+ // Checksum
+ buffer[6] = ComputeChecksum(buffer);
+
+ _serialPort.Write(buffer, 0, buffer.Length);
+
+ // Response
+ _serialPort.Read(buffer, 0, buffer.Length);
+
+ if (buffer[0] != PacketSeparator || buffer[7] != PacketSeparator || buffer[1] != (byte)commandType)
+ {
+ throw new InvalidDataException("Invalid response from the sensor");
+ }
+
+ if (buffer[6] != ComputeChecksum(buffer))
+ {
+ throw new InvalidDataException("Invalid checksum");
+ }
+ }
+
+ return (buffer[2], buffer[3], (ResponseType)buffer[4]);
+ }
+
+ /*
+ private void Send(CommandType commandType, byte first, byte second, byte third)
+ {
+ // Command packet
+ byte[] buffer = { PacketSeparator, (byte)commandType, first, second, third, 0, 0, PacketSeparator };
+
+ // Checksum
+ buffer[6] = ComputeChecksum(buffer);
+
+ _serialPort.Write(buffer, 0, buffer.Length);
+ }
+
+ private (byte first, byte second, byte third) Receive(CommandType commandType)
+ {
+ // Response buffer
+ var buffer = new byte[8];
+
+ // Response
+ _serialPort.Read(buffer, 0, buffer.Length);
+
+ if (buffer[0] != PacketSeparator || buffer[7] != PacketSeparator || buffer[1] != (byte)commandType)
+ {
+ throw new InvalidDataException("Invalid response from the sensor");
+ }
+
+ if (buffer[6] != ComputeChecksum(buffer))
+ {
+ throw new InvalidDataException("Invalid checksum");
+ }
+
+ return (buffer[2], buffer[3], buffer[4]);
+ }
+ */
+
+ public bool TryGetUserCount(out ushort count)
+ {
+ (byte countHigh, byte countLow, ResponseType response) = SendAndReceive(CommandType.QueryUserCount, 0, 0, 0);
+
+ count = Utils.Merge(countHigh, countLow);
+
+ return response == ResponseType.Success;
+ }
+
+ public void Sleep()
+ {
+ _rstPin.Write(GpioPinValue.Low);
+ }
+
+ private void OnWake()
+ {
+ if (_wakePin.Read())
+ {
+ Console.WriteLine("Sensor WAKE signal received");
+ }
+ }
+
+ public void Dispose()
+ {
+ _serialPort.Close();
+ }
+ }
+}
diff --git a/WaveshareUARTFingerprintSensor/Properties/AssemblyInfo.cs b/WaveshareUARTFingerprintSensor/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..b1a50cc
--- /dev/null
+++ b/WaveshareUARTFingerprintSensor/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// Les informations générales relatives à un assembly dépendent de
+// l'ensemble d'attributs suivant. Changez les valeurs de ces attributs pour modifier les informations
+// associées à un assembly.
+[assembly: AssemblyTitle("WaveshareUARTFingerprintSensor")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("WaveshareUARTFingerprintSensor")]
+[assembly: AssemblyCopyright("Copyright © 2020")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// L'affectation de la valeur false à ComVisible rend les types invisibles dans cet assembly
+// aux composants COM. Si vous devez accéder à un type dans cet assembly à partir de
+// COM, affectez la valeur true à l'attribut ComVisible sur ce type.
+[assembly: ComVisible(false)]
+
+// Le GUID suivant est pour l'ID de la typelib si ce projet est exposé à COM
+[assembly: Guid("dc535997-1161-4a7d-8573-259b13595778")]
+
+// Les informations de version pour un assembly se composent des quatre valeurs suivantes :
+//
+// Version principale
+// Version secondaire
+// Numéro de build
+// Révision
+//
+// Vous pouvez spécifier toutes les valeurs ou indiquer les numéros de build et de révision par défaut
+// en utilisant '*', comme indiqué ci-dessous :
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/WaveshareUARTFingerprintSensor/ResponseType.cs b/WaveshareUARTFingerprintSensor/ResponseType.cs
new file mode 100644
index 0000000..6862a80
--- /dev/null
+++ b/WaveshareUARTFingerprintSensor/ResponseType.cs
@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WaveshareUARTFingerprintSensor
+{
+ public enum ResponseType : byte
+ {
+ Success = 0x00,
+ Fail = 0x01,
+ Full = 0x04,
+ NoUser = 0x05,
+ UserOccupied = 0x06,
+ FingerOccupied = 0x07,
+ Timeout = 0x08
+ }
+}
diff --git a/WaveshareUARTFingerprintSensor/Utils.cs b/WaveshareUARTFingerprintSensor/Utils.cs
new file mode 100644
index 0000000..4a15e8a
--- /dev/null
+++ b/WaveshareUARTFingerprintSensor/Utils.cs
@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WaveshareUARTFingerprintSensor
+{
+ public static class Utils
+ {
+ public static ushort Merge(byte high, byte low) => (ushort)(high << 8 | low);
+
+ public static (byte high, byte low) Split(ushort value) => ((byte)(value >> 8), (byte)(value & 0xFF));
+ }
+}
diff --git a/WaveshareUARTFingerprintSensor/WaveshareUARTFingerprintSensor.csproj b/WaveshareUARTFingerprintSensor/WaveshareUARTFingerprintSensor.csproj
new file mode 100644
index 0000000..93b814a
--- /dev/null
+++ b/WaveshareUARTFingerprintSensor/WaveshareUARTFingerprintSensor.csproj
@@ -0,0 +1,74 @@
+
+
+
+
+ Debug
+ AnyCPU
+ {DC535997-1161-4A7D-8573-259B13595778}
+ Library
+ Properties
+ WaveshareUARTFingerprintSensor
+ WaveshareUARTFingerprintSensor
+ v4.7.2
+ 512
+ true
+
+
+ true
+ full
+ false
+ bin\Debug\
+ DEBUG;TRACE
+ prompt
+ 4
+
+
+ pdbonly
+ true
+ bin\Release\
+ TRACE
+ prompt
+ 4
+
+
+
+ ..\packages\Unosquare.Swan.3.0.0\lib\net461\Swan.dll
+
+
+ ..\packages\Unosquare.Swan.Lite.3.0.0\lib\net461\Swan.Lite.dll
+
+
+
+
+
+
+ ..\packages\System.ValueTuple.4.5.0\lib\net47\System.ValueTuple.dll
+
+
+
+
+
+
+
+
+ ..\packages\Unosquare.Raspberry.Abstractions.0.4.1\lib\netstandard2.0\Unosquare.Raspberry.Abstractions.dll
+
+
+ ..\packages\Unosquare.Raspberry.IO.0.27.1\lib\netstandard2.0\Unosquare.RaspberryIO.dll
+
+
+ ..\packages\Unosquare.WiringPi.0.5.1\lib\netstandard2.0\Unosquare.WiringPi.dll
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/WaveshareUARTFingerprintSensor/packages.config b/WaveshareUARTFingerprintSensor/packages.config
new file mode 100644
index 0000000..e93a0bf
--- /dev/null
+++ b/WaveshareUARTFingerprintSensor/packages.config
@@ -0,0 +1,9 @@
+
+
+
+
+
+
+
+
+
\ No newline at end of file