DuoPinball just presents itself as a serial port, at which point it was fairly simple to figure out what each piece of data it sent represented.
The whole program is relatively short, simple and probably doing something fundamentally wrong as I am not at all familiar with coding for Windows. 
Code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO.Ports;
using System.Linq;
using System.Management;
using System.Text;
using System.Threading;
using System.Windows.Forms;
using WindowsInput;
namespace Duo_Pinball
{
public partial class Form1 : Form
{
string serialport = null;
int plungerval = 0;
public Form1()
{
InitializeComponent();
}
public void Form1_Load(object sender, EventArgs e)
{
}
public void ConnectSerial()
{
ResetLog();
if (String.IsNullOrEmpty(serialport))
{
UpdateStatus("Searching for Duo Pinball, please wait...");
serialport = null;
try
{
ManagementObjectSearcher searcher = new ManagementObjectSearcher("root\\CIMV2", "SELECT DeviceID,PNPDeviceID,Caption from Win32_SerialPort");
foreach (ManagementObject queryObj in searcher.Get())
{
UpdateLog(queryObj["DeviceID"].ToString() + "\t" + queryObj["Caption"].ToString());
//Search for the DuoPin VID/PID string
if (queryObj["PNPDeviceID"].ToString().Contains("VID&00010039_PID&5035"))
{
serialport = queryObj["DeviceID"].ToString();
UpdateStatus("Paired on " + queryObj["Caption"].ToString());
UpdateLog("Duo Pinball found paired to "+serialport);
break;
}
}
}
catch (ManagementException error)
{
UpdateLog("Unable to read list of COM ports from WMI: " + error.Message);
}
}
if (String.IsNullOrEmpty(serialport))
{
UpdateLog("Unable to find Duo Pinball COM port, please ensure it is paired with Bluetooth before launching this application.");
}
else
{
SerialPort mySerialPort = new SerialPort(serialport);
mySerialPort.BaudRate = 9600;
mySerialPort.Parity = Parity.None;
mySerialPort.StopBits = StopBits.One;
mySerialPort.DataBits = 8;
mySerialPort.Handshake = Handshake.None;
mySerialPort.DataReceived += new SerialDataReceivedEventHandler(DataReceivedHandler);
try
{
UpdateLog("Opening serial port "+serialport);
mySerialPort.Open();
ButtonText("Reconnect");
UpdateLog("Duo Pinball should now be working, you can see if the buttons are working or not above.\rIn games the flippers are mapped to left and right shift, the plunger button is mapped to Enter. Analog plunger is not (yet) supported.");
}
catch
{
UpdateLog("Unable to open serial port, please ensure Duo Pinball is awake and in range and try again.\rIf this happens and it took a long time to find the Duo Pinball COM port it often means the controller has locked up, try removing and re-inserting the batteries.");
ButtonText("Retry");
}
}
}
public void DataReceivedHandler(object sender, SerialDataReceivedEventArgs e)
{
SerialPort sp = (SerialPort)sender;
string indata = sp.ReadExisting();
char[] CharArray = indata.ToCharArray();
byte[] ByteArray = new byte[CharArray.Length];
// Convert ASCII string to HEX
for (int i = 0; i < CharArray.Length; i++)
{
ByteArray[i] = Convert.ToByte(CharArray[i]);
ByteArray[i] += 0x30;
}
string outdata = "";
for (int i = 0; i < CharArray.Length; i++)
{
outdata += ByteArray[i] + " ";
}
// If the first two digits are correct then interpret the command
if (ByteArray.Length > 3 && ByteArray[0] == 138 && ByteArray[1] == 111)
{
if (ByteArray[2] == 49)
{
// Flippers
if (ByteArray[3] == 48)
{
// Flippers Released
InputSimulator.SimulateKeyUp(VirtualKeyCode.LSHIFT);
InputSimulator.SimulateKeyUp(VirtualKeyCode.RSHIFT);
LeftFlipper(false);
RightFlipper(false);
}
else if (ByteArray[3] == 49)
{
// Left Flipper
InputSimulator.SimulateKeyDown(VirtualKeyCode.LSHIFT);
InputSimulator.SimulateKeyUp(VirtualKeyCode.RSHIFT);
LeftFlipper(true);
RightFlipper(false);
}
else if (ByteArray[3] == 50)
{
// Right Flipper
InputSimulator.SimulateKeyUp(VirtualKeyCode.LSHIFT);
InputSimulator.SimulateKeyDown(VirtualKeyCode.RSHIFT);
LeftFlipper(false);
RightFlipper(true);
}
else if (ByteArray[3] == 51)
{
// Both Flippers
InputSimulator.SimulateKeyDown(VirtualKeyCode.LSHIFT);
InputSimulator.SimulateKeyDown(VirtualKeyCode.RSHIFT);
LeftFlipper(true);
RightFlipper(true);
}
}
else if (ByteArray[2] == 50)
{
if (ByteArray[5] == 49)
{
// Ball Launcher Button
Plunger(0);
if (plungerval != 0)
{
plungerval = 0;
InputSimulator.SimulateKeyPress(VirtualKeyCode.RETURN);
}
}
else
{
plungerval = ByteArray[3] - 47;
Plunger(plungerval);
}
}
else
{
UpdateLog("Unknown Command: "+outdata+" ignored.");
}
}
else
{
UpdateLog("Garbage received: " + outdata + " ignored.");
}
}
private void button1_Click(object sender, EventArgs e)
{
ConnectSerial();
}
}
}
Its so incredibly simple that its a shame Pinball Arcade doesn't support it natively so the plunger worked properly.
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Originally Posted by Alex Atkin UK
