Added the debug.keystore to the repo so that I can move between devices and build the app without getting installation errors on the phone.

Also updated the testModelActivity to a more robust USB connection permissions testing and connection testing....

.idea/misc.xml

@@ -1,4 +1,3 @@
-<?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
   <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="jbr-21" project-jdk-type="JavaSDK">

app/.gitignore

@@ -44,7 +44,7 @@ captures/
 
 # Keystore files (NEVER commit these!)
 *.jks
-*.keystore
+# *.keystore
 *.pem
 
 # OS-specific files

app/build.gradle.kts

@@ -7,12 +7,22 @@ android {
     namespace = "net.mmanningau.speechtokeyboard"
     compileSdk = 36
 
+    signingConfigs {
+        getByName("debug") {
+            // This tells Gradle to look for the key in the same folder as this build file
+            storeFile = file("debug.keystore")
+            storePassword = "android"
+            keyAlias = "androiddebugkey"
+            keyPassword = "android"
+        }
+    }
+
     defaultConfig {
         applicationId = "net.mmanningau.speechtokeyboard"
         minSdk = 28
         targetSdk = 36
-        versionCode = 12
+        versionCode = 13
-        versionName = "1.1"
+        versionName = "1.1.1"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -29,6 +39,8 @@ android {
             applicationIdSuffix = ".streaming"
             // This changes the app name on your homescreen to "MyApp (Dev)"
             resValue("string", "app_name", "Speech To Keyboard (Streaming)")
+            // Explicitly tell the debug build to use the config we defined above
+            signingConfig = signingConfigs["debug"]
         }
     }
     compileOptions {

app/src/main/java/net/mmanningau/speechtokeyboard/TestModelActivity.kt

@@ -48,6 +48,7 @@ class TestModelActivity : AppCompatActivity() {
 
     // USB Components
     private var usbPort: UsbSerialPort? = null
+    private val ACTION_USB_PERMISSION = "net.mmanningau.speechtokeyboard.USB_PERMISSION"
 
     // Text History
     private var committedText = ""
@@ -260,26 +261,51 @@ class TestModelActivity : AppCompatActivity() {
     }
 
     // ----------------------------------------------------------------
-    // 3. USB LOGIC (Unchanged from before)
+    // REVISED USB LOGIC (With Permission Request)
     // ----------------------------------------------------------------
     private fun connectToPico() {
         val usbManager = getSystemService(Context.USB_SERVICE) as UsbManager
+
+        // Find the driver
         val availableDrivers = UsbSerialProber.getDefaultProber().findAllDrivers(usbManager)
-        if (availableDrivers.isEmpty()) return
+        if (availableDrivers.isEmpty()) {
-
+            outputText.append("\n> No USB Device Found")
-        val driver = availableDrivers[0]
+            return
-        val connection = usbManager.openDevice(driver.device) ?: return
-
-        usbPort = driver.ports[0]
-        try {
-            usbPort?.open(connection)
-            usbPort?.setParameters(115200, 8, UsbSerialPort.STOPBITS_1, UsbSerialPort.PARITY_NONE)
-            outputText.append("\n> USB Connected")
-        } catch (e: Exception) {
-            outputText.append("\n> USB Error: ${e.message}")
         }
+        val driver = availableDrivers[0]
+
+        // CHECK PERMISSION
+        if (!usbManager.hasPermission(driver.device)) {
+            outputText.append("\n> Requesting Permission...")
+            val pendingIntent = android.app.PendingIntent.getBroadcast(
+                this,
+                0,
+                android.content.Intent(ACTION_USB_PERMISSION),
+                android.app.PendingIntent.FLAG_IMMUTABLE
+            )
+            usbManager.requestPermission(driver.device, pendingIntent)
+            return
+        }
+
+        // OPEN DEVICE
+        openUsbDevice(driver, usbManager)
     }
 
+    private fun openUsbDevice(driver: com.hoho.android.usbserial.driver.UsbSerialDriver, manager: UsbManager) {
+        try {
+            val connection = manager.openDevice(driver.device) ?: return
+            usbPort = driver.ports[0]
+            usbPort?.open(connection)
+
+            // CRITICAL: MATCHING BAUD RATE
+            // We are sticking with 115200. You MUST update your Pico code to match this.
+            usbPort?.setParameters(115200, 8, UsbSerialPort.STOPBITS_1, UsbSerialPort.PARITY_NONE)
+
+            outputText.append("\n> USB Connected (115200)!")
+        } catch (e: Exception) {
+            outputText.append("\n> Connection Failed: ${e.message}")
+        }
+    }
     private fun sendToPico(text: String) {
         if (usbPort == null) return
         try {