init

app/build.gradle.kts

@@ -0,0 +1,60 @@
+plugins {
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.kotlin.android)
+    alias(libs.plugins.kotlin.compose)
+}
+
+android {
+    namespace = "ch.mathieubroillet.djiffchack"
+    compileSdk = 35
+
+    defaultConfig {
+        applicationId = "ch.mathieubroillet.djiffchack"
+        minSdk = 26
+        targetSdk = 35
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_11
+        targetCompatibility = JavaVersion.VERSION_11
+    }
+    kotlinOptions {
+        jvmTarget = "11"
+    }
+    buildFeatures {
+        compose = true
+    }
+}
+
+dependencies {
+    implementation("com.github.mik3y:usb-serial-for-android:3.8.1")
+
+    implementation(libs.androidx.core.ktx)
+    implementation(libs.androidx.lifecycle.runtime.ktx)
+    implementation(libs.androidx.activity.compose)
+    implementation(platform(libs.androidx.compose.bom))
+    implementation(libs.androidx.ui)
+    implementation(libs.androidx.ui.graphics)
+    implementation(libs.androidx.ui.tooling.preview)
+    implementation(libs.androidx.material3)
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.androidx.junit)
+    androidTestImplementation(libs.androidx.espresso.core)
+    androidTestImplementation(platform(libs.androidx.compose.bom))
+    androidTestImplementation(libs.androidx.ui.test.junit4)
+    debugImplementation(libs.androidx.ui.tooling)
+    debugImplementation(libs.androidx.ui.test.manifest)
+}

app/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/ch/mathieubroillet/djiffchack/ExampleInstrumentedTest.kt

@@ -0,0 +1,24 @@
+package ch.mathieubroillet.djiffchack
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("ch.mathieubroillet.djiffchack", appContext.packageName)
+    }
+}

app/src/main/AndroidManifest.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <uses-feature android:name="android.hardware.usb.host" android:required="false"/>
+    <uses-feature android:name="android.hardware.usb.accessory" android:required="true"/>
+
+    <uses-permission android:name="android.permission.USB_PERMISSION" />
+
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Djiffchack"
+        tools:targetApi="31">
+
+        <uses-library android:name="com.android.future.usb.accessory"/>
+
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.Djiffchack">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+<!--            <intent-filter>-->
+<!--                <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"/>-->
+<!--            </intent-filter>-->
+<!--            <meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" android:resource="@xml/device_filter"/>-->
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/ch/mathieubroillet/djiffchack/Constants.kt

@@ -0,0 +1,9 @@
+package ch.mathieubroillet.djiffchack
+
+class Constants {
+    companion object {
+//        const val INTENT_ACTION_GRANT_USB_ACCESSORY = "ch.mathieubroillet.djiffchack.USB_ACCESSORY_PERMISSION"
+//        const val INTENT_ACTION_GRANT_USB_DEVICE = "ch.mathieubroillet.djiffchack.USB_DEVICE_PERMISSION"
+        const val INTENT_ACTION_GRANT_USB_PERMISSION = "ch.mathieubroillet.djiffchack.USB_PERMISSION"
+    }
+}

app/src/main/java/ch/mathieubroillet/djiffchack/MainActivity.kt

@@ -0,0 +1,279 @@
+package ch.mathieubroillet.djiffchack
+
+import android.app.PendingIntent
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.hardware.usb.UsbDevice
+import android.hardware.usb.UsbDeviceConnection
+import android.hardware.usb.UsbManager
+import android.os.Bundle
+import android.util.Log
+import android.widget.Toast
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Build
+import androidx.compose.material.icons.filled.MoreVert
+import androidx.compose.material.icons.filled.Refresh
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.core.content.ContextCompat
+import ch.mathieubroillet.djiffchack.ui.theme.DJI_FCC_HACK_Theme
+import com.hoho.android.usbserial.driver.CdcAcmSerialDriver
+import com.hoho.android.usbserial.driver.ProbeTable
+import com.hoho.android.usbserial.driver.UsbSerialPort
+import com.hoho.android.usbserial.driver.UsbSerialProber
+
+
+class MainActivity : ComponentActivity() {
+    private lateinit var usbManager: UsbManager
+    private var usbConnection by mutableStateOf(null as UsbDeviceConnection?)
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        usbManager = getSystemService(Context.USB_SERVICE) as UsbManager
+
+        // Register receiver to detect USB plug/unplug events
+        val filter = IntentFilter().apply {
+            addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED)
+            addAction(UsbManager.ACTION_USB_DEVICE_DETACHED)
+            addAction(Constants.INTENT_ACTION_GRANT_USB_PERMISSION)
+        }
+        ContextCompat.registerReceiver(
+            this,
+            usbReceiver,
+            filter,
+            ContextCompat.RECEIVER_NOT_EXPORTED
+        )
+
+        // Initial check for USB connection
+        refreshUsbConnection()
+
+        setContent {
+            MainScreen(usbConnection != null, ::refreshUsbConnection, ::sendPatch)
+        }
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        unregisterReceiver(usbReceiver)
+    }
+
+    /**
+     * Refreshes the USB connection status
+     */
+    private fun refreshUsbConnection() {
+        if (usbManager.deviceList.isNotEmpty()) {
+            val device: UsbDevice = usbManager.deviceList.values.first()
+            usbConnection = usbManager.openDevice(device)
+
+            if (usbConnection == null) {
+                Log.d("USB_CONNECTION", "Requesting USB Permission")
+                requestUsbPermission(device)
+            }
+        } else {
+            usbConnection = null
+        }
+    }
+
+    /**
+     * Handles sending the patch via USB communication
+     */
+    private fun sendPatch() {
+        if (usbConnection == null) {
+            Toast.makeText(this, "No USB device connected!", Toast.LENGTH_SHORT).show()
+            return
+        }
+
+        for (device in usbManager.deviceList.values) {
+            try {
+                val probeTable = ProbeTable()
+                probeTable.addProduct(11427, 4128, CdcAcmSerialDriver::class.java)
+                probeTable.addProduct(5840, 2174, CdcAcmSerialDriver::class.java)
+
+                val usbSerialProber = UsbSerialProber(probeTable)
+                val usbSerialPort = usbSerialProber.probeDevice(device).ports.firstOrNull()
+
+                if (usbSerialPort == null) {
+                    Toast.makeText(this, "No serial port found", Toast.LENGTH_SHORT).show()
+                    return
+                }
+
+                usbSerialPort.open(usbConnection)
+                usbSerialPort.setParameters(19200, 8, 1, UsbSerialPort.PARITY_NONE)
+                usbSerialPort.write(
+                    byteArrayOf(85, 13, 4, 33, 42, 31, 0, 0, 0, 0, 1, -122, 32),
+                    1000
+                )
+                usbSerialPort.write(
+                    byteArrayOf(
+                        85, 24, 4, 32, 2, 9, 0, 0, 64, 9, 39, 0, 2, 72, 0, -1, -1, 2, 0, 0, 0, 0,
+                        -127, 31
+                    ), 1000
+                )
+                usbSerialPort.close()
+            } catch (e: Exception) {
+                Log.e("USB_PATCH", "Error sending patch: ${e.message}")
+                Toast.makeText(this, "Patch failed: ${e.message}", Toast.LENGTH_SHORT).show()
+            }
+        }
+    }
+
+    /**
+     * Requests USB permission for the device
+     */
+    private fun requestUsbPermission(device: UsbDevice) {
+        val permissionIntent = PendingIntent.getBroadcast(
+            this,
+            0,
+            Intent(Constants.INTENT_ACTION_GRANT_USB_PERMISSION).apply { setPackage(packageName) },
+            PendingIntent.FLAG_MUTABLE
+        )
+
+        usbManager.requestPermission(device, permissionIntent)
+    }
+
+
+    /**
+     * BroadcastReceiver to handle USB events
+     */
+    private val usbReceiver = object : BroadcastReceiver() {
+        override fun onReceive(context: Context, intent: Intent) {
+            when (intent.action) {
+                UsbManager.ACTION_USB_DEVICE_ATTACHED -> {
+                    Log.d("USB_EVENT", "USB Device Connected")
+                    refreshUsbConnection()
+                }
+
+                UsbManager.ACTION_USB_DEVICE_DETACHED -> {
+                    Log.d("USB_EVENT", "USB Device Disconnected")
+                    refreshUsbConnection()
+                }
+
+                Constants.INTENT_ACTION_GRANT_USB_PERMISSION -> {
+                    if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
+                        Log.d("USB_EVENT", "USB Permission Granted")
+                        refreshUsbConnection()
+                    }
+                }
+            }
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun MainScreen(usbConnected: Boolean, onRefresh: () -> Unit, onSendPatch: () -> Unit) {
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text("DJI FCC Hack") },
+                actions = {
+                    IconButton(onClick = onRefresh) {
+                        Icon(Icons.Default.Refresh, contentDescription = "Refresh USB Connection")
+                    }
+                    IconButton(onClick = { /* Open Settings */ }) {
+                        Icon(Icons.Default.MoreVert, contentDescription = "More Options")
+                    }
+                }
+            )
+        }
+    ) { innerPadding ->
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(innerPadding)
+                .padding(16.dp),
+            verticalArrangement = Arrangement.spacedBy(16.dp),
+            horizontalAlignment = Alignment.CenterHorizontally
+        ) {
+            // App Logo
+            Image(
+                painter = painterResource(id = R.drawable.dji_innovations_logo),
+                contentDescription = "DJI Logo",
+                modifier = Modifier.size(100.dp)
+            )
+
+            // USB Connection Status
+            Card(
+                modifier = Modifier.fillMaxWidth(),
+                shape = RoundedCornerShape(16.dp),
+                colors = CardDefaults.cardColors(
+                    containerColor = if (usbConnected) MaterialTheme.colorScheme.primaryContainer else MaterialTheme.colorScheme.errorContainer
+                )
+            ) {
+                Row(
+                    modifier = Modifier.padding(16.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.Center
+                ) {
+                    Image(
+                        painter = painterResource(id = R.drawable.usb_c_port),
+                        contentDescription = "USB Status",
+                        modifier = Modifier.size(24.dp),
+                    )
+                    Spacer(Modifier.width(8.dp))
+                    Text(
+                        text = if (usbConnected) "Remote Connected" else "Remote Not Connected",
+                        style = MaterialTheme.typography.bodyMedium
+                    )
+                }
+            }
+
+            // Send Patch Button
+            Button(
+                onClick = onSendPatch,
+                shape = RoundedCornerShape(24.dp),
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .height(56.dp),
+                enabled = usbConnected
+            ) {
+                Icon(Icons.Default.Build, contentDescription = "Patch")
+                Spacer(Modifier.width(8.dp))
+                Text("Send FCC Patch")
+            }
+        }
+    }
+}
+
+
+@Preview(showBackground = true)
+@Composable
+fun PreviewMainScreen() {
+    DJI_FCC_HACK_Theme {
+        MainScreen(usbConnected = true, onRefresh = {}, onSendPatch = {})
+    }
+}

app/src/main/java/ch/mathieubroillet/djiffchack/ui/theme/Color.kt

@@ -0,0 +1,11 @@
+package ch.mathieubroillet.djiffchack.ui.theme
+
+import androidx.compose.ui.graphics.Color
+
+val Purple80 = Color(0xFFD0BCFF)
+val PurpleGrey80 = Color(0xFFCCC2DC)
+val Pink80 = Color(0xFFEFB8C8)
+
+val Purple40 = Color(0xFF6650a4)
+val PurpleGrey40 = Color(0xFF625b71)
+val Pink40 = Color(0xFF7D5260)

app/src/main/java/ch/mathieubroillet/djiffchack/ui/theme/Theme.kt

@@ -0,0 +1,57 @@
+package ch.mathieubroillet.djiffchack.ui.theme
+
+import android.os.Build
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.material3.dynamicDarkColorScheme
+import androidx.compose.material3.dynamicLightColorScheme
+import androidx.compose.material3.lightColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.platform.LocalContext
+
+private val DarkColorScheme = darkColorScheme(
+    primary = Purple80,
+    secondary = PurpleGrey80,
+    tertiary = Pink80
+)
+
+private val LightColorScheme = lightColorScheme(
+    primary = Purple40,
+    secondary = PurpleGrey40,
+    tertiary = Pink40
+
+    /* Other default colors to override
+    background = Color(0xFFFFFBFE),
+    surface = Color(0xFFFFFBFE),
+    onPrimary = Color.White,
+    onSecondary = Color.White,
+    onTertiary = Color.White,
+    onBackground = Color(0xFF1C1B1F),
+    onSurface = Color(0xFF1C1B1F),
+    */
+)
+
+@Composable
+fun DJI_FCC_HACK_Theme(
+    darkTheme: Boolean = isSystemInDarkTheme(),
+    // Dynamic color is available on Android 12+
+    dynamicColor: Boolean = true,
+    content: @Composable () -> Unit
+) {
+    val colorScheme = when {
+        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
+            val context = LocalContext.current
+            if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
+        }
+
+        darkTheme -> DarkColorScheme
+        else -> LightColorScheme
+    }
+
+    MaterialTheme(
+        colorScheme = colorScheme,
+        typography = Typography,
+        content = content
+    )
+}

app/src/main/java/ch/mathieubroillet/djiffchack/ui/theme/Type.kt

@@ -0,0 +1,34 @@
+package ch.mathieubroillet.djiffchack.ui.theme
+
+import androidx.compose.material3.Typography
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.sp
+
+// Set of Material typography styles to start with
+val Typography = Typography(
+    bodyLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 16.sp,
+        lineHeight = 24.sp,
+        letterSpacing = 0.5.sp
+    )
+    /* Other default text styles to override
+    titleLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 22.sp,
+        lineHeight = 28.sp,
+        letterSpacing = 0.sp
+    ),
+    labelSmall = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Medium,
+        fontSize = 11.sp,
+        lineHeight = 16.sp,
+        letterSpacing = 0.5.sp
+    )
+    */
+)

app/src/main/res/drawable/dji_innovations_logo.xml

@@ -0,0 +1,15 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="46.51dp"
+    android:height="26.87dp"
+    android:viewportWidth="164.78"
+    android:viewportHeight="95.2">
+  <path
+      android:pathData="m120.64,69.13 l12.16,-50.5l-26.1,-0l-11.12,45.29c-1.61,8.83 -11.1,12.96 -17.84,13.06l-18.49,-0l-6.27,18.2l38.86,-0c9.59,-0 23.74,-4.91 28.81,-26.06"
+      android:fillColor="#ffffff"/>
+  <path
+      android:pathData="m65.86,51.32 l12.27,-51.33l26.86,-0l-13.96,58.39c-2.69,11.27 -11.07,13.98 -18.81,13.98l-61.91,-0c-6.82,-0 -12.54,-2.9 -9.44,-15.92l5.57,-23.29c2.83,-11.81 11.61,-14.51 17.96,-14.51l43.21,-0l-3.48,14.55l-22.06,-0c-3.24,-0 -5.02,0.7 -5.93,4.49l-3.56,14.87c-1.27,5.34 0.59,5.71 4.5,5.71l20.21,-0c3.7,-0 6.95,-0.23 8.56,-6.94"
+      android:fillColor="#ffffff"/>
+  <path
+      android:pathData="m138.69,18.63 l-12.64,53.73l26.09,-0l12.64,-53.73l-26.09,-0z"
+      android:fillColor="#ffffff"/>
+</vector>

app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>

app/src/main/res/drawable/ic_launcher_foreground.xml

@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>

app/src/main/res/drawable/quadcopter.xml

@@ -0,0 +1 @@
+<!-- drawable/quadcopter.xml --><vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:width="24dp" android:viewportWidth="24" android:viewportHeight="24"><path android:fillColor="#000000" android:pathData="M5.5,1C8,1 10,3 10,5.5C10,6.38 9.75,7.2 9.31,7.9L9.41,8H14.59L14.69,7.9C14.25,7.2 14,6.38 14,5.5C14,3 16,1 18.5,1C21,1 23,3 23,5.5C23,8 21,10 18.5,10C17.62,10 16.8,9.75 16.1,9.31L15,10.41V13.59L16.1,14.69C16.8,14.25 17.62,14 18.5,14C21,14 23,16 23,18.5C23,21 21,23 18.5,23C16,23 14,21 14,18.5C14,17.62 14.25,16.8 14.69,16.1L14.59,16H9.41L9.31,16.1C9.75,16.8 10,17.62 10,18.5C10,21 8,23 5.5,23C3,23 1,21 1,18.5C1,16 3,14 5.5,14C6.38,14 7.2,14.25 7.9,14.69L9,13.59V10.41L7.9,9.31C7.2,9.75 6.38,10 5.5,10C3,10 1,8 1,5.5C1,3 3,1 5.5,1M5.5,3A2.5,2.5 0 0,0 3,5.5A2.5,2.5 0 0,0 5.5,8A2.5,2.5 0 0,0 8,5.5A2.5,2.5 0 0,0 5.5,3M5.5,16A2.5,2.5 0 0,0 3,18.5A2.5,2.5 0 0,0 5.5,21A2.5,2.5 0 0,0 8,18.5A2.5,2.5 0 0,0 5.5,16M18.5,3A2.5,2.5 0 0,0 16,5.5A2.5,2.5 0 0,0 18.5,8A2.5,2.5 0 0,0 21,5.5A2.5,2.5 0 0,0 18.5,3M18.5,16A2.5,2.5 0 0,0 16,18.5A2.5,2.5 0 0,0 18.5,21A2.5,2.5 0 0,0 21,18.5A2.5,2.5 0 0,0 18.5,16M3.91,17.25L5.04,17.91C5.17,17.81 5.33,17.75 5.5,17.75A0.75,0.75 0 0,1 6.25,18.5L6.24,18.6L7.37,19.25L7.09,19.75L5.96,19.09C5.83,19.19 5.67,19.25 5.5,19.25A0.75,0.75 0 0,1 4.75,18.5L4.76,18.4L3.63,17.75L3.91,17.25M3.63,6.25L4.76,5.6L4.75,5.5A0.75,0.75 0 0,1 5.5,4.75C5.67,4.75 5.83,4.81 5.96,4.91L7.09,4.25L7.37,4.75L6.24,5.4L6.25,5.5A0.75,0.75 0 0,1 5.5,6.25C5.33,6.25 5.17,6.19 5.04,6.09L3.91,6.75L3.63,6.25M16.91,4.25L18.04,4.91C18.17,4.81 18.33,4.75 18.5,4.75A0.75,0.75 0 0,1 19.25,5.5L19.24,5.6L20.37,6.25L20.09,6.75L18.96,6.09C18.83,6.19 18.67,6.25 18.5,6.25A0.75,0.75 0 0,1 17.75,5.5L17.76,5.4L16.63,4.75L16.91,4.25M16.63,19.25L17.75,18.5A0.75,0.75 0 0,1 18.5,17.75C18.67,17.75 18.83,17.81 18.96,17.91L20.09,17.25L20.37,17.75L19.25,18.5A0.75,0.75 0 0,1 18.5,19.25C18.33,19.25 18.17,19.19 18.04,19.09L16.91,19.75L16.63,19.25Z" /></vector>

app/src/main/res/drawable/usb.xml

@@ -0,0 +1 @@
+<!-- drawable/usb.xml --><vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:width="24dp" android:viewportWidth="24" android:viewportHeight="24"><path android:fillColor="#000000" android:pathData="M15,7V11H16V13H13V5H15L12,1L9,5H11V13H8V10.93C8.7,10.56 9.2,9.85 9.2,9C9.2,7.78 8.21,6.8 7,6.8C5.78,6.8 4.8,7.78 4.8,9C4.8,9.85 5.3,10.56 6,10.93V13A2,2 0 0,0 8,15H11V18.05C10.29,18.41 9.8,19.15 9.8,20A2.2,2.2 0 0,0 12,22.2A2.2,2.2 0 0,0 14.2,20C14.2,19.15 13.71,18.41 13,18.05V15H16A2,2 0 0,0 18,13V11H19V7H15Z" /></vector>

app/src/main/res/drawable/usb_c_port.xml

@@ -0,0 +1 @@
+<!-- drawable/usb_c_port.xml --><vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:width="24dp" android:viewportWidth="24" android:viewportHeight="24"><path android:fillColor="#000000" android:pathData="M6 12H18C18.55 12 19 12.45 19 13C19 13.55 18.55 14 18 14H6C5.45 14 5 13.55 5 13C5 12.45 5.45 12 6 12M6 10C4.34 10 3 11.34 3 13C3 14.66 4.34 16 6 16H18C19.66 16 21 14.66 21 13C21 11.34 19.66 10 18 10H6M6 8H18C20.76 8 23 10.24 23 13C23 15.76 20.76 18 18 18H6C3.24 18 1 15.76 1 13C1 10.24 3.24 8 6 8Z" /></vector>

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

app/src/main/res/values/colors.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>

app/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">dji-ffc-hack</string>
+</resources>

app/src/main/res/values/themes.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="Theme.Djiffchack" parent="android:Theme.Material.Light.NoActionBar" />
+</resources>

app/src/main/res/xml/backup_rules.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample backup rules file; uncomment and customize as necessary.
+   See https://developer.android.com/guide/topics/data/autobackup
+   for details.
+   Note: This file is ignored for devices older that API 31
+   See https://developer.android.com/about/versions/12/backup-restore
+-->
+<full-backup-content>
+    <!--
+   <include domain="sharedpref" path="."/>
+   <exclude domain="sharedpref" path="device.xml"/>
+-->
+</full-backup-content>

app/src/main/res/xml/data_extraction_rules.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample data extraction rules file; uncomment and customize as necessary.
+   See https://developer.android.com/about/versions/12/backup-restore#xml-changes
+   for details.
+-->
+<data-extraction-rules>
+    <cloud-backup>
+        <!-- TODO: Use <include> and <exclude> to control what is backed up.
+        <include .../>
+        <exclude .../>
+        -->
+    </cloud-backup>
+    <!--
+    <device-transfer>
+        <include .../>
+        <exclude .../>
+    </device-transfer>
+    -->
+</data-extraction-rules>

app/src/main/res/xml/device_filter.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <usb-device
+        product-id="4128"
+        vendor-id="11427"/>
+</resources>

app/src/test/java/ch/mathieubroillet/djiffchack/ExampleUnitTest.kt

@@ -0,0 +1,17 @@
+package ch.mathieubroillet.djiffchack
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}

build.gradle.kts

@@ -0,0 +1,6 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+plugins {
+    alias(libs.plugins.android.application) apply false
+    alias(libs.plugins.kotlin.android) apply false
+    alias(libs.plugins.kotlin.compose) apply false
+}

gradle.properties

@@ -0,0 +1,23 @@
+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. For more details, visit
+# https://developer.android.com/r/tools/gradle-multi-project-decoupled-projects
+# org.gradle.parallel=true
+# AndroidX package structure to make it clearer which packages are bundled with the
+# Android operating system, and which are packaged with your app's APK
+# https://developer.android.com/topic/libraries/support-library/androidx-rn
+android.useAndroidX=true
+# Kotlin code style for this project: "official" or "obsolete":
+kotlin.code.style=official
+# Enables namespacing of each library's R class so that its R class includes only the
+# resources declared in the library itself and none from the library's dependencies,
+# thereby reducing the size of the R class for that library
+android.nonTransitiveRClass=true

gradle/libs.versions.toml

@@ -0,0 +1,33 @@
+[versions]
+agp = "8.8.0"
+kotlin = "2.0.0"
+coreKtx = "1.10.1"
+junit = "4.13.2"
+junitVersion = "1.1.5"
+espressoCore = "3.5.1"
+lifecycleRuntimeKtx = "2.6.1"
+activityCompose = "1.8.0"
+composeBom = "2024.04.01"
+
+[libraries]
+androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
+junit = { group = "junit", name = "junit", version.ref = "junit" }
+androidx-junit = { group = "androidx.test.ext", name = "junit", version.ref = "junitVersion" }
+androidx-espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version.ref = "espressoCore" }
+androidx-lifecycle-runtime-ktx = { group = "androidx.lifecycle", name = "lifecycle-runtime-ktx", version.ref = "lifecycleRuntimeKtx" }
+androidx-activity-compose = { group = "androidx.activity", name = "activity-compose", version.ref = "activityCompose" }
+androidx-compose-bom = { group = "androidx.compose", name = "compose-bom", version.ref = "composeBom" }
+androidx-ui = { group = "androidx.compose.ui", name = "ui" }
+androidx-ui-graphics = { group = "androidx.compose.ui", name = "ui-graphics" }
+androidx-ui-tooling = { group = "androidx.compose.ui", name = "ui-tooling" }
+androidx-ui-tooling-preview = { group = "androidx.compose.ui", name = "ui-tooling-preview" }
+androidx-ui-test-manifest = { group = "androidx.compose.ui", name = "ui-test-manifest" }
+androidx-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit4" }
+androidx-material3 = { group = "androidx.compose.material3", name = "material3" }
+
+
+[plugins]
+android-application = { id = "com.android.application", version.ref = "agp" }
+kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
+kotlin-compose = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin" }
+

gradlew

@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle.kts

@@ -0,0 +1,24 @@
+pluginManagement {
+    repositories {
+        google {
+            content {
+                includeGroupByRegex("com\\.android.*")
+                includeGroupByRegex("com\\.google.*")
+                includeGroupByRegex("androidx.*")
+            }
+        }
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories {
+        google()
+        mavenCentral()
+        maven(url = "https://jitpack.io")
+    }
+}
+
+rootProject.name = "dji-ffc-hack"
+include(":app")