diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 782380cc9..e14921688 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -24,6 +24,9 @@
      -->
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 
+    <!-- Only for debug log writing, disable for production FIXME -->
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+
     <uses-feature
         android:name="android.hardware.bluetooth_le"
         android:required="true" />
diff --git a/app/src/main/java/com/geeksville/mesh/MainActivity.kt b/app/src/main/java/com/geeksville/mesh/MainActivity.kt
index 8e5f3ef1c..c78198be6 100644
--- a/app/src/main/java/com/geeksville/mesh/MainActivity.kt
+++ b/app/src/main/java/com/geeksville/mesh/MainActivity.kt
@@ -57,7 +57,8 @@ class MainActivity : AppCompatActivity(), Logging {
             Manifest.permission.ACCESS_BACKGROUND_LOCATION,
             Manifest.permission.BLUETOOTH,
             Manifest.permission.BLUETOOTH_ADMIN,
-            Manifest.permission.WAKE_LOCK
+            Manifest.permission.WAKE_LOCK,
+            Manifest.permission.WRITE_EXTERNAL_STORAGE
         )
 
         val missingPerms = perms.filter {
diff --git a/app/src/main/java/com/geeksville/mesh/RadioInterfaceService.kt b/app/src/main/java/com/geeksville/mesh/RadioInterfaceService.kt
index 6257bb1ee..8124090de 100644
--- a/app/src/main/java/com/geeksville/mesh/RadioInterfaceService.kt
+++ b/app/src/main/java/com/geeksville/mesh/RadioInterfaceService.kt
@@ -3,6 +3,7 @@ package com.geeksville.mesh
 import android.content.Context
 import android.content.Intent
 import androidx.core.app.JobIntentService
+import com.geeksville.android.DebugLogFile
 import com.geeksville.android.Logging
 
 const val EXTRA_CONNECTED = "$prefix.Connected"
@@ -59,6 +60,8 @@ class RadioInterfaceService : JobIntentService(), Logging {
         }
     }
 
+    val sentPacketsLog = DebugLogFile(this, "sent_log.json")
+
     private fun broadcastReceivedFromRadio(payload: ByteArray) {
         val intent = Intent(RECEIVE_FROMRADIO_ACTION)
         intent.putExtra("$prefix.Payload", payload)
@@ -73,7 +76,11 @@ class RadioInterfaceService : JobIntentService(), Logging {
 
     /// Send a packet/command out the radio link
     private fun sendToRadio(p: ByteArray) {
-        info("Simulating sending to radio size=$p.size")
+
+        // For debugging/logging purposes ONLY we convert back into a protobuf for readability
+        val proto = MeshProtos.ToRadio.parseFrom(p)
+        info("TODO sending to radio: $proto")
+        sentPacketsLog.log("FIXME JSON")
     }
 
     // Handle an incoming packet from the radio, broadcasts it as an android intent
@@ -81,6 +88,11 @@ class RadioInterfaceService : JobIntentService(), Logging {
         broadcastReceivedFromRadio(p)
     }
 
+    override fun onDestroy() {
+        sentPacketsLog.close()
+        super.onDestroy()
+    }
+
     override fun onHandleWork(intent: Intent) { // We have received work to do.  The system or framework is already
         // holding a wake lock for us at this point, so we can just go.
         debug("Executing work: $intent")