diff --git a/TODO.md b/TODO.md
index ae44edc42..c471038ad 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,7 +1,7 @@
 
 * test reg reading/writing directly via bt to device
 * fix bluetooth update
-* add broadcasters for use by signal
+* add broadcasters for use by signal (node changes and packet received)
 * make test implementation of server (doesn't use bluetooth)
 * add real messaging code/protobufs
 * use https://codelabs.developers.google.com/codelabs/jetpack-compose-basics/#4 to show service state
diff --git a/app/src/main/aidl/com/geeksville/mesh/IMeshService.aidl b/app/src/main/aidl/com/geeksville/mesh/IMeshService.aidl
index fb5640d96..b7025bd72 100644
--- a/app/src/main/aidl/com/geeksville/mesh/IMeshService.aidl
+++ b/app/src/main/aidl/com/geeksville/mesh/IMeshService.aidl
@@ -17,7 +17,7 @@ interface IMeshService {
     /**
     Get the IDs of everyone on the mesh.  You should also subscribe for NODE_CHANGE broadcasts.
     */
-    void getOnline(out String[] ids);
+    String[] getOnline();
 
     /**
     Is the packet radio currently connected to the phone?
diff --git a/app/src/main/java/com/geeksville/mesh/MeshService.kt b/app/src/main/java/com/geeksville/mesh/MeshService.kt
index 69b75827a..a2155a456 100644
--- a/app/src/main/java/com/geeksville/mesh/MeshService.kt
+++ b/app/src/main/java/com/geeksville/mesh/MeshService.kt
@@ -3,8 +3,37 @@ package com.geeksville.mesh
 import android.app.Service
 import android.content.Intent
 import android.os.IBinder
+import com.geeksville.android.Logging
 
-class MeshService : Service() {
+class MeshService : Service(), Logging {
+
+    val prefix = "com.geeksville.mesh"
+
+    /*
+    see com.geeksville.com.geeeksville.mesh broadcast intents
+    // RECEIVED_OPAQUE  for data received from other nodes
+    // NODE_CHANGE  for new IDs appearing or disappearing
+    // CONNECTION_CHANGED for losing/gaining connection to the packet radio
+     */
+    fun broadcastReceivedOpaque(senderId: String, payload: ByteArray) {
+        val intent = Intent("$prefix.RECEIVED_OPAQUE")
+        intent.putExtra("$prefix.Sender", senderId)
+        intent.putExtra("$prefix.Payload", payload)
+        sendBroadcast(intent)
+    }
+
+    fun broadcastNodeChange(nodeId: String, isOnline: Boolean) {
+        val intent = Intent("$prefix.NODE_CHANGE")
+        intent.putExtra("$prefix.Id", nodeId)
+        intent.putExtra("$prefix.Online", isOnline)
+        sendBroadcast(intent)
+    }
+
+    fun broadcastConnectionChanged(isConnected: Boolean) {
+        val intent = Intent("$prefix.CONNECTION_CHANGED")
+        intent.putExtra("$prefix.Connected", isConnected)
+        sendBroadcast(intent)
+    }
 
     override fun onBind(intent: Intent): IBinder {
         // Return the interface
@@ -12,20 +41,22 @@ class MeshService : Service() {
     }
 
     private val binder = object : IMeshService.Stub() {
-        override fun setOwner(myId: String?, longName: String?, shortName: String?) {
-            TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+        override fun setOwner(myId: String, longName: String, shortName: String) {
+            error("TODO setOwner $myId : $longName : $shortName")
         }
 
-        override fun sendOpaque(destId: String?, payload: ByteArray?) {
-            TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+        override fun sendOpaque(destId: String, payload: ByteArray) {
+            error("TODO sendOpaque $destId <- ${payload.size}")
         }
 
-        override fun getOnline(ids: Array<out String>?) {
-            TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+        override fun getOnline(): Array<String> {
+            error("TODO getOnline")
+            return arrayOf("+16508675309")
         }
 
         override fun isConnected(): Boolean {
-            TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+            error("TODO isConnected")
+            return true
         }
     }
 }
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