fix channel setting

app/src/main/java/com/geeksville/mesh/MainActivity.kt

@@ -667,6 +667,9 @@ class MainActivity : AppCompatActivity(), Logging,
                             model.radioConfig.value =
                                 RadioConfigProtos.RadioConfig.parseFrom(service.radioConfig)
 
+                            model.channels.value =
+                                ChannelSet(AppOnlyProtos.ChannelSet.parseFrom(service.channels))
+
                             updateNodesFromDevice()
 
                             // we have a connection to our device now, do the channel change

app/src/main/java/com/geeksville/mesh/service/MeshService.kt

@@ -542,7 +542,10 @@ class MeshService : Service(), Logging {
                 }.build()
             }
 
-            TODO("Need to send channels to device")
+            debug("Sending channels to device")
+            asChannels.forEach {
+              setChannel(it)
+            }
 
             channels = asChannels.toTypedArray()
         }
@@ -1387,6 +1390,12 @@ class MeshService : Service(), Logging {
         })
     }
 
+    private fun setChannel(channel: ChannelProtos.Channel) {
+        sendToRadio(newMeshPacketTo(myNodeNum).buildAdminPacket(wantResponse = true) {
+            setChannel = channel
+        })
+    }
+
     /**
      * Start the modern (REV2) API configuration flow
      */

app/src/main/java/com/geeksville/mesh/ui/ChannelFragment.kt

@@ -78,7 +78,6 @@ class ChannelFragment : ScreenFragment("Channel"), Logging {
 
     /// Pull the latest data from the model (discarding any user edits)
     private fun setGUIfromModel() {
-        val radioConfig = model.radioConfig.value
         val channels = model.channels.value
 
         binding.editableCheckbox.isChecked = false // start locked
@@ -231,7 +230,7 @@ class ChannelFragment : ScreenFragment("Channel"), Logging {
             shareChannel()
         }
 
-        model.radioConfig.observe(viewLifecycleOwner, {
+        model.channels.observe(viewLifecycleOwner, {
             setGUIfromModel()
         })