diff --git a/.idea/dictionaries/kevinh.xml b/.idea/dictionaries/kevinh.xml
index 9de6060e7..56d3af4f2 100644
--- a/.idea/dictionaries/kevinh.xml
+++ b/.idea/dictionaries/kevinh.xml
@@ -5,6 +5,7 @@
       <w>errormsg</w>
       <w>geeksville</w>
       <w>meshtastic</w>
+      <w>protobuf</w>
     </words>
   </dictionary>
 </component>
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 421034192..997db7e0f 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -133,7 +133,7 @@
                 <!-- The QR codes to share channel settings are shared as meshtastic URLS
 
                 an approximate example:
-                http://www.meshtastic.org/c/YXNkZnF3ZXJhc2RmcXdlcmFzZGZxd2Vy
+                http://www.meshtastic.org/d/YXNkZnF3ZXJhc2RmcXdlcmFzZGZxd2Vy
                 -->
                 <action android:name="android.intent.action.VIEW" />
 
@@ -143,11 +143,11 @@
                 <data
                     android:scheme="https"
                     android:host="www.meshtastic.org"
-                    android:pathPrefix="/c/" />
+                    android:pathPrefix="/d/" />
                 <data
                     android:scheme="https"
                     android:host="www.meshtastic.org"
-                    android:pathPrefix="/C/" />
+                    android:pathPrefix="/D/" />
             </intent-filter>
 
             <intent-filter>
diff --git a/app/src/main/java/com/geeksville/mesh/model/Channel.kt b/app/src/main/java/com/geeksville/mesh/model/Channel.kt
index 54886c7e5..d19faed8e 100644
--- a/app/src/main/java/com/geeksville/mesh/model/Channel.kt
+++ b/app/src/main/java/com/geeksville/mesh/model/Channel.kt
@@ -20,7 +20,7 @@ data class Channel(
     companion object {
         // Note: this string _SHOULD NOT BE LOCALIZED_ because it directly hashes to values used on the device for the default channel name.
         // FIXME - make this work with new channel name system
-        val defaultChannelName = "Default"
+        const val defaultChannelName = "Default"
 
         // These bytes must match the well known and not secret bytes used the default channel AES128 key device code
         val channelDefaultKey = byteArrayOfInts(
@@ -33,27 +33,8 @@ data class Channel(
             MeshProtos.ChannelSettings.newBuilder().setName(defaultChannelName)
                 .setModemConfig(MeshProtos.ChannelSettings.ModemConfig.Bw125Cr45Sf128).build()
         )
-
-        const val prefix = "https://www.meshtastic.org/c/#"
-
-        private const val base64Flags = Base64.URL_SAFE + Base64.NO_WRAP + Base64.NO_PADDING
-
-        private fun urlToSettings(url: Uri): MeshProtos.ChannelSettings {
-            val urlStr = url.toString()
-
-            // We no longer support the super old (about 0.8ish? verison of the URLs that don't use the # separator - I doubt
-            // anyone is still using that old format
-            val pathRegex = Regex("$prefix(.*)", RegexOption.IGNORE_CASE)
-            val (base64) = pathRegex.find(urlStr)?.destructured
-                ?: throw MalformedURLException("Not a meshtastic URL: ${urlStr.take(40)}")
-            val bytes = Base64.decode(base64, base64Flags)
-
-            return MeshProtos.ChannelSettings.parseFrom(bytes)
-        }
     }
 
-    constructor(url: Uri) : this(urlToSettings(url))
-
     /// Return the name of our channel as a human readable string.  If empty string, assume "Default" per mesh.proto spec
     val name: String
         get() = if (settings.name.isEmpty()) {
@@ -106,32 +87,4 @@ data class Channel(
 
             return "#${name}-${suffix}"
         }
-
-    /// Can this channel be changed right now?
-    var editable = false
-
-    /// Return an URL that represents the current channel values
-    /// @param upperCasePrefix - portions of the URL can be upper case to make for more efficient QR codes
-    fun getChannelUrl(upperCasePrefix: Boolean = false): Uri {
-        // If we have a valid radio config use it, othterwise use whatever we have saved in the prefs
-
-        val channelBytes = settings.toByteArray() ?: ByteArray(0) // if unset just use empty
-        val enc = Base64.encodeToString(channelBytes, base64Flags)
-
-        val p = if(upperCasePrefix)
-            prefix.toUpperCase()
-        else
-            prefix
-        return Uri.parse("$p$enc")
-    }
-
-    fun getChannelQR(): Bitmap {
-        val multiFormatWriter = MultiFormatWriter()
-
-        // We encode as UPPER case for the QR code URL because QR codes are more efficient for that special case
-        val bitMatrix =
-            multiFormatWriter.encode(getChannelUrl(true).toString(), BarcodeFormat.QR_CODE, 192, 192);
-        val barcodeEncoder = BarcodeEncoder()
-        return barcodeEncoder.createBitmap(bitMatrix)
-    }
 }
diff --git a/app/src/main/java/com/geeksville/mesh/model/ChannelSet.kt b/app/src/main/java/com/geeksville/mesh/model/ChannelSet.kt
new file mode 100644
index 000000000..1206af6e7
--- /dev/null
+++ b/app/src/main/java/com/geeksville/mesh/model/ChannelSet.kt
@@ -0,0 +1,75 @@
+package com.geeksville.mesh.model
+
+import android.graphics.Bitmap
+import android.net.Uri
+import android.util.Base64
+import com.geeksville.mesh.AppOnlyProtos
+import com.geeksville.mesh.MeshProtos
+import com.google.protobuf.ByteString
+import com.google.zxing.BarcodeFormat
+import com.google.zxing.MultiFormatWriter
+import com.journeyapps.barcodescanner.BarcodeEncoder
+import java.net.MalformedURLException
+
+/** Utility function to make it easy to declare byte arrays - FIXME move someplace better */
+fun byteArrayOfInts(vararg ints: Int) = ByteArray(ints.size) { pos -> ints[pos].toByte() }
+
+
+data class ChannelSet(
+    val protobuf: AppOnlyProtos.ChannelSet = AppOnlyProtos.ChannelSet.getDefaultInstance()
+) {
+    companion object {
+
+        // Placeholder when emulating
+        val emulated = ChannelSet(
+            AppOnlyProtos.ChannelSet.newBuilder().addSettings(Channel.emulated.settings).build()
+        )
+
+        const val prefix = "https://www.meshtastic.org/d/#"
+
+        private const val base64Flags = Base64.URL_SAFE + Base64.NO_WRAP + Base64.NO_PADDING
+
+        private fun urlToChannels(url: Uri): AppOnlyProtos.ChannelSet {
+            val urlStr = url.toString()
+
+            // We no longer support the super old (about 0.8ish? verison of the URLs that don't use the # separator - I doubt
+            // anyone is still using that old format
+            val pathRegex = Regex("$prefix(.*)", RegexOption.IGNORE_CASE)
+            val (base64) = pathRegex.find(urlStr)?.destructured
+                ?: throw MalformedURLException("Not a meshtastic URL: ${urlStr.take(40)}")
+            val bytes = Base64.decode(base64, base64Flags)
+
+            return AppOnlyProtos.ChannelSet.parseFrom(bytes)
+        }
+    }
+
+    constructor(url: Uri) : this(urlToChannels(url))
+
+    /// Can this channel be changed right now?
+    var editable = false
+
+    /// Return an URL that represents the current channel values
+    /// @param upperCasePrefix - portions of the URL can be upper case to make for more efficient QR codes
+    fun getChannelUrl(upperCasePrefix: Boolean = false): Uri {
+        // If we have a valid radio config use it, othterwise use whatever we have saved in the prefs
+
+        val channelBytes = protobuf.toByteArray() ?: ByteArray(0) // if unset just use empty
+        val enc = Base64.encodeToString(channelBytes, base64Flags)
+
+        val p = if(upperCasePrefix)
+            prefix.toUpperCase()
+        else
+            prefix
+        return Uri.parse("$p$enc")
+    }
+
+    fun getChannelQR(): Bitmap {
+        val multiFormatWriter = MultiFormatWriter()
+
+        // We encode as UPPER case for the QR code URL because QR codes are more efficient for that special case
+        val bitMatrix =
+            multiFormatWriter.encode(getChannelUrl(true).toString(), BarcodeFormat.QR_CODE, 192, 192);
+        val barcodeEncoder = BarcodeEncoder()
+        return barcodeEncoder.createBitmap(bitMatrix)
+    }
+}