amazon fire requires a longer delay for the nasty BLE force-refresh hack

app/build.gradle

@@ -17,8 +17,8 @@ android {
         applicationId "com.geeksville.mesh"
         minSdkVersion 21 // The oldest emulator image I have tried is 22 (though 21 probably works)
         targetSdkVersion 29
-        versionCode 10795 // format is Mmmss (where M is 1+the numeric major number
-        versionName "0.7.95"
+        versionCode 10796 // format is Mmmss (where M is 1+the numeric major number
+        versionName "0.7.96"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     buildTypes {

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

@@ -193,6 +193,8 @@ class BluetoothInterface(val service: RadioInterfaceService, val address: String
 
     // NRF52 targets do not need the nasty force refresh hack that ESP32 needs (because they keep their
     // BLE handles stable.  So turn the hack off for these devices.  FIXME - find a better way to know that the board is NRF52 based
+    // and Amazon fire devices seem to not need this hack either
+    // Build.MANUFACTURER != "Amazon" &&
     private var needForceRefresh = !address.startsWith("FD:10:04")
 
     init {
@@ -415,7 +417,9 @@ class BluetoothInterface(val service: RadioInterfaceService, val address: String
             if (needForceRefresh) { // Our ESP32 code doesn't properly generate "service changed" indications.  Therefore we need to force a refresh on initial start
                 //needForceRefresh = false // In fact, because of tearing down BLE in sleep on the ESP32, our handle # assignments are not stable across sleep - so we much refetch every time
                 forceServiceRefresh() // this article says android should not be caching, but it does on some phones: https://punchthrough.com/attribute-caching-in-ble-advantages-and-pitfalls/
-                delay(200) // From looking at the android C code it seems that we need to give some time for the refresh message to reach that worked _before_ we try to set mtu/get services
+                
+                delay(500) // From looking at the android C code it seems that we need to give some time for the refresh message to reach that worked _before_ we try to set mtu/get services
+                // 200ms was not enough on an Amazon Fire
             }
 
             // we begin by setting our MTU size as high as it can go (if we can)

geeksville-androidlib

@@ -1 +1 @@
-Subproject commit cfe31d66e4de324fa91a2978a76ffcfba5e01085
+Subproject commit bdb2685aefd04791d62f018e9299173ec3002a6c