Fix some bt device issues

 - Don't allow adjusting volume if there's no device
 - Cap bt nvs values correctly
 - Persist bt volumes correctly even when the encoded for has a null
   byte (facepalm 4 me)

1 files changed, 2 insertions, 2 deletions

diff --git a/src/audio/bt_audio_output.cpp b/src/audio/bt_audio_output.cpp
index 8f2b8cf3..229a38bb 100644
--- a/src/audio/bt_audio_output.cpp
+++ b/src/audio/bt_audio_output.cpp
@@ -90,7 +90,7 @@ auto BluetoothAudioOutput::SetVolumeDb(int_fast16_t val) -> bool {
 }
 
 auto BluetoothAudioOutput::AdjustVolumeUp() -> bool {
-  if (volume_ == 100) {
+  if (volume_ == 100 || !bluetooth_.IsConnected()) {
     return false;
   }
   volume_++;
@@ -99,7 +99,7 @@ auto BluetoothAudioOutput::AdjustVolumeUp() -> bool {
 }
 
 auto BluetoothAudioOutput::AdjustVolumeDown() -> bool {
-  if (volume_ == 0) {
+  if (volume_ == 0 || !bluetooth_.IsConnected()) {
     return false;
   }
   volume_--;