diff --git a/software/app/Settings/ui.html b/software/app/Settings/ui.html
index 3f470a126..7a9d1d038 100644
--- a/software/app/Settings/ui.html
+++ b/software/app/Settings/ui.html
@@ -23,7 +23,6 @@
 const baudrate = 0;
 const server = "";
 const key = "";
-const adb = 0;
 const voice = 0;
 const power_save = 0;
 
@@ -42,7 +41,7 @@
       + key  + ","
       + document.getElementById("rotate").value + ","
       + document.getElementById("orientation").value + ","
-      + adb  + ","
+      + document.getElementById("adb").value + ","
       + document.getElementById("idpref").value + ","
       + document.getElementById("vmode").value + ","
       + voice  + ","
@@ -114,6 +113,13 @@
   UpdateChecksum();
 }
 
+function SelADB()
+{
+  var adb = document.getElementById("ADBs");
+  document.getElementById("adb").value = adb.options[adb.selectedIndex].value;
+  UpdateChecksum();
+}
+
 function SelIDPref()
 {
   var idpref = document.getElementById("IDPrefs");
@@ -151,6 +157,7 @@
   document.getElementById("rotate").value       = 0;
   document.getElementById("orientation").value  = 0;
   document.getElementById("zoom").value         = 2;
+  document.getElementById("adb").value          = 3;
   document.getElementById("idpref").value       = 3;
   document.getElementById("aghost").value       = 0;
   document.getElementById("filter").value       = 0;
@@ -225,6 +232,17 @@ <h1 align=center>Interface settings</h1>
 </td>
 </tr>
 
+<tr>
+<th align=left>Aircrafts data</th>
+<td align=right>
+<select id="ADBs" onchange="SelADB()">
+<option value='0'>off</option>
+<option value='2'>FlarmNet</option>
+<option selected value='3'>GliderNet</option>
+</select>
+</td>
+</tr>
+
 <tr>
 <th align=left>ID preference</th>
 <td align=right>
@@ -272,6 +290,7 @@ <h1 align=center>Interface settings</h1>
 <!-- Rotation:  --><input type="hidden" id="rotate" size="1">
 <!-- Orientation:  --><input type="hidden" id="orientation" size="1">
 <!-- Zoom:  --><input type="hidden" id="zoom" size="1">
+<!-- ADB:  --><input type="hidden" id="adb" size="1">
 <!-- IDPref:  --><input type="hidden" id="idpref" size="1">
 <!-- AGhost:  --><input hidden="text" id="aghost" size="1">
 <!-- Filter:  --><input type="hidden" id="filter" size="1">
diff --git a/software/firmware/source/SoftRF/src/platform/ESP32.cpp b/software/firmware/source/SoftRF/src/platform/ESP32.cpp
index a372ae02c..8a6573eda 100644
--- a/software/firmware/source/SoftRF/src/platform/ESP32.cpp
+++ b/software/firmware/source/SoftRF/src/platform/ESP32.cpp
@@ -1486,7 +1486,7 @@ static void ESP32_setup()
 
       axp_2xxx.setBLDO2Voltage(3300); // V2.1 - SA868
       axp_2xxx.enableBLDO2();
-      // axp_2xxx.setALDO3Voltage(3300); // V2.1 - Amp. OE Ctrl
+      axp_2xxx.setALDO3Voltage(3300); // V2.1 - Amp. OE Ctrl
 
 #if defined(USE_SA8X8)
 #if 0
@@ -1684,6 +1684,35 @@ static void ESP32_post_init()
       }
     }
   }
+
+#if !defined(EXCLUDE_VOICE_MESSAGE)
+  if (esp32_board == ESP32_LILYGO_T_TWR_V2_1 && uSD_is_attached)
+  {
+    char filename[MAX_FILENAME_LEN];
+    strcpy(filename, WAV_FILE_PREFIX);
+    strcat(filename, "POST");
+    strcat(filename, WAV_FILE_SUFFIX);
+    if (uSD.exists(filename)) {
+      axp_2xxx.enableALDO3();
+      Audio_Sink->SetPinout(I2S_PIN_NO_CHANGE,
+                            I2S_PIN_NO_CHANGE,
+                            SOC_GPIO_PIN_TWR2_PDM_AUX,
+                            I2S_PIN_NO_CHANGE);
+      Audio_Sink->SetGain(/* 0.0625 */ 0.125 /* 0.25 */);
+
+      play_file(filename);
+
+      axp_2xxx.disableALDO3();
+      I2S_Init((i2s_mode_t) (I2S_MODE_TX | I2S_MODE_PDM),
+                I2S_BITS_PER_SAMPLE_16BIT);
+      Audio_Sink->SetPinout(I2S_PIN_NO_CHANGE,
+                            I2S_PIN_NO_CHANGE,
+                            SOC_GPIO_PIN_TWR2_PDM_OUT,
+                            I2S_PIN_NO_CHANGE);
+      Audio_Sink->SetGain(/* 0.0625 */ 0.125 /* 0.25 */);
+    }
+  }
+#endif /* EXCLUDE_VOICE_MESSAGE */
 #endif /* CONFIG_IDF_TARGET_ESP32S3 */
 
   Serial.println();
diff --git a/software/firmware/source/SoftRF/src/platform/iomap/LilyGO_TTWR.h b/software/firmware/source/SoftRF/src/platform/iomap/LilyGO_TTWR.h
index e92cca640..ad6f13813 100644
--- a/software/firmware/source/SoftRF/src/platform/iomap/LilyGO_TTWR.h
+++ b/software/firmware/source/SoftRF/src/platform/iomap/LilyGO_TTWR.h
@@ -20,8 +20,8 @@
 
 // Radio SPI (not in use)
 #define SOC_GPIO_PIN_TWR2_MOSI          16
-#define SOC_GPIO_PIN_TWR2_MISO          45
-#define SOC_GPIO_PIN_TWR2_SCK           15
+#define SOC_GPIO_PIN_TWR2_MISO          45 /* T-TWR 2.0 only */
+#define SOC_GPIO_PIN_TWR2_SCK           15 /* T-TWR 2.0 only */
 #define SOC_GPIO_PIN_TWR2_SS            14
 
 // microSD
@@ -43,3 +43,6 @@
 #define SOC_GPIO_PIN_TWR2_ENC_A         47
 #define SOC_GPIO_PIN_TWR2_ENC_B         46
 
+/* T-TWR 2.1 only */
+#define SOC_GPIO_PIN_TWR2_PDM_AUX       45
+#define SOC_GPIO_PIN_TWR2_MIC_ADC       15