diff --git a/project/ble_peripheral/ble_app_bladder_patch/command/cmd_table.c b/project/ble_peripheral/ble_app_bladder_patch/command/cmd_table.c
index 632361a..ee856e1 100644
--- a/project/ble_peripheral/ble_app_bladder_patch/command/cmd_table.c
+++ b/project/ble_peripheral/ble_app_bladder_patch/command/cmd_table.c
@@ -49,6 +49,7 @@ static const CmdEntry m_cmd_table[] = {
     { "mec?", true, Cmd_mec },
     { "maa?", true, Cmd_maa },
     { "mbb?", true, Cmd_mbb },
+    { "mab?", true, Cmd_mab }, // B-Mode Test
     { "mtb?", true, Cmd_mtb },
     { "mcf?", true, Cmd_mcf },
     { "mcs?", true, Cmd_mcs },
diff --git a/project/ble_peripheral/ble_app_bladder_patch/command/handlers/cmd_piezo.c b/project/ble_peripheral/ble_app_bladder_patch/command/handlers/cmd_piezo.c
index b479e63..6c1511e 100644
--- a/project/ble_peripheral/ble_app_bladder_patch/command/handlers/cmd_piezo.c
+++ b/project/ble_peripheral/ble_app_bladder_patch/command/handlers/cmd_piezo.c
@@ -16,12 +16,18 @@
 #include "cmd_sensor.h"           /* all_sensors() */
 #include "dr_piezo.h"
 #include "dr_adc121s051.h"
+#include "led_control.h"
 
 static void mtb_send_rim_after_piezo(void)
 {
     send_imu_rim_fifo();
 }
 
+static void mab_led_off_after_piezo(void)
+{
+    led_set_state(LED_STATE_OFF);
+}
+
 /*------------------------------------------------------------------------------
  * Internal clamp helpers for persisted piezo configuration
  *----------------------------------------------------------------------------*/
@@ -414,6 +420,57 @@ int Cmd_mtb(const ParsedCmd *cmd)
     return 1;
 }
 
+/*==============================================================================
+ * mab? -> reb:+raa:  6-channel asynchronous full capture + GR LED
+ *
+ * Request:  [TAG 4B "mab?"] [CRC 2B]
+ * Response: per channel  reb: [num_samples 2B] [raw_data...]
+ *           final         raa: [status 2B]
+ * Error:    raa: + 0xFFFE        (previous capture in progress)
+ *           raa: + (0xFF00|err)  (start failed)
+ *
+ * For B-Mode Test
+ *============================================================================*/
+int Cmd_mab(const ParsedCmd *cmd)
+{
+    dr_adc_err_t err;
+    (void)cmd;
+
+    if (maa_async_is_busy())
+    {
+        dr_ble_return_1("raa:", 0xFFFE);
+        return 1;
+    }
+
+    led_set_state(LED_STATE_ALIGN_COMPLETE);
+
+    err = maa_async_start(
+        m_config.piezo_freq_option,
+        m_config.piezo_delay_us,
+        m_config.piezo_num_samples,
+        m_config.piezo_cycles,
+        m_config.piezo_averaging,
+        ble_bin_buffer
+    );
+
+    if (err != DR_ADC_OK)
+    {
+        if (g_plat.log)
+        {
+            g_plat.log("[Cmd_mab] start failed err=%d\r\n", err);
+        }
+        single_format_data(ble_bin_buffer, "raa:", (uint16_t)(0xFF00 | err));
+        dr_binary_tx_safe(ble_bin_buffer, 3);
+        dr_piezo_power_off();
+        led_set_state(LED_STATE_OFF);
+        return 1;
+    }
+
+    maa_async_set_on_complete(mab_led_off_after_piezo);
+
+    return 1;
+}
+
 /*==============================================================================
  * mcf? -> rcf:  Read piezo parameters from FDS
  *
diff --git a/project/ble_peripheral/ble_app_bladder_patch/command/handlers/cmd_piezo.h b/project/ble_peripheral/ble_app_bladder_patch/command/handlers/cmd_piezo.h
index bca7bb9..85f33a2 100644
--- a/project/ble_peripheral/ble_app_bladder_patch/command/handlers/cmd_piezo.h
+++ b/project/ble_peripheral/ble_app_bladder_patch/command/handlers/cmd_piezo.h
@@ -12,6 +12,7 @@ int Cmd_mpc(const ParsedCmd *cmd);   /* mpc? -> rpc:  burst generation */
 int Cmd_mec(const ParsedCmd *cmd);   /* mec? -> reb:+raa:  single-channel capture */
 int Cmd_maa(const ParsedCmd *cmd);   /* maa? -> reb:+raa:  6-channel async capture */
 int Cmd_mbb(const ParsedCmd *cmd);   /* mbb? -> rbb:+reb:+raa:  sensors + capture */
+int Cmd_mab(const ParsedCmd *cmd);   /* mab? -> reb:+raa:  6-channel async capture + green LED */
 int Cmd_mtb(const ParsedCmd *cmd);   /* mtb? -> reb:+raa:+rim:  piezo + IMU FIFO (no rbb:) */
 int Cmd_mcf(const ParsedCmd *cmd);   /* mcf? -> rcf:  read piezo parameters */
 int Cmd_mcs(const ParsedCmd *cmd);   /* mcs? -> rcs:  write piezo parameters */