diff --git a/project/ble_peripheral/ble_app_bladder_patch/measurement/adc121s051/dr_adc121s051.c b/project/ble_peripheral/ble_app_bladder_patch/measurement/adc121s051/dr_adc121s051.c
index 9c32c54..11ced3c 100644
--- a/project/ble_peripheral/ble_app_bladder_patch/measurement/adc121s051/dr_adc121s051.c
+++ b/project/ble_peripheral/ble_app_bladder_patch/measurement/adc121s051/dr_adc121s051.c
@@ -1348,8 +1348,8 @@ dr_adc_err_t maa_async_start(uint8_t freq_option, uint16_t delay_us, uint16_t nu
     /* capture all channels without BLE TX, then start transmission */
     g_maa_ctx.state = MAA_ASYNC_CAPTURING;
 
-    /* Warm up CH0 6 times and discard the results before the real capture starts. */
-    for (uint8_t warmup = 0; warmup < 6; warmup++)
+    /* Warm up CH0 before real capture (MAA_ASYNC_WARMUP_COUNT). */
+    for (uint8_t warmup = 0; warmup < MAA_ASYNC_WARMUP_COUNT; warmup++)
     {
         err = dr_adc_capture_channel_only(
             g_maa_ctx.freq_option,
diff --git a/project/ble_peripheral/ble_app_bladder_patch/measurement/adc121s051/dr_adc121s051.h b/project/ble_peripheral/ble_app_bladder_patch/measurement/adc121s051/dr_adc121s051.h
index fd09eea..ef31687 100644
--- a/project/ble_peripheral/ble_app_bladder_patch/measurement/adc121s051/dr_adc121s051.h
+++ b/project/ble_peripheral/ble_app_bladder_patch/measurement/adc121s051/dr_adc121s051.h
@@ -326,6 +326,11 @@ void dr_piezo_select_channel(uint8_t channel);
 #define MAA_NUM_CHANNELS    6       /* 4 -> 8 -> 6  jhChun 26.03.17*/
 #define MAA_SAMPLES_MAX     200
 
+/* CH0 warm-up captures before maa/mbb/mtb (each costs ~1 MUX settle + burst + ADC). */
+#ifndef MAA_ASYNC_WARMUP_COUNT
+#define MAA_ASYNC_WARMUP_COUNT  5U
+#endif
+
 /**
  * @brief Echo data for one channel
  */