diff --git a/components/hal/esp32c2/include/hal/uart_ll.h b/components/hal/esp32c2/include/hal/uart_ll.h
index 7c5e3d12ed..498071aba9 100644
--- a/components/hal/esp32c2/include/hal/uart_ll.h
+++ b/components/hal/esp32c2/include/hal/uart_ll.h
@@ -708,8 +708,6 @@ FORCE_INLINE_ATTR void uart_ll_set_mode_rs485_app_ctrl(uart_dev_t *hw)
     hw->conf0.irda_en = 0;
     hw->conf0.sw_rts = 0;
     hw->conf0.irda_en = 0;
-    hw->rs485_conf.dl0_en = 1;
-    hw->rs485_conf.dl1_en = 1;
     hw->rs485_conf.en = 1;
 }
 
@@ -726,12 +724,9 @@ FORCE_INLINE_ATTR void uart_ll_set_mode_rs485_half_duplex(uart_dev_t *hw)
     hw->conf0.sw_rts = 1;
     // Half duplex mode
     hw->rs485_conf.tx_rx_en = 0;
-    // Setting this bit will allow data to be transmitted while receiving data(full-duplex mode).
-    // But note that this full-duplex mode has no conflict detection function
-    hw->rs485_conf.rx_busy_tx_en = 0;
+    // This is to void collision
+    hw->rs485_conf.rx_busy_tx_en = 1;
     hw->conf0.irda_en = 0;
-    hw->rs485_conf.dl0_en = 1;
-    hw->rs485_conf.dl1_en = 1;
     hw->rs485_conf.en = 1;
 }
 
@@ -749,8 +744,6 @@ FORCE_INLINE_ATTR void uart_ll_set_mode_collision_detect(uart_dev_t *hw)
     hw->rs485_conf.tx_rx_en = 1;
     // Transmitter should send data when the receiver is busy,
     hw->rs485_conf.rx_busy_tx_en = 1;
-    hw->rs485_conf.dl0_en = 1;
-    hw->rs485_conf.dl1_en = 1;
     hw->conf0.sw_rts = 0;
     hw->rs485_conf.en = 1;
 }
diff --git a/components/hal/esp32c3/include/hal/uart_ll.h b/components/hal/esp32c3/include/hal/uart_ll.h
index f9f00ad85a..8261a6662d 100644
--- a/components/hal/esp32c3/include/hal/uart_ll.h
+++ b/components/hal/esp32c3/include/hal/uart_ll.h
@@ -711,8 +711,6 @@ FORCE_INLINE_ATTR void uart_ll_set_mode_rs485_app_ctrl(uart_dev_t *hw)
     hw->conf0.irda_en = 0;
     hw->conf0.sw_rts = 0;
     hw->conf0.irda_en = 0;
-    hw->rs485_conf.dl0_en = 1;
-    hw->rs485_conf.dl1_en = 1;
     hw->rs485_conf.en = 1;
 }
 
@@ -727,14 +725,11 @@ FORCE_INLINE_ATTR void uart_ll_set_mode_rs485_half_duplex(uart_dev_t *hw)
 {
     // Enable receiver, sw_rts = 1  generates low level on RTS pin
     hw->conf0.sw_rts = 1;
-    // Half duplex mode
+    // Must be set to 0 to automatically remove echo
     hw->rs485_conf.tx_rx_en = 0;
-    // Setting this bit will allow data to be transmitted while receiving data(full-duplex mode).
-    // But note that this full-duplex mode has no conflict detection function
-    hw->rs485_conf.rx_busy_tx_en = 0;
+    // This is to void collision
+    hw->rs485_conf.rx_busy_tx_en = 1;
     hw->conf0.irda_en = 0;
-    hw->rs485_conf.dl0_en = 1;
-    hw->rs485_conf.dl1_en = 1;
     hw->rs485_conf.en = 1;
 }
 
@@ -752,8 +747,6 @@ FORCE_INLINE_ATTR void uart_ll_set_mode_collision_detect(uart_dev_t *hw)
     hw->rs485_conf.tx_rx_en = 1;
     // Transmitter should send data when the receiver is busy,
     hw->rs485_conf.rx_busy_tx_en = 1;
-    hw->rs485_conf.dl0_en = 1;
-    hw->rs485_conf.dl1_en = 1;
     hw->conf0.sw_rts = 0;
     hw->rs485_conf.en = 1;
 }
diff --git a/components/hal/esp32c6/include/hal/uart_ll.h b/components/hal/esp32c6/include/hal/uart_ll.h
index cbbf308bdc..c6793ff8c4 100644
--- a/components/hal/esp32c6/include/hal/uart_ll.h
+++ b/components/hal/esp32c6/include/hal/uart_ll.h
@@ -913,8 +913,6 @@ FORCE_INLINE_ATTR void uart_ll_set_mode_rs485_app_ctrl(uart_dev_t *hw)
     hw->conf0_sync.irda_en = 0;
     hw->conf0_sync.sw_rts = 0;
     hw->conf0_sync.irda_en = 0;
-    hw->rs485_conf_sync.dl0_en = 1;
-    hw->rs485_conf_sync.dl1_en = 1;
     hw->rs485_conf_sync.rs485_en = 1;
     uart_ll_update(hw);
 }
@@ -936,12 +934,9 @@ FORCE_INLINE_ATTR void uart_ll_set_mode_rs485_half_duplex(uart_dev_t *hw)
     hw->conf0_sync.sw_rts = 1;
     // Half duplex mode
     hw->rs485_conf_sync.rs485tx_rx_en = 0;
-    // Setting this bit will allow data to be transmitted while receiving data(full-duplex mode).
-    // But note that this full-duplex mode has no conflict detection function
-    hw->rs485_conf_sync.rs485rxby_tx_en = 0;
+    // This is to void collision
+    hw->rs485_conf_sync.rs485rxby_tx_en = 1;
     hw->conf0_sync.irda_en = 0;
-    hw->rs485_conf_sync.dl0_en = 1;
-    hw->rs485_conf_sync.dl1_en = 1;
     hw->rs485_conf_sync.rs485_en = 1;
     uart_ll_update(hw);
 }
@@ -964,8 +959,6 @@ FORCE_INLINE_ATTR void uart_ll_set_mode_collision_detect(uart_dev_t *hw)
     hw->rs485_conf_sync.rs485tx_rx_en = 1;
     // Transmitter should send data when the receiver is busy,
     hw->rs485_conf_sync.rs485rxby_tx_en = 1;
-    hw->rs485_conf_sync.dl0_en = 1;
-    hw->rs485_conf_sync.dl1_en = 1;
     hw->conf0_sync.sw_rts = 0;
     hw->rs485_conf_sync.rs485_en = 1;
     uart_ll_update(hw);
diff --git a/components/hal/esp32h2/include/hal/uart_ll.h b/components/hal/esp32h2/include/hal/uart_ll.h
index 14cbbfb14f..ed21113f62 100644
--- a/components/hal/esp32h2/include/hal/uart_ll.h
+++ b/components/hal/esp32h2/include/hal/uart_ll.h
@@ -755,8 +755,6 @@ FORCE_INLINE_ATTR void uart_ll_set_mode_rs485_app_ctrl(uart_dev_t *hw)
     hw->conf0_sync.irda_en = 0;
     hw->conf0_sync.sw_rts = 0;
     hw->conf0_sync.irda_en = 0;
-    hw->rs485_conf_sync.dl0_en = 1;
-    hw->rs485_conf_sync.dl1_en = 1;
     hw->rs485_conf_sync.rs485_en = 1;
     uart_ll_update(hw);
 }
@@ -774,12 +772,9 @@ FORCE_INLINE_ATTR void uart_ll_set_mode_rs485_half_duplex(uart_dev_t *hw)
     hw->conf0_sync.sw_rts = 1;
     // Half duplex mode
     hw->rs485_conf_sync.rs485tx_rx_en = 0;
-    // Setting this bit will allow data to be transmitted while receiving data(full-duplex mode).
-    // But note that this full-duplex mode has no conflict detection function
-    hw->rs485_conf_sync.rs485rxby_tx_en = 0;
+    // This is to void collision
+    hw->rs485_conf_sync.rs485rxby_tx_en = 1;
     hw->conf0_sync.irda_en = 0;
-    hw->rs485_conf_sync.dl0_en = 1;
-    hw->rs485_conf_sync.dl1_en = 1;
     hw->rs485_conf_sync.rs485_en = 1;
     uart_ll_update(hw);
 }
@@ -798,8 +793,6 @@ FORCE_INLINE_ATTR void uart_ll_set_mode_collision_detect(uart_dev_t *hw)
     hw->rs485_conf_sync.rs485tx_rx_en = 1;
     // Transmitter should send data when the receiver is busy,
     hw->rs485_conf_sync.rs485rxby_tx_en = 1;
-    hw->rs485_conf_sync.dl0_en = 1;
-    hw->rs485_conf_sync.dl1_en = 1;
     hw->conf0_sync.sw_rts = 0;
     hw->rs485_conf_sync.rs485_en = 1;
     uart_ll_update(hw);
diff --git a/components/hal/esp32p4/include/hal/uart_ll.h b/components/hal/esp32p4/include/hal/uart_ll.h
index 70560c235d..b0f86ae79f 100644
--- a/components/hal/esp32p4/include/hal/uart_ll.h
+++ b/components/hal/esp32p4/include/hal/uart_ll.h
@@ -1029,8 +1029,6 @@ FORCE_INLINE_ATTR void uart_ll_set_mode_rs485_app_ctrl(uart_dev_t *hw)
     hw->conf0_sync.irda_en = 0;
     hw->conf0_sync.sw_rts = 0;
     hw->conf0_sync.irda_en = 0;
-    hw->rs485_conf_sync.dl0_en = 1;
-    hw->rs485_conf_sync.dl1_en = 1;
     hw->rs485_conf_sync.rs485_en = 1;
     uart_ll_update(hw);
 }
@@ -1052,12 +1050,9 @@ FORCE_INLINE_ATTR void uart_ll_set_mode_rs485_half_duplex(uart_dev_t *hw)
     hw->conf0_sync.sw_rts = 1;
     // Half duplex mode
     hw->rs485_conf_sync.rs485tx_rx_en = 0;
-    // Setting this bit will allow data to be transmitted while receiving data(full-duplex mode).
-    // But note that this full-duplex mode has no conflict detection function
-    hw->rs485_conf_sync.rs485rxby_tx_en = 0;
+	// This is to void collision
+    hw->rs485_conf_sync.rs485rxby_tx_en = 1;
     hw->conf0_sync.irda_en = 0;
-    hw->rs485_conf_sync.dl0_en = 1;
-    hw->rs485_conf_sync.dl1_en = 1;
     hw->rs485_conf_sync.rs485_en = 1;
     uart_ll_update(hw);
 }
@@ -1080,8 +1075,6 @@ FORCE_INLINE_ATTR void uart_ll_set_mode_collision_detect(uart_dev_t *hw)
     hw->rs485_conf_sync.rs485tx_rx_en = 1;
     // Transmitter should send data when the receiver is busy,
     hw->rs485_conf_sync.rs485rxby_tx_en = 1;
-    hw->rs485_conf_sync.dl0_en = 1;
-    hw->rs485_conf_sync.dl1_en = 1;
     hw->conf0_sync.sw_rts = 0;
     hw->rs485_conf_sync.rs485_en = 1;
     uart_ll_update(hw);