diff --git a/components/hal/esp32c2/include/hal/uart_ll.h b/components/hal/esp32c2/include/hal/uart_ll.h
index 157d2e2cb3..a632d17d33 100644
--- a/components/hal/esp32c2/include/hal/uart_ll.h
+++ b/components/hal/esp32c2/include/hal/uart_ll.h
@@ -721,8 +721,6 @@ 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;
 }
 
@@ -739,12 +737,9 @@ 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;
 }
 
@@ -762,8 +757,6 @@ 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 fd7aa05de0..904892ff56 100644
--- a/components/hal/esp32c3/include/hal/uart_ll.h
+++ b/components/hal/esp32c3/include/hal/uart_ll.h
@@ -724,8 +724,6 @@ 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;
 }
 
@@ -740,14 +738,11 @@ 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;
 }
 
@@ -765,8 +760,6 @@ 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 653fb37bbc..faee1fb786 100644
--- a/components/hal/esp32c6/include/hal/uart_ll.h
+++ b/components/hal/esp32c6/include/hal/uart_ll.h
@@ -948,8 +948,6 @@ 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);
 }
@@ -971,12 +969,9 @@ 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);
 }
@@ -999,8 +994,6 @@ 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 4fa29d216f..14e06cee41 100644
--- a/components/hal/esp32h2/include/hal/uart_ll.h
+++ b/components/hal/esp32h2/include/hal/uart_ll.h
@@ -766,8 +766,6 @@ 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);
 }
@@ -785,12 +783,9 @@ 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);
 }
@@ -809,8 +804,6 @@ 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 9b62cea267..41eb44f62d 100644
--- a/components/hal/esp32p4/include/hal/uart_ll.h
+++ b/components/hal/esp32p4/include/hal/uart_ll.h
@@ -1081,8 +1081,6 @@ 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);
 }
@@ -1104,12 +1102,9 @@ 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);
 }
@@ -1132,8 +1127,6 @@ 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);