diff --git a/cores/esp32/esp32-hal-uart.c b/cores/esp32/esp32-hal-uart.c
index 0737a0322e9..0b868e3b480 100644
--- a/cores/esp32/esp32-hal-uart.c
+++ b/cores/esp32/esp32-hal-uart.c
@@ -184,6 +184,8 @@ static bool _uartAttachPins(uint8_t uart_num, int8_t rxPin, int8_t txPin, int8_t
 
     bool retCode = true;
     if (rxPin >= 0) {
+        // forces a clean detaching from a previous peripheral
+        if (perimanGetPinBusType(rxPin) != ESP32_BUS_TYPE_INIT) perimanSetPinBus(rxPin, ESP32_BUS_TYPE_INIT, NULL);
         // connect RX Pad
         bool ret = ESP_OK == uart_set_pin(uart->num, UART_PIN_NO_CHANGE, rxPin, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
         if (ret) {
@@ -196,6 +198,8 @@ static bool _uartAttachPins(uint8_t uart_num, int8_t rxPin, int8_t txPin, int8_t
         retCode &= ret;
     }
     if (txPin >= 0) {
+        // forces a clean detaching from a previous peripheral
+        if (perimanGetPinBusType(txPin) != ESP32_BUS_TYPE_INIT) perimanSetPinBus(txPin, ESP32_BUS_TYPE_INIT, NULL);
         // connect TX Pad
         bool ret = ESP_OK == uart_set_pin(uart->num, txPin, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
         if (ret) {
@@ -208,6 +212,8 @@ static bool _uartAttachPins(uint8_t uart_num, int8_t rxPin, int8_t txPin, int8_t
         retCode &= ret;
     }
     if (ctsPin >= 0) {
+        // forces a clean detaching from a previous peripheral
+        if (perimanGetPinBusType(ctsPin) != ESP32_BUS_TYPE_INIT) perimanSetPinBus(ctsPin, ESP32_BUS_TYPE_INIT, NULL);
         // connect CTS Pad
         bool ret = ESP_OK == uart_set_pin(uart->num, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, ctsPin);
         if (ret) {
@@ -220,6 +226,8 @@ static bool _uartAttachPins(uint8_t uart_num, int8_t rxPin, int8_t txPin, int8_t
         retCode &= ret;
     }
     if (rtsPin >= 0) {
+        // forces a clean detaching from a previous peripheral
+        if (perimanGetPinBusType(rtsPin) != ESP32_BUS_TYPE_INIT) perimanSetPinBus(rtsPin, ESP32_BUS_TYPE_INIT, NULL);
         // connect RTS Pad
         bool ret = ESP_OK == uart_set_pin(uart->num, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, rtsPin, UART_PIN_NO_CHANGE);
         if (ret) {