fix(uart_test): do not detach both UART pins

Updated UART test configuration to detach TX pin while keeping RX pin active. Adjusted assertions to reflect the new pin settings.

Author: SuGlider

tests/validation/uart/uart.ino

@@ -377,19 +377,23 @@ void change_pins_test(void) {
     UARTTestConfig &config = *uart_test_configs[0];
     // pinMode will force enabling the internal pullup resistor (IDF 5.3.2 Change)
     pinMode(NEW_RX1, INPUT_PULLUP);
-    config.serial.setPins(NEW_RX1, NEW_TX1);
+    // Detaching both pins will result in stoping the UART driver
+    // Only detach one of the pins
+    config.serial.setPins(NEW_RX1, /*NEW_TX1*/ -1);
     TEST_ASSERT_EQUAL(NEW_RX1, uart_get_RxPin(config.uart_num));
-    TEST_ASSERT_EQUAL(NEW_TX1, uart_get_TxPin(config.uart_num));
+    //TEST_ASSERT_EQUAL(NEW_TX1, uart_get_TxPin(config.uart_num));
 
     uart_internal_loopback(config.uart_num, NEW_RX1);
     config.transmit_and_check_msg("using new pins");
   } else {
     for (int i = 0; i < TEST_UART_NUM; i++) {
       UARTTestConfig &config = *uart_test_configs[i];
       UARTTestConfig &next_uart = *uart_test_configs[(i + 1) % TEST_UART_NUM];
-      config.serial.setPins(next_uart.default_rx_pin, next_uart.default_tx_pin);
+      // Detaching both pins will result in stoping the UART driver
+      // Only detach one of the pins
+      config.serial.setPins(next_uart.default_rx_pin, /*next_uart.default_tx_pin*/ -1);
       TEST_ASSERT_EQUAL(uart_get_RxPin(config.uart_num), next_uart.default_rx_pin);
-      TEST_ASSERT_EQUAL(uart_get_TxPin(config.uart_num), next_uart.default_tx_pin);
+      //TEST_ASSERT_EQUAL(uart_get_TxPin(config.uart_num), next_uart.default_tx_pin);
 
       uart_internal_loopback(config.uart_num, next_uart.default_rx_pin);
       config.transmit_and_check_msg("using new pins");
@@ -398,7 +402,6 @@ void change_pins_test(void) {
 
   Serial.println("Change pins test successful");
 }
-
 // This test checks if the auto baudrate detection works on ESP32 and ESP32-S2
 #if CONFIG_IDF_TARGET_ESP32 || CONFIG_IDF_TARGET_ESP32S2
 void auto_baudrate_test(void) {
@@ -450,7 +453,7 @@ void periman_test(void) {
 
   for (auto *ref : uart_test_configs) {
     UARTTestConfig &config = *ref;
-    // detaching both pins will result in stoping the UART driver
+    // Detaching both pins will result in stoping the UART driver
     // Only detach one of the pins
     Wire.begin(config.default_rx_pin, /*config.default_tx_pin*/ -1);
     config.recv_msg = "";