feat(gateway): enhance UART configuration validation for Modbus and KNX

Signed-off-by: Tony <tonylu@tony-cloud.com>

components/gateway_knx/src/gateway_knx.cpp

@@ -655,10 +655,18 @@ esp_err_t GatewayKnxTpIpRouter::start(uint32_t task_stack_size, UBaseType_t task
   }
   stop_requested_ = false;
   last_error_.clear();
+  if (!configureSocket()) {
+    return ESP_FAIL;
+  }
+  if (!configureTpUart()) {
+    closeSockets();
+    return ESP_FAIL;
+  }
   const BaseType_t created = xTaskCreate(&GatewayKnxTpIpRouter::TaskEntry, "gw_knx_ip",
                                          task_stack_size, this, task_priority, &task_handle_);
   if (created != pdPASS) {
     task_handle_ = nullptr;
+    closeSockets();
     return ESP_ERR_NO_MEM;
   }
   started_ = true;
@@ -668,6 +676,11 @@ esp_err_t GatewayKnxTpIpRouter::start(uint32_t task_stack_size, UBaseType_t task
 esp_err_t GatewayKnxTpIpRouter::stop() {
   stop_requested_ = true;
   closeSockets();
+  const TaskHandle_t current_task = xTaskGetCurrentTaskHandle();
+  for (int attempt = 0; task_handle_ != nullptr && task_handle_ != current_task && attempt < 50;
+       ++attempt) {
+    vTaskDelay(pdMS_TO_TICKS(10));
+  }
   return ESP_OK;
 }
 
@@ -680,15 +693,6 @@ void GatewayKnxTpIpRouter::TaskEntry(void* arg) {
 }
 
 void GatewayKnxTpIpRouter::taskLoop() {
-  if (!configureSocket()) {
-    finishTask();
-    return;
-  }
-  if (!configureTpUart()) {
-    finishTask();
-    return;
-  }
-
   std::array<uint8_t, 768> buffer{};
   while (!stop_requested_) {
     sockaddr_in remote{};