mesh: update mesh libs

1. fix issues on sending beacon caused by too much tx retries on other packets.
2. modify not to scan if rc exists when connect.
3. modify scan dwell time to default 120ms fo root.

components/esp32/lib

@@ -1 +1 @@
-Subproject commit 5fc06965e5eaa420dc69cbafd35235f508d6acea
+Subproject commit 04299f48a7a76609e86c72eb28c9bf53fce9e4fc

examples/mesh/internal_transceiver/main/mesh_main.c

@@ -32,7 +32,7 @@
  *                Variable Definitions
  *******************************************************/
 static const char *MESH_TAG = "mesh_main";
-static const uint8_t MESH_ID[6] = { 0x77, 0x77, 0x77, 0x77, 0x77, 0x77 };
+static const uint8_t MESH_ID[6] = { 0x77, 0x77, 0x77, 0x77, 0x77, 0x77};
 static uint8_t tx_buf[TX_SIZE] = { 0, };
 static uint8_t rx_buf[RX_SIZE] = { 0, };
 static bool is_running = true;
@@ -101,10 +101,10 @@ void esp_mesh_p2p_tx_main(void *arg)
     while (is_running) {
         /* normal nodes rather than root do nothing but print */
         if (!esp_mesh_is_root()) {
-            ESP_LOGI(MESH_TAG, "[layer:%d]%s%s[rtableSize:%d]", mesh_layer,
+            ESP_LOGI(MESH_TAG, "layer:%d, rtableSize:%d, %s%s", mesh_layer,
+                     esp_mesh_get_routing_table_size(),
                      is_mesh_connected ? "CONNECT" : "DISCONNECT",
-                     esp_mesh_is_root() ? "<ROOT>" : "[NODE]",
-                     esp_mesh_get_routing_table_size())
+                     esp_mesh_is_root() ? "<ROOT>" : "[NODE]")
             vTaskDelay(10 * 1000 / portTICK_RATE_MS);
             continue;
         }
@@ -149,7 +149,9 @@ void esp_mesh_p2p_tx_main(void *arg)
                          err, data.proto, data.tos)
             }
         }
-        vTaskDelay(1 * 1000 / portTICK_RATE_MS);
+        if (route_table_size < 10) {
+            vTaskDelay(1 * 1000 / portTICK_RATE_MS);
+        }
     }
     vTaskDelete(NULL);
 }
@@ -394,6 +396,11 @@ void app_main(void)
     memcpy((uint8_t *) &cfg.mesh_ap.password, CONFIG_MESH_AP_PASSWD,
            strlen(CONFIG_MESH_AP_PASSWD));
     ESP_ERROR_CHECK(esp_mesh_set_config(&cfg));
+    /* set RSSI threshold for connecting to the root */
+    mesh_switch_parent_t switch_paras ;
+    ESP_ERROR_CHECK(esp_mesh_get_switch_parent_paras(&switch_paras));
+    switch_paras.backoff_rssi = -45;
+    ESP_ERROR_CHECK(esp_mesh_set_switch_parent_paras(&switch_paras));
     /* mesh start */
     ESP_ERROR_CHECK(esp_mesh_start());
     ESP_LOGI(MESH_TAG, "mesh starts successfully, heap:%d\n",  esp_get_free_heap_size())