Add esp_http_client

Add error handling for http client

set ssid password correct with Example_WIFI test, and clear password before free

Fixed the CI failure due to HTTP errror names

examples/protocols/esp_http_client/main/app_wifi.c

@@ -0,0 +1,75 @@
+/* ESP HTTP Client Example
+
+   This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+*/
+
+#include "esp_wifi.h"
+#include "esp_event_loop.h"
+#include "esp_log.h"
+#include "esp_system.h"
+#include "freertos/event_groups.h"
+#include "esp_wifi.h"
+#include "esp_event_loop.h"
+#include "esp_log.h"
+#include "app_wifi.h"
+
+static const char *TAG = "WIFI";
+
+/* FreeRTOS event group to signal when we are connected & ready to make a request */
+static EventGroupHandle_t wifi_event_group;
+
+/* The event group allows multiple bits for each event,
+   but we only care about one event - are we connected
+   to the AP with an IP? */
+const int CONNECTED_BIT = BIT0;
+
+static esp_err_t event_handler(void *ctx, system_event_t *event)
+{
+    switch (event->event_id) {
+        case SYSTEM_EVENT_STA_START:
+            esp_wifi_connect();
+            break;
+        case SYSTEM_EVENT_STA_GOT_IP:
+            xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
+            break;
+        case SYSTEM_EVENT_STA_DISCONNECTED:
+            /* This is a workaround as ESP32 WiFi libs don't currently
+               auto-reassociate. */
+            esp_wifi_connect();
+            xEventGroupClearBits(wifi_event_group, CONNECTED_BIT);
+            break;
+        default:
+            break;
+    }
+    return ESP_OK;
+}
+
+void app_wifi_initialise(void)
+{
+    tcpip_adapter_init();
+    wifi_event_group = xEventGroupCreate();
+    ESP_ERROR_CHECK(esp_event_loop_init(event_handler, NULL));
+    wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
+    ESP_ERROR_CHECK(esp_wifi_init(&cfg));
+    ESP_ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_RAM));
+    wifi_config_t wifi_config = {
+        .sta = {
+            .ssid = CONFIG_WIFI_SSID,
+            .password = CONFIG_WIFI_PASSWORD,
+        },
+    };
+    ESP_LOGI(TAG, "Setting WiFi configuration SSID %s...", wifi_config.sta.ssid);
+    ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
+    ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config));
+    ESP_ERROR_CHECK(esp_wifi_start());
+
+}
+
+void app_wifi_wait_connected()
+{
+    xEventGroupWaitBits(wifi_event_group, CONNECTED_BIT, false, true, portMAX_DELAY);
+}