mongoose

ESP-Mongoose_UI/main/CMakeLists.txt

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+FILE(GLOB cfiles *.c)
+FILE(GLOB mongoose_files ../mongoose/*.c)
+idf_component_register(SRCS ${cfiles} ${mongoose_files}
+                       INCLUDE_DIRS "." "../mongoose")

ESP-Mongoose_UI/main/main.c

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+// SPDX-FileCopyrightText: 2024 Cesanta Software Limited
+// SPDX-License-Identifier: GPL-2.0-only or commercial
+// Generated by Mongoose Wizard, https://mongoose.ws/wizard/
+
+#include "mongoose_glue.h"
+
+#define WIFI_SSID "My_WiFi_Network"
+#define WIFI_PASS "My_WiFi_Password"
+
+extern void wifi_init(const char *ssid, const char *pass);
+
+void app_main() {
+  wifi_init(WIFI_SSID, WIFI_PASS); // This blocks until connected
+  run_mongoose();
+}

ESP-Mongoose_UI/main/wifi.c

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+#include "esp_wifi.h"
+#include "mongoose.h"
+#include "nvs_flash.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/event_groups.h"
+
+static EventGroupHandle_t s_wifi_event_group;
+#define WIFI_CONNECTED_BIT BIT0
+#define WIFI_FAIL_BIT BIT1
+
+static void event_handler(void *arg, esp_event_base_t event_base,
+                          int32_t event_id, void *event_data) {
+  static int retry_count = 0;
+  if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
+    esp_wifi_connect();
+  } else if (event_base == WIFI_EVENT &&
+             event_id == WIFI_EVENT_STA_DISCONNECTED) {
+    esp_wifi_connect();
+    retry_count++;
+    MG_INFO(("Connecting to the AP fail, attempt #%d", retry_count));
+  } else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
+    ip_event_got_ip_t *event = (ip_event_got_ip_t *) event_data;
+    MG_INFO(("Got IP ADDRESS: " IPSTR, IP2STR(&event->ip_info.ip)));
+    retry_count = 0;
+    xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
+  }
+}
+
+void wifi_init(const char *ssid, const char *pass) {
+  // Initialize NVS
+  esp_err_t ret = nvs_flash_init();
+  if (ret == ESP_ERR_NVS_NO_FREE_PAGES ||
+      ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
+    ESP_ERROR_CHECK(nvs_flash_erase());
+    ret = nvs_flash_init();
+  }
+  ESP_ERROR_CHECK(ret);
+
+  s_wifi_event_group = xEventGroupCreate();
+  ESP_ERROR_CHECK(esp_netif_init());
+  ESP_ERROR_CHECK(esp_event_loop_create_default());
+  esp_netif_create_default_wifi_sta();
+  wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
+  ESP_ERROR_CHECK(esp_wifi_init(&cfg));
+  esp_event_handler_instance_t instance_any_id;
+  esp_event_handler_instance_t instance_got_ip;
+  ESP_ERROR_CHECK(esp_event_handler_instance_register(
+      WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL, &instance_any_id));
+  ESP_ERROR_CHECK(esp_event_handler_instance_register(
+      IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL, &instance_got_ip));
+  wifi_config_t wc = {};
+  strncpy((char *) wc.sta.ssid, ssid, sizeof(wc.sta.ssid));
+  strncpy((char *) wc.sta.password, pass, sizeof(wc.sta.password));
+  ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
+  ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, &wc));
+  ESP_ERROR_CHECK(esp_wifi_start());
+
+  MG_INFO(("Trying to connect to SSID:%s pass:%s", ssid, pass));
+  EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
+                                         WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
+                                         pdFALSE, pdFALSE, portMAX_DELAY);
+
+  if (bits & WIFI_CONNECTED_BIT) {
+    MG_INFO(("connected to ap SSID:%s pass:%s", ssid, pass));
+  } else if (bits & WIFI_FAIL_BIT) {
+    MG_ERROR(("Failed to connect to SSID:%s, pass:%s", ssid, pass));
+  } else {
+    MG_ERROR(("UNEXPECTED EVENT"));
+  }
+}