From 9ffd551f594f52e6690b91ddad1084d6f45bac28 Mon Sep 17 00:00:00 2001
From: Mateusz <mateusz.piecuch@yahoo.com>
Date: Fri, 18 Sep 2026 14:19:33 +0200
Subject: [PATCH] common repo init commit, wifi, http server

---
 ygg_http_server.c | 19 ++++++++++
 ygg_http_server.h |  6 ++++
 ygg_wifi.c        | 90 +++++++++++++++++++++++++++++++++++++++++++++++
 ygg_wifi.h        | 11 ++++++
 4 files changed, 126 insertions(+)
 create mode 100644 ygg_http_server.c
 create mode 100644 ygg_http_server.h
 create mode 100644 ygg_wifi.c
 create mode 100644 ygg_wifi.h

diff --git a/ygg_http_server.c b/ygg_http_server.c
new file mode 100644
index 0000000..16e635b
--- /dev/null
+++ b/ygg_http_server.c
@@ -0,0 +1,19 @@
+#include "esp_http_server.h"
+#include "ygg_http_server.h"
+#include "esp_log.h"
+
+static const char *TAG = "YGG_HTTP_SERVER";
+
+httpd_handle_t ygg_start_webserver(void)
+{
+    httpd_handle_t server = NULL;
+    httpd_config_t config = HTTPD_DEFAULT_CONFIG();
+
+    ESP_LOGI(TAG, "Starting http server on port: %d", config.server_port);
+    if (httpd_start(&server, &config) == ESP_OK) {
+        return server;
+    }
+
+    ESP_LOGE(TAG, "Error starting server!");
+    return NULL;
+}
diff --git a/ygg_http_server.h b/ygg_http_server.h
new file mode 100644
index 0000000..2abcce8
--- /dev/null
+++ b/ygg_http_server.h
@@ -0,0 +1,6 @@
+#ifndef YGG_HTTP_SERV
+#define YGG_HTTP_SERV
+
+httpd_handle_t ygg_start_webserver(void);
+
+#endif
diff --git a/ygg_wifi.c b/ygg_wifi.c
new file mode 100644
index 0000000..363a01f
--- /dev/null
+++ b/ygg_wifi.c
@@ -0,0 +1,90 @@
+#include <freertos/FreeRTOS.h>
+#include "freertos/event_groups.h"
+#include "esp_wifi.h"
+#include "esp_event.h"
+#include "esp_netif.h"
+#include "esp_log.h"
+#include "ygg_wifi.h"
+
+#define WIFI_SSID  "TP-Link_8D0E"
+#define WIFI_PASS  "49824643"
+
+#define WIFI_CONNECTED_BIT BIT0
+#define WIFI_FAIL_BIT      BIT1
+
+static const char *TAG = "YGG_WIFI";
+static EventGroupHandle_t s_wifi_event_group;
+
+void ygg_wifi_event_handler(void* arg, esp_event_base_t event_base,
+                            int32_t event_id, void* event_data)
+{
+    static int s_retry_num = 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) {
+        if (s_retry_num < 5) {
+            esp_wifi_connect();
+            s_retry_num++;
+            ESP_LOGI(TAG, "Resuming connection to AP...");
+        } else {
+            xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
+        }
+        ESP_LOGI(TAG, "Connection to AP failed");
+    } 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;
+        ESP_LOGI(TAG, "IP acquired:" IPSTR, IP2STR(&event->ip_info.ip));
+        s_retry_num = 0;
+        xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
+    }
+}
+
+void ygg_wifi_init_sta(void)
+{
+    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,
+                                                        &ygg_wifi_event_handler,
+                                                        NULL,
+                                                        &instance_any_id));
+    ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT,
+                                                        IP_EVENT_STA_GOT_IP,
+                                                        &ygg_wifi_event_handler,
+                                                        NULL,
+                                                        &instance_got_ip));
+
+    wifi_config_t wifi_config = {
+        .sta = {
+            .ssid = WIFI_SSID,
+            .password = WIFI_PASS,
+        },
+    };
+    ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
+    ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, &wifi_config));
+    ESP_ERROR_CHECK(esp_wifi_start());
+
+    ESP_LOGI(TAG, "Initialization wifi_init_sta done.");
+
+    EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
+            WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
+            pdFALSE,
+            pdFALSE,
+            portMAX_DELAY);
+
+    if (bits & WIFI_CONNECTED_BIT) {
+        ESP_LOGI(TAG, "Connected to AP SSID:%s", WIFI_SSID);
+    } else if (bits & WIFI_FAIL_BIT) {
+        ESP_LOGI(TAG, "Connection error SSID:%s", WIFI_SSID);
+    } else {
+        ESP_LOGE(TAG, "UNEXPECTED EVENT");
+    }
+}
diff --git a/ygg_wifi.h b/ygg_wifi.h
new file mode 100644
index 0000000..cc73bbd
--- /dev/null
+++ b/ygg_wifi.h
@@ -0,0 +1,11 @@
+#ifndef YGG_WIFI
+#define YGG_WIFI
+
+#include "freertos/event_groups.h"
+#include "esp_event.h"
+
+void ygg_wifi_event_handler(void* arg, esp_event_base_t event_base,
+                        int32_t event_id, void* event_data);
+void ygg_wifi_init_sta(void);
+
+#endif