first commit

main/wifi_service/http_client.c

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+/*
+ * web_client.c
+ *
+ *  Created on: 4. aug. 2023
+ *      Author: OZ1CM
+ */
+#include "http_client.h"
+
+
+#include "esp_log.h"
+
+#define TAG "http_client"
+
+esp_err_t _http_event_handle(esp_http_client_event_t *evt)
+{
+    switch(evt->event_id) {
+        case HTTP_EVENT_ERROR:
+            ESP_LOGI(TAG, "HTTP_EVENT_ERROR");
+            break;
+        case HTTP_EVENT_ON_CONNECTED:
+            ESP_LOGI(TAG, "HTTP_EVENT_ON_CONNECTED");
+            break;
+        case HTTP_EVENT_HEADER_SENT:
+            ESP_LOGI(TAG, "HTTP_EVENT_HEADER_SENT");
+           // printf("%.*s", evt->data_len, (char*)evt->data);
+            break;
+        case HTTP_EVENT_ON_HEADER:
+            ESP_LOGI(TAG, "HTTP_EVENT_ON_HEADER");
+            printf("%.*s", evt->data_len, (char*)evt->data);
+            break;
+        case HTTP_EVENT_ON_DATA:
+            ESP_LOGI(TAG, "HTTP_EVENT_ON_DATA, len=%d", evt->data_len);
+            //if (!esp_http_client_is_chunked_response(evt->client)) {
+            ESP_LOGI(TAG,"Response from server: %s",(char*)evt->data);
+
+            //}
+
+            break;
+        case HTTP_EVENT_ON_FINISH:
+            ESP_LOGI(TAG, "HTTP_EVENT_ON_FINISH");
+            break;
+        case HTTP_EVENT_DISCONNECTED:
+            ESP_LOGI(TAG, "HTTP_EVENT_DISCONNECTED");
+            break;
+        default:
+        break;
+    }
+    return ESP_OK;
+}
+
+int http_client_sendUrl(http_client_t *inst,char *url){
+
+	esp_http_client_config_t config = {
+		.url = url,
+		.method =  HTTP_METHOD_GET,
+		//.event_handler =  _http_event_handle,
+	};
+
+
+
+
+	inst->client = esp_http_client_init(&config);
+
+	esp_err_t err;
+
+	err = esp_http_client_perform(inst->client);
+
+	// some error logging..
+	if(err == ESP_OK){
+
+		int status_code = esp_http_client_get_status_code(inst->client);
+
+		switch (status_code){
+
+		case 200:
+			ESP_LOGI(TAG, "Message sent Successfully");
+			esp_http_client_cleanup(inst->client);
+			return 0;
+			break;
+
+		default:
+			ESP_LOGE(TAG, "Message sent Failed");
+			esp_http_client_cleanup(inst->client);
+			return 1;
+			break;
+
+		}
+
+
+	}else{
+		ESP_LOGE(TAG, "Message sent Failed");
+		esp_http_client_cleanup(inst->client);
+	}
+
+	
+
+//	ESP_LOGI(TAG, "URL: %s", inst->client->);
+	//ESP_LOGI(TAG,"hejmeddig");
+
+	//esp_http_client_set_header(inst->client, "Content-Type", "application/x-www-form-urlencoded");
+	return 1;
+
+}

main/wifi_service/http_client.h

@@ -0,0 +1,24 @@
+/*
+ * web_client.h
+ *
+ *  Created on: 4. aug. 2023
+ *      Author: OZ1CM
+ */
+
+#ifndef MAIN_INCLUDE_HTTP_CLIENT_H_
+#define MAIN_INCLUDE_HTTP_CLIENT_H_
+#include "esp_http_client.h"
+
+typedef struct {
+
+	// Config
+	esp_http_client_config_t config;
+	esp_http_client_handle_t client;
+
+}http_client_t;
+
+int http_client_sendUrl(http_client_t *inst,char *url);
+
+
+
+#endif /* MAIN_INCLUDE_HTTP_CLIENT_H_ */

main/wifi_service/wifi_service.c

@@ -0,0 +1,185 @@
+/*
+ * wifi_service.c
+ *
+ *  Created on: 26 May 2026
+ *      Author: Christian Lind Vie Madsen
+ */
+#include "wifi_service.h"
+#include <string.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/event_groups.h"
+#include "esp_system.h"
+#include "esp_wifi.h"
+#include "esp_event.h"
+#include "esp_log.h"
+#include "nvs_flash.h"
+#include "../board_defines/wifi_info.h"
+
+#include "lwip/err.h"
+#include "lwip/sys.h"
+
+#define ESP_HOSTNAME "ws_wifi_client"
+#define EXAMPLE_ESP_MAXIMUM_RETRY  5
+
+/* FreeRTOS event group to signal when we are connected*/
+static EventGroupHandle_t s_wifi_event_group;
+static int s_retry_num = 0;
+
+/* The event group allows multiple bits for each event, but we only care about two events:
+ * - we are connected to the AP with an IP
+ * - we failed to connect after the maximum amount of retries */
+#define WIFI_CONNECTED_BIT BIT0
+#define WIFI_FAIL_BIT      BIT1
+
+#define TAG "wifi_driver"
+
+static void event_handler(void *arg, esp_event_base_t event_base,
+		int32_t event_id, void *event_data) {
+	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 < EXAMPLE_ESP_MAXIMUM_RETRY) {
+			esp_wifi_connect();
+			//s_retry_num++;
+			ESP_LOGI(TAG, "retry to connect to the AP");
+		} else {
+			xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
+		}
+		ESP_LOGI(TAG, "connect to the AP fail");
+	} 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, "got ip:" IPSTR, IP2STR(&event->ip_info.ip));
+		s_retry_num = 0;
+		xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
+	}
+}
+
+/**
+ * @brief Get RSSI of currently connected WiFi AP
+ * @return RSSI in dBm (e.g. -45), or 0 if not connected / error
+ */
+int wifi_get_rssi(void)
+{
+    wifi_ap_record_t ap_info;
+
+    esp_err_t err = esp_wifi_sta_get_ap_info(&ap_info);
+    if (err != ESP_OK) {
+        return -113;  // not connected or error
+    }
+
+    return ap_info.rssi;
+}
+
+int wifi_IsConnected(){
+
+	EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
+	WIFI_CONNECTED_BIT | WIFI_FAIL_BIT, pdFALSE, pdFALSE, portMAX_DELAY);
+
+	if (bits & WIFI_CONNECTED_BIT) return 1;
+
+	return 0;
+}
+
+void wifi_checkConnection(){
+
+	static uint32_t runtimer = 0;
+
+
+	if((runtimer++ % 50) == 0){
+	EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
+	WIFI_CONNECTED_BIT | WIFI_FAIL_BIT, pdFALSE, pdFALSE, portMAX_DELAY);
+
+	/* xEventGroupWaitBits() returns the bits before the call returned, hence we can test which event actually
+	 * happened. */
+	if (bits & WIFI_CONNECTED_BIT) {
+		ESP_LOGI(TAG, "connected to ap ");
+	} else if (bits & WIFI_FAIL_BIT) {
+		ESP_LOGI(TAG, "Failed to connect to SSID");
+
+		ESP_ERROR_CHECK(esp_wifi_stop());
+		vTaskDelay(1000);
+		ESP_ERROR_CHECK(esp_wifi_start());
+
+	} else {
+		ESP_LOGE(TAG, "UNEXPECTED EVENT");
+	}
+
+	}
+
+}
+
+int wifi_scan_to_buffer(char ssid[][33], int *rssi, int max_len)
+{
+    uint16_t ap_count = 0;
+    wifi_ap_record_t ap_info[25];
+
+    memset(ap_info, 0, sizeof(ap_info));
+
+    ESP_ERROR_CHECK(esp_wifi_scan_start(NULL, true));
+    ESP_ERROR_CHECK(esp_wifi_scan_get_ap_num(&ap_count));
+
+    if (ap_count > max_len) {
+        ap_count = max_len;
+    }
+
+    ESP_ERROR_CHECK(esp_wifi_scan_get_ap_records(&ap_count, ap_info));
+
+    for (int i = 0; i < ap_count; i++) {
+        strncpy(ssid[i], (char *)ap_info[i].ssid, 13);
+        ssid[i][13] = '\0';  // safety null-terminate
+
+        rssi[i] = ap_info[i].rssi;
+    }
+
+    return ap_count;
+}
+
+void wifi_init_start(void) {
+	
+		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();
+}
+
+
+	s_wifi_event_group = xEventGroupCreate();
+
+	ESP_ERROR_CHECK(esp_netif_init());
+
+	ESP_ERROR_CHECK(esp_event_loop_create_default());
+	esp_netif_t *netif = esp_netif_create_default_wifi_sta();
+
+	esp_netif_set_hostname(netif, ESP_HOSTNAME);
+
+	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 wifi_config = { .sta = { .ssid = SSID,
+			.password = PASSWORD,
+			/* Setting a password implies station will connect to all security modes including WEP/WPA.
+			 * However these modes are deprecated and not advisable to be used. Incase your Access point
+			 * doesn't support WPA2, these mode can be enabled by commenting below line */
+			.threshold.authmode = WIFI_AUTH_WPA2_PSK, }, };
+	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, "wifi_init_sta finished.");
+
+}
+
+
+
+

main/wifi_service/wifi_service.h

@@ -0,0 +1,20 @@
+/*
+ * wifi_service.h
+ *
+ *  Created on: 26 May 2026
+ *      Author: Christian Lind Vie Madsen
+ */
+
+#ifndef MAIN_WIFI_SERVICE_WIFI_SERVICE_H_
+#define MAIN_WIFI_SERVICE_WIFI_SERVICE_H_
+
+
+
+
+int wifi_scan_to_buffer(char ssid[][33], int *rssi, int max_len);
+void wifi_init_start(void);
+int wifi_IsConnected();
+int wifi_get_rssi(void);
+
+
+#endif /* MAIN_WIFI_SERVICE_WIFI_SERVICE_H_ */