From 5797d80c47bce3e5ce44f3ed748393dad130f375 Mon Sep 17 00:00:00 2001
From: Astin Biju <astinbiju44@gmail.com>
Date: Thu, 31 Aug 2023 21:46:33 +0530
Subject: [PATCH] wifi connection  added

---
 src/main.c | 101 +++++++++++++++++++++++++++++++++++------------------
 1 file changed, 67 insertions(+), 34 deletions(-)

diff --git a/src/main.c b/src/main.c
index 81e2f9a..4805cf5 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,50 +1,83 @@
-#include<driver/gpio.h>
-#include <rom/gpio.h>
-#include<freertos/FreeRTOS.h>
-#include <freertos/task.h>
+#include <stdio.h> //for basic printf commands
+#include <string.h> //for handling strings
+#include "freertos/FreeRTOS.h" //for delay,mutexs,semphrs rtos operations
+#include "esp_system.h" //esp_init funtions esp_err_t 
+#include "esp_wifi.h" //esp_wifi_init functions and wifi operations
+#include "esp_log.h" //for showing logs
+#include "esp_event.h" //for wifi event
+#include "nvs_flash.h" //non volatile storage
 
 
-#define LED_PIN 13
+#include "lwip/sockets.h"
+#include "lwip/dns.h"
+#include "lwip/netdb.h"
 
 
-void ledON() {
-  printf("LED ON");
-  gpio_set_level(LED_PIN,0);
-}
-
-void ledOFF() {
-  printf("LED OFF");
-  gpio_set_level(LED_PIN,1);
-}
-
-
-void led_blink(void *pvParameters)
-{
-    gpio_pad_select_gpio(LED_PIN);
-    gpio_set_direction(LED_PIN,GPIO_MODE_OUTPUT);
 
 
-    while(1){
-        ledON();
-        vTaskDelay(1000/portTICK_PERIOD_MS);
+const char *ssid = "motorola";
+const char *pass = "astinbiju44";
+int retry_num=0;
 
-        ledOFF();
-        vTaskDelay(1000/portTICK_PERIOD_MS);
-
-
-        
-    }
 
 
 
+static void wifi_event_handler(void *event_handler_arg, esp_event_base_t event_base, int32_t event_id,void *event_data){
+if(event_id == WIFI_EVENT_STA_START)
+{
+  printf("WIFI CONNECTING....\n");
+}
+else if (event_id == WIFI_EVENT_STA_CONNECTED)
+{
+  printf("WiFi CONNECTED\n");
+}
+else if (event_id == WIFI_EVENT_STA_DISCONNECTED)
+{
+  printf("WiFi lost connection\n");
+  if(retry_num<5){esp_wifi_connect();retry_num++;printf("Retrying to Connect...\n");}
+}
+else if (event_id == IP_EVENT_STA_GOT_IP)
+{
+  printf("Wifi got IP...\n\n");
+}
 }
 
-
-void app_main() {
-
-
-xTaskCreate(&led_blink,"LED_BLINK",512,NULL,5,NULL);
+void wifi_connection()
+{
+ 
+    esp_netif_init();
+    esp_event_loop_create_default();     // event loop                   
+    esp_netif_create_default_wifi_sta(); // WiFi station                      
+    wifi_init_config_t wifi_initiation = WIFI_INIT_CONFIG_DEFAULT();
+    esp_wifi_init(&wifi_initiation); //     
+    esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, wifi_event_handler, NULL);
+    esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, wifi_event_handler, NULL);
+    wifi_config_t wifi_configuration = {
+        .sta = {
+            .ssid = "",
+            .password = "",
+            
+           }
+    
+        };
+    strcpy((char*)wifi_configuration.sta.ssid, ssid);
+    strcpy((char*)wifi_configuration.sta.password, pass);    
+    //esp_log_write(ESP_LOG_INFO, "Kconfig", "SSID=%s, PASS=%s", ssid, pass);
+    esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_configuration);
+    // 3 - Wi-Fi Start Phase
+    esp_wifi_start();
+    esp_wifi_set_mode(WIFI_MODE_STA);
+    // 4- Wi-Fi Connect Phase
+    esp_wifi_connect();
+    printf( "wifi_init_softap finished. SSID:%s  password:%s",ssid,pass);
+    
+}
 
 
 
+void app_main(void)
+{
+nvs_flash_init();
+wifi_connection();
+    
 }
\ No newline at end of file