Getting wifi connected on an ESP32 in C++ - c++

Question

I have been trying to get my ESP32 connected to Wifi with C++. I have a small issue which I don't understand at all. And will eventually getting it connected to AWS IOT. I have it all working perfectly with the Arduino native language with no issues, but when trying to get it running with C++ I can't even get the wifi connecting.
When I read the localIP back in the loop when running the connectWifi() function (arduino code) it reads back the IP easily and I already have this with other code working with AWS IOT perfectly. When trying to run the initialiseWifi() function (C++) it doesn't seem to work and it returns an IP of 0.0.0.0.
I got this code from a ESP32 AWS IOT tutorial using C++ found on Visual Studio PlatformIO, and I also couldn't get the tutorial working either.
I feel like this is a simple error and I am new to C++, so am hoping someone can point it out so I can fix it up please!
#include "secrets.h"
#include <WiFiClientSecure.h>
#include <MQTTClient.h>
#include <ArduinoJson.h>
#include "WiFi.h"
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <unistd.h>
#include <limits.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_loop.h"
#include "esp_log.h"
#include "esp_vfs_fat.h"
#include "driver/sdmmc_host.h"
#include "lwip/inet.h"
#include "lwip/dns.h"
const int CONNECTED_BIT = BIT0;
WiFiClientSecure net = WiFiClientSecure();
MQTTClient client = MQTTClient(256);
void messageHandler(String &topic, String &payload) {
Serial.println("incoming: " + topic + " - " + payload);
}
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:
break;
case SYSTEM_EVENT_STA_DISCONNECTED:
/* This is a workaround as ESP32 WiFi libs don't currently
auto-reassociate. */
esp_wifi_connect();
break;
default:
break;
}
return ESP_OK;
}
void initialise_wifi(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) );
//Allocate storage for the struct
wifi_config_t wifi_config = {};
//Assign ssid & password strings
strcpy((char*)wifi_config.sta.ssid, "XXXXXXXXXX");
strcpy((char*)wifi_config.sta.password, "XXXXXXXXXXX");
wifi_config.sta.bssid_set = false;
// 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(WIFI_IF_STA, &wifi_config) );
ESP_ERROR_CHECK( esp_wifi_start() );
}
void connectWifi() {
WiFi.mode(WIFI_STA);
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
Serial.println("Connecting to Wi-Fi");
while (WiFi.status() != WL_CONNECTED){
delay(500);
Serial.print(".");
}
printf("\n");
printf("Hello world!\n");
printf("Local IP: ");
Serial.println(WiFi.localIP());
}
void setup() {
Serial.begin(9600);
//connectWifi();
initialise_wifi();
}
void loop() {
Serial.println(WiFi.localIP());
delay(1000);
}