Function internetConnection

src/core/net_utils.cpp:6–15

#include <sstream>

bool internetConnection() {
    WiFiClient client;
    const char *host = "8.8.8.8"; // Google DNS
    const uint16_t port = 53;     // DNS Port

    if (client.connect(host, port)) {
        client.stop();
        return true; // Connected
    } else return false;
}

String getManufacturer(const String &mac) {
    if (!internetConnection()) { return "NO_INTERNET_ACCESS"; }