esp32之wifi-ipv6（转）

后续，会更新ipv6的ros2实现，转一下官方示例：

      #include "WiFi.h"
      #define STA_SSID "**********"
      #define STA_PASS "**********"
      #define AP_SSID "esp32-v6"
      static volatile bool wifi_connected = false;
      WiFiUDP ntpClient;
      void wifiOnConnect(){
          Serial.println("STA Connected");
          Serial.print("STA IPv4: ");
          Serial.println(WiFi.localIP());
          ntpClient.begin(2390);
      }
      void wifiOnDisconnect(){
          Serial.println("STA Disconnected");
          delay(1000);
          WiFi.begin(STA_SSID, STA_PASS);
      }
      void wifiConnectedLoop(){
       //lets check the time
       const int NTP_PACKET_SIZE = 48;
        byte ntpPacketBuffer[NTP_PACKET_SIZE];
        IPAddress address;
        WiFi.hostByName("time.nist.gov", address);
       memset(ntpPacketBuffer, 0, NTP_PACKET_SIZE);
        ntpPacketBuffer[0] = 0b11100011;   // LI, Version, Mode
        ntpPacketBuffer[1] = 0;     // Stratum, or type of clock
        ntpPacketBuffer[2] = 6;     // Polling Interval
        ntpPacketBuffer[3] = 0xEC;  // Peer Clock Precision
       // 8 bytes of zero for Root Delay & Root Dispersion
        ntpPacketBuffer[12]  = 49;
        ntpPacketBuffer[13]  = 0x4E;
        ntpPacketBuffer[14]  = 49;
        ntpPacketBuffer[15]  = 52;
        ntpClient.beginPacket(address, 123); //NTP requests are to port 123
        ntpClient.write(ntpPacketBuffer, NTP_PACKET_SIZE);
        ntpClient.endPacket();
        delay(1000);
       int packetLength = ntpClient.parsePacket();
       if (packetLength){
         if(packetLength >= NTP_PACKET_SIZE){
            ntpClient.read(ntpPacketBuffer, NTP_PACKET_SIZE);
          }
          ntpClient.flush();
         uint32_t secsSince1900 = (uint32_t)ntpPacketBuffer[40] << 24 | (uint32_t)ntpPacketBuffer[41] << 16 | (uint32_t)ntpPacketBuffer[42] << 8 | ntpPacketBuffer[43];
         //Serial.printf("Seconds since Jan 1 1900: %u\n", secsSince1900);
         uint32_t epoch = secsSince1900 - 2208988800UL;
         //Serial.printf("EPOCH: %u\n", epoch);
         uint8_t h = (epoch  % 86400L) / 3600;
         uint8_t m = (epoch  % 3600) / 60;
         uint8_t s = (epoch % 60);
          Serial.printf("UTC: %02u:%02u:%02u (GMT)\n", h, m, s);
        }
        delay(9000);
      }
      void WiFiEvent(WiFiEvent_t event){
         switch(event) {
             case ARDUINO_EVENT_WIFI_AP_START:
                 //can set ap hostname here
                  WiFi.softAPsetHostname(AP_SSID);
                 //enable ap ipv6 here
                  WiFi.softAPenableIpV6();
                 break;
             case ARDUINO_EVENT_WIFI_STA_START:
                 //set sta hostname here
                  WiFi.setHostname(AP_SSID);
                 break;
             case ARDUINO_EVENT_WIFI_STA_CONNECTED:
                 //enable sta ipv6 here
                  WiFi.enableIpV6();
                 break;
             case ARDUINO_EVENT_WIFI_STA_GOT_IP6:
                  Serial.print("STA IPv6: ");
                  Serial.println(WiFi.localIPv6());
                 break;
             case ARDUINO_EVENT_WIFI_AP_GOT_IP6:
                  Serial.print("AP IPv6: ");
                  Serial.println(WiFi.softAPIPv6());
                 break;
             case ARDUINO_EVENT_WIFI_STA_GOT_IP:
                  wifiOnConnect();
                  wifi_connected = true;
                 break;
             case ARDUINO_EVENT_WIFI_STA_DISCONNECTED:
                  wifi_connected = false;
                  wifiOnDisconnect();
                 break;
             default:
                 break;
          }
      }
      void setup(){
          Serial.begin(115200);
          WiFi.disconnect(true);
          WiFi.onEvent(WiFiEvent);
          WiFi.mode(WIFI_MODE_APSTA);
          WiFi.softAP(AP_SSID);
          WiFi.begin(STA_SSID, STA_PASS);
      }
      void loop(){
         if(wifi_connected){
              wifiConnectedLoop();
          }
         while(Serial.available()) Serial.write(Serial.read());
      }
  
 

文章来源: zhangrelay.blog.csdn.net，作者：zhangrelay，版权归原作者所有，如需转载，请联系作者。

原文链接：zhangrelay.blog.csdn.net/article/details/120589661