ESP8266 Community Forum

- Thu Feb 25, 2016 4:15 pm #41888 Hello,

I am trying to send an UDP broadcast with the following code:

Code: Select allvoid write_UDP(uint8_t *buffer, int length)
{
   static struct espconn *myEspconn;
   unsigned long remote_ip;
   ip_addr_t ipaddr;

   ets_uart_printf("Sending UDP data!\r\n");

   myEspconn = (struct espconn *)os_malloc(sizeof(struct espconn));
   myEspconn->type = ESPCONN_UDP;
   myEspconn->state = ESPCONN_NONE;
   myEspconn->proto.udp = (esp_udp *)os_malloc(sizeof(esp_udp));
   myEspconn->proto.udp->local_port = UDP_BROADCAST_PORT;
   myEspconn->proto.udp->remote_port = UDP_BROADCAST_PORT;
   remote_ip = IPADDR_NONE;
   IP4_ADDR(&ipaddr, 255, 255, 255, 255);
   os_memcpy(myEspconn->proto.udp->remote_ip, &ipaddr.addr, 4);
   ets_uart_printf("ip addres: %x\r\n", ipaddr.addr);
   ets_uart_printf("ip addres: " IPSTR "\r\n", IP2STR(&ipaddr.addr));
    if (!espconn_send(myEspconn, buffer, length))
       ets_uart_printf("espconn_send error!\r\n");
    else
       ets_uart_printf("espconn_send succeeded!\r\n");
}

Could anybody please help me to find out what is wrong here?

Thank you and best regards,

Wamor