ChibiOS Free Embedded RTOS

Code: Select all

    lwipInit(nullptr);
    sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
    if (sock == -1) {
        return -1;
    }
    
    /* broadcast */
    int broadcast = 1;
    setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &broadcast, sizeof(broadcast));

    // build the broadcast address
    struct sockaddr_in broadcast_address;
    broadcast_address.sin_family = AF_INET;
    broadcast_address.sin_port = htons(1234);
    broadcast_address.sin_addr.s_addr = INADDR_BROADCAST;

    char data[] = "Hello world";
    sendto(sock, data, sizeof(data), 0, (struct sockaddr*) &broadcast_address, sizeof(broadcast_address));