how can I send integer array in unicast example of contiki?

Question

In the example-unicast.c program through packetbuf function, I can send string from sender node to receiver node. Now instead of sending string i want to send integer data array. I was trying this packetbuf_copy() I am using contiki 3.0. thank you in advance.

Answer 1

packetbuf_copyfrom() works with other types of arrays, not only with strings:

int array[0] = {1, 2, 3, 4};
packetbuf_copyfrom(array, sizeof(array));    
...
unicast_send(&uc, &addr);

On receiver's side, use packetbuf_dataptr() or packetbuf_copyto() to access the data.

Answer 2

You can use uip_udp_packet_send(struct uip_udp_conn *c, const void *data, int len). The code will be:

#define  UDP_PORT 1223   
uint8_t array[4] = {1, 2, 3, 4};
struct uip_udp_conn *unicastcon;
unicastcon= udp_new(&receiver_ipaddr,UIP_HTONS(UDP_PORT), NULL);
udp_bind(unicastcon, UIP_HTONS(UDP_PORT));
uip_udp_packet_send(unicastcon,array,sizeof(array));