void recv(struct broadcast_conn *ptr, const rimeaddr_t * sender) {
char * val = (char *) packetbuf_dataptr();
printf("node %d: recv from %d: %d\n", rimeaddr_node_addr, *sender, *val);
void recv(struct broadcast_conn *ptr, const rimeaddr_t * sender) {
char * val = (char *) packetbuf_dataptr();
printf("node %d: recv from %d: %d\n", rimeaddr_node_addr, *sender, *val);