for(;;) {
barrier_block(&send_barrier);
barrier_reset(&send_barrier, NUM_SENSORS + 1);
if(amRadioSend(AM_BROADCAST_ADDR, &send_msg, sizeof(sensor_data_t), AM_SENSOR_DATA_MSG) == SUCCESS) {
for(;;) {
barrier_block(&send_barrier);
barrier_reset(&send_barrier, NUM_SENSORS + 1);
if(amRadioSend(AM_BROADCAST_ADDR, &send_msg, sizeof(sensor_data_t), AM_SENSOR_DATA_MSG) == SUCCESS) {