   int i;
   long t;
   short v;
-  digitalWrite(DEBUG_LED2, HIGH);
+  digitalWrite(DEBUG_LED1, HIGH);
   for (i = 0; i < 1000; i++) {
     v = analogRead(PD_SCREEN_PIN);
     t = time_us;

    send_line();
    delayMicroseconds(450);
  }
  digitalWrite(DEBUG_LED2, LOW);
  send("end");
  send_line();
}

    init_clock();
    clock.is_synced = true;
    interrupts();
    led_state = LOW;
    digitalWrite(DEBUG_LED1, LOW);
    digitalWrite(DEBUG_LED2, LOW);
    send_ack(CMD_SYNC_ZERO);
  } else if (cmd == CMD_TIME_NOW) {
    send("t ");
