diff --git a/barcode_server/notifier/serial.py b/barcode_server/notifier/serial.py
index b5f8d7d..53d2500 100644
--- a/barcode_server/notifier/serial.py
+++ b/barcode_server/notifier/serial.py
@@ -1,5 +1,6 @@
 import serial
 import logging
+import time as sleep
 
 from prometheus_async.aio import time
 
@@ -18,8 +19,16 @@ class SerialNotifier(BarcodeNotifier):
         self.inputDevicePathA = None
         self.inputDevicePathB = None
         self.usbA = serial.Serial(pathA, 9600, timeout=2)
+        sleep.sleep(3);
+        self.usbA.write(b'Initialize - A')
+        sleep.sleep(1);
+        self.usbA.write(b'1tInitialize - A')
         if pathB is not None:
             self.usbB = serial.Serial(pathB, 9600, timeout=2)
+            sleep.sleep(3);
+            self.usbB.write(b'Initialize - B')
+            sleep.sleep(1);
+            self.usbB.write(b'1tInitialize - B')
 
     @time(SERIAL_NOTIFIER_TIME)
     async def _send_event(self, event: BarcodeEvent):