Add serial and Arduino file

barcode_server/notifier/serial.py

@@ -0,0 +1,23 @@
+import serial
+import logging
+# import time as sleep
+
+from prometheus_async.aio import time
+
+from barcode_server.barcode import BarcodeEvent
+from barcode_server.notifier import BarcodeNotifier
+from barcode_server.stats import SERIAL_NOTIFIER_TIME
+
+LOGGER = logging.getLogger(__name__)
+
+class SerialNotifier(BarcodeNotifier):
+
+    def __init__(self, path: str, usb: serial):
+        super().__init__()
+        self.path = path
+        self.usb = usb
+
+    @time(SERIAL_NOTIFIER_TIME)
+    async def _send_event(self, event: BarcodeEvent):
+        self.usb.write(event.barcode.encode())
+        LOGGER.debug(f"Notified {self.path}: {event.barcode}")