Add serial and Arduino file

barcode_server/__init__.py

@@ -1 +1 @@
-__version__ = "2.3.0"
+__version__ = "2.3.1"

barcode_server/config.py

@@ -213,6 +213,15 @@ class AppConfig(ConfigBase):
         required=True
     )
 
+    SERIAL_PATH = StringConfigEntry(
+        key_path=[
+            CONFIG_NODE_ROOT,
+            CONFIG_NODE_SERIAL,
+            "path"
+        ],
+        required=False
+    )
+
     DEVICE_PATTERNS = ListConfigEntry(
         item_type=RegexConfigEntry,
         item_args={

barcode_server/const.py

@@ -22,6 +22,7 @@ CONFIG_NODE_ROOT = "barcode_server"
 CONFIG_NODE_SERVER = "server"
 CONFIG_NODE_HTTP = "http"
 CONFIG_NODE_MQTT = "mqtt"
+CONFIG_NODE_SERIAL = "serial"
 
 CONFIG_NODE_STATS = "stats"
 CONFIG_NODE_PORT = "port"

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}")

barcode_server/stats.py

@@ -25,4 +25,5 @@ REST_TIME_DEVICES = REST_TIME.labels(endpoint=ENDPOINT_DEVICES)
 NOTIFIER_TIME = Summary('notifier_processing_seconds', 'Time spent in a notifier', ['type'])
 WEBSOCKET_NOTIFIER_TIME = NOTIFIER_TIME.labels(type='websocket')
 HTTP_NOTIFIER_TIME = NOTIFIER_TIME.labels(type='http')
+SERIAL_NOTIFIER_TIME = NOTIFIER_TIME.labels(type='serial')
 MQTT_NOTIFIER_TIME = NOTIFIER_TIME.labels(type='mqtt')

barcode_server/webserver.py

@@ -1,3 +1,4 @@
+import serial
 import asyncio
 import logging
 from typing import Dict
@@ -13,6 +14,7 @@ from barcode_server.const import *
 from barcode_server.notifier import BarcodeNotifier
 from barcode_server.notifier.http import HttpNotifier
 from barcode_server.notifier.mqtt import MQTTNotifier
+from barcode_server.notifier.serial import SerialNotifier
 from barcode_server.notifier.ws import WebsocketNotifier
 from barcode_server.stats import REST_TIME_DEVICES, WEBSOCKET_CLIENT_COUNT
 from barcode_server.util import input_device_to_dict
@@ -33,6 +35,8 @@ class Webserver:
         self.barcode_reader = barcode_reader
         self.barcode_reader.add_listener(self.on_barcode)
 
+        self.usb = {}
+
         self.notifiers: Dict[str, BarcodeNotifier] = {}
         if config.HTTP_URL.value is not None:
             http_notifier = HttpNotifier(
@@ -54,6 +58,11 @@ class Webserver:
             )
             self.notifiers["mqtt"] = mqtt_notifier
 
+        if config.SERIAL_PATH.value is not None:
+            self.usb = serial.Serial(config.SERIAL_PATH.value, 9600, timeout=2)
+            serial_notifier = SerialNotifier(config.SERIAL_PATH.value, self.usb)
+            self.notifiers["serial"] = serial_notifier
+
     async def start(self):
         # start detecting and reading barcode scanners
         await self.barcode_reader.start()