Change the serial daemon to use sockets

daemons/net-to-serial.py

@@ -0,0 +1,44 @@
+import serial
+import asyncio
+
+
+class SerialDaemon:
+    def __init__(self):
+        self.ser = serial.Serial('/dev/pts/7')  # WIP
+        self.ser.baudrate = 115200
+
+    def __del__(self):
+        try:
+            self.ser.close()
+        except AttributeError:
+            pass
+
+    async def handle_echo(self, reader, writer):
+        data = await reader.read(100)
+        message = data.decode()
+        addr = writer.get_extra_info('peername')
+
+        print(f"Received {message!r} from {addr!r}")
+
+        self.ser.write(data)
+        response = self.read_until()
+        print(f"Send: {response!r}")
+        writer.write(response)
+        await writer.drain()
+
+        print("Close the connection")
+        writer.close()
+
+
+async def main():
+    sd = SerialDaemon()
+    server = await asyncio.start_server(
+        sd.handle_echo, '127.0.0.1', 2560)  # WIP
+    addrs = ', '.join(str(sock.getsockname()) for sock in server.sockets)
+    print(f'Serving on {addrs}')
+
+    async with server:
+        await server.serve_forever()
+
+if __name__ == "__main__":
+    asyncio.run(main())