refactored heavily

transport_serial.py

@@ -0,0 +1,21 @@
+# ---------------------------------------------------------------------------
+# Transport over Serial
+# ---------------------------------------------------------------------------
+import serial
+
+from transport import GnssTransport
+
+
+class SerialTransport(GnssTransport):
+    def __init__(self, port: str, baudrate: int):
+        self._ser = serial.Serial(port, baudrate, timeout=1)
+
+    def read(self, n: int) -> bytes:
+        return self._ser.read(n)
+
+    def write(self, data: bytes) -> None:
+        self._ser.write(data)
+
+    def close(self) -> None:
+        if self._ser.is_open:
+            self._ser.close()