feat: example scripts (simple_rx, simple_tx, ping_pong) with shared donglora.py helper

examples/simple_tx.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+"""Transmit a single LoRa packet.
+
+Usage:
+    uv run examples/simple_tx.py [PORT] [MESSAGE]
+"""
+# /// script
+# requires-python = ">=3.10"
+# dependencies = ["cobs", "pyserial"]
+# ///
+
+import sys
+sys.path.insert(0, __import__("pathlib").Path(__file__).parent.as_posix())
+import donglora as dl  # noqa: E402
+
+port = None
+message = "Hello from DongLoRa!"
+
+args = sys.argv[1:]
+if args and not args[0].startswith("/dev"):
+    message = " ".join(args)
+elif args:
+    port = args[0]
+    if len(args) > 1:
+        message = " ".join(args[1:])
+
+ser = dl.connect(port)
+print(dl.send(ser, "SetConfig", config=dl.DEFAULT_CONFIG))
+print(dl.send(ser, "Transmit", payload=message.encode()))
+print(f"Sent: {message!r}")