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74 lines
2.6 KiB
Python
74 lines
2.6 KiB
Python
"""Interactive text chat demo.
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Purpose: demonstrate bidirectional text chat loop.
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Transport scope: Serial default, optional TCP/BLE.
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Behavior: prints incoming messages and sends each typed line as text.
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Expected output: incoming sender/text lines and sent messages reaching peers.
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Cleanup/error handling: explicit connect errors and graceful Ctrl+C / EOF close.
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"""
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import argparse
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from typing import Any, Optional, Union
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from pubsub import pub
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import meshtastic.serial_interface
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import meshtastic.tcp_interface
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import meshtastic.ble_interface
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from meshtastic.mesh_interface import MeshInterface
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def onReceive(packet: dict, interface: MeshInterface) -> None: # pylint: disable=unused-argument
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"""called when a packet arrives"""
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text: Optional[str] = packet.get("decoded", {}).get("text")
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if text:
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sender: str = packet.get("fromId", "unknown")
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print(f"{sender}: {text}")
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def onConnection(interface: MeshInterface, topic: Any = pub.AUTO_TOPIC) -> None: # pylint: disable=unused-argument
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"""called when we (re)connect to the radio"""
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print("Connected. Type a message and press Enter to send. Ctrl+C to exit.")
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parser = argparse.ArgumentParser(description="Meshtastic text chat demo")
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group = parser.add_mutually_exclusive_group()
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group.add_argument("--host", help="Connect via TCP to this hostname or IP")
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group.add_argument("--ble", help="Connect via BLE to this MAC address or device name")
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args = parser.parse_args()
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pub.subscribe(onReceive, "meshtastic.receive")
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pub.subscribe(onConnection, "meshtastic.connection.established")
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iface: Optional[Union[
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meshtastic.tcp_interface.TCPInterface,
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meshtastic.ble_interface.BLEInterface,
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meshtastic.serial_interface.SerialInterface
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]] = None
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# defaults to serial, use --host for TCP or --ble for Bluetooth
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try:
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if args.host:
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# note: timeout only applies after connection, not during the initial connect attempt
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# TCPInterface.myConnect() calls socket.create_connection() without a timeout
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iface = meshtastic.tcp_interface.TCPInterface(hostname=args.host, timeout=10)
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elif args.ble:
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iface = meshtastic.ble_interface.BLEInterface(address=args.ble, timeout=10)
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else:
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iface = meshtastic.serial_interface.SerialInterface(timeout=10)
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except KeyboardInterrupt as exc:
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raise SystemExit(0) from exc
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except Exception as e:
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print(f"Error: Could not connect. {e}")
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raise SystemExit(1) from e
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assert iface is not None
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try:
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while True:
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line = input()
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if line:
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iface.sendText(line)
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except KeyboardInterrupt:
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pass
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except EOFError:
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pass
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finally:
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if iface:
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iface.close()
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