Meshtastic Messenger (CLI)

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JustinOros
2025-12-04 15:14:25 -07:00
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#!/usr/bin/env python3
# Description: Meshtastic Bluetooth Messenger (CLI) - Connect to and message via Meshtastic radios
# Usage: python3 meshtastic-messenger.py
# Author: Justin Oros
# Source: https://github.com/JustinOros
import sys
import time
import argparse
from datetime import datetime, timedelta
import meshtastic.serial_interface
try:
import meshtastic.ble_interface
BLE_AVAILABLE = True
except ImportError:
BLE_AVAILABLE = False
class MeshtasticCLI:
def __init__(self, debug_mode=False):
self.interface = None
self.nodes = {}
self.messages = []
self.exit_flag = False
self.selected_node = None
self.debug_mode = debug_mode
def setup_exit_handler(self):
"""Setup exit handler"""
# Exit via /quit command
pass
def exit_program(self):
"""Exit the program gracefully"""
print("\n\nExiting...")
self.exit_flag = True
if self.interface:
try:
self.interface.close()
except:
pass
sys.exit(0)
def scan_radios(self):
"""Scan for nearby Meshtastic radios via Bluetooth"""
print("Scanning for Meshtastic radios via Bluetooth (10 seconds)...")
print("Make sure your radio's Bluetooth is enabled!\n")
try:
import asyncio
from bleak import BleakScanner
async def scan():
print("Scanning all Bluetooth devices...")
devices = await BleakScanner.discover(timeout=10.0)
if self.debug_mode:
print(f"\nFound {len(devices)} total Bluetooth devices")
print("\nAll devices (for debugging):")
for d in devices:
print(f" - {d.name or 'Unknown'} ({d.address})")
# Filter for Meshtastic devices (very permissive)
meshtastic_devices = []
for d in devices:
name = d.name or ""
# Match Meshtastic patterns including emoji prefixes
# Common Meshtastic emojis: 📡 🏠 🚀 🌐 📻 and others
has_emoji = any(ord(c) > 127 for c in name) # Simple emoji detection
if (name and (
'meshtastic' in name.lower() or
name.startswith('!') or
'mesh' in name.lower() or
name.startswith('Meshtastic') or
(has_emoji and len(name) <= 10 and '_' in name) # Emoji_XXXX pattern
)):
meshtastic_devices.append({
'name': d.name,
'address': d.address
})
return meshtastic_devices, devices
meshtastic_devices, all_devices = asyncio.run(scan())
if not meshtastic_devices:
print("\nNo Meshtastic radios auto-detected.")
print("Would you like to manually select a device? (y/n): ", end='')
choice = input().strip().lower()
if choice == 'y':
# Let user pick from all devices
print("\nAll available devices:")
for i, d in enumerate(all_devices, 1):
print(f" {i}. {d.name or 'Unknown'} - {d.address}")
return [{'name': d.name or 'Unknown', 'address': d.address}
for d in all_devices]
return None
print(f"\nFound {len(meshtastic_devices)} Meshtastic radio(s):")
for i, device in enumerate(meshtastic_devices, 1):
print(f" {i}. {device['name']} - {device['address']}")
return meshtastic_devices
except Exception as e:
print(f"Bluetooth scan error: {e}")
print("\nTroubleshooting tips:")
print(" - Ensure Bluetooth is enabled on your computer")
print(" - Make sure your Meshtastic radio's Bluetooth is on")
print(" - Try running with sudo on Linux/Mac")
return None
def connect_radio(self, devices):
"""Prompt user to select and connect to a radio"""
while True:
try:
choice = input("\nEnter number to connect (or 'q' to quit): ").strip()
if choice.lower() == 'q':
sys.exit(0)
idx = int(choice) - 1
if 0 <= idx < len(devices):
device = devices[idx]
print(f"\nConnecting to {device['name']}...")
# Try BLE interface
if BLE_AVAILABLE:
try:
self.interface = meshtastic.ble_interface.BLEInterface(device['address'])
time.sleep(3)
print("Connected via BLE!")
return True
except Exception as e:
print(f"BLE connection failed: {e}")
return False
else:
print("BLE interface not available. Install bleak: pip install bleak")
return False
else:
print("Invalid selection. Try again.")
except ValueError:
print("Please enter a valid number.")
except Exception as e:
print(f"Connection failed: {e}")
return False
def on_receive(self, packet, interface=None):
"""Callback for received packets"""
if self.debug_mode:
print(f"\n[DEBUG] Packet received: {packet.keys() if isinstance(packet, dict) else type(packet)}")
try:
# Store node info
if 'from' in packet:
node_id = packet['from']
node_short_id = f"!{node_id:08x}"
node_long_name = packet.get('fromId', node_short_id)
if node_id not in self.nodes:
self.nodes[node_id] = {
'id': node_id,
'last_seen': datetime.now(),
'name': node_long_name,
'short_id': node_short_id
}
else:
self.nodes[node_id]['last_seen'] = datetime.now()
if 'fromId' in packet:
self.nodes[node_id]['name'] = packet['fromId']
# Store and display messages
if 'decoded' in packet:
decoded = packet['decoded']
if self.debug_mode:
print(f"[DEBUG] Decoded packet: portnum={decoded.get('portnum')}, has text={('text' in decoded)}")
# Check if it's a text message
if (decoded.get('portnum') == 'TEXT_MESSAGE_APP' or
decoded.get('portnum') == 1 or # TEXT_MESSAGE_APP enum value
'text' in decoded):
# Extract text - handle both string and bytes
text_content = decoded.get('text', '')
# If text is bytes, decode it
if isinstance(text_content, bytes):
text_content = text_content.decode('utf-8', errors='ignore')
# If still no text, try payload
if not text_content and 'payload' in decoded:
payload = decoded.get('payload', '')
if isinstance(payload, bytes):
text_content = payload.decode('utf-8', errors='ignore')
elif isinstance(payload, dict):
text_content = payload.get('text', '')
if text_content: # Only store if there's actual text
from_name = packet.get('fromId', 'Unknown')
from_short = f"!{packet.get('from', 0):08x}"
to_name = packet.get('toId', 'Broadcast')
to_short = f"!{packet.get('to', 0):08x}" if packet.get('to') != 0xffffffff else 'Broadcast'
msg = {
'from': from_name,
'from_short': from_short,
'to': to_name,
'to_short': to_short,
'text': text_content,
'time': datetime.now()
}
self.messages.append(msg)
# Print new messages in real-time
time_str = msg['time'].strftime('%Y-%m-%d %H:%M:%S')
print(f"\n[{time_str}] {msg['from']} ({msg['from_short']}) -> {msg['to']} ({msg['to_short']}): {msg['text']}")
print("> ", end='', flush=True)
except Exception as e:
if self.debug_mode:
print(f"[DEBUG] Error processing packet: {e}")
def list_recent_nodes(self):
"""List nodes seen in the last hour"""
one_hour_ago = datetime.now() - timedelta(hours=1)
recent_nodes = {k: v for k, v in self.nodes.items()
if v['last_seen'] > one_hour_ago}
if not recent_nodes:
print("\nNo nodes detected in the last hour.")
print("Waiting for node activity...")
return None
print(f"\nNodes active in the last hour ({len(recent_nodes)}):")
node_list = list(recent_nodes.values())
for i, node in enumerate(node_list, 1):
time_ago = (datetime.now() - node['last_seen']).seconds // 60
print(f" {i}. {node['name']} (seen {time_ago}m ago)")
return node_list
def select_contact(self, node_list):
"""Prompt user to select a contact"""
while True:
try:
choice = input("\nEnter number to message (or 'b' for broadcast, 'r' to refresh): ").strip()
if choice.lower() == 'b':
self.selected_node = None
print("Broadcasting to all nodes")
return True
elif choice.lower() == 'r':
return False # Signal to refresh
idx = int(choice) - 1
if 0 <= idx < len(node_list):
self.selected_node = node_list[idx]
print(f"Messaging: {self.selected_node['name']}")
return True
else:
print("Invalid selection. Try again.")
except ValueError:
print("Please enter a valid number.")
def display_messages(self):
"""Display all past messages"""
if not self.messages:
print("\nNo messages yet.")
return
print(f"\n--- Message History ({len(self.messages)} messages) ---")
for msg in self.messages[-20:]: # Show last 20 messages
time_str = msg['time'].strftime('%Y-%m-%d %H:%M:%S')
print(f"[{time_str}] {msg['from']} ({msg['from_short']}) -> {msg['to']} ({msg['to_short']}): {msg['text']}")
print("--- End of messages ---\n")
def send_message(self, text):
"""Send a message"""
try:
time_str = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
if self.selected_node:
# Direct message
self.interface.sendText(text, destinationId=self.selected_node['id'])
short_id = self.selected_node.get('short_id', f"!{self.selected_node['id']:08x}")
to_display = f"{self.selected_node['name']} ({short_id})"
print(f"[{time_str}] You -> {to_display}: {text}")
else:
# Broadcast
self.interface.sendText(text)
print(f"[{time_str}] You -> Broadcast: {text}")
except Exception as e:
print(f"Failed to send message: {e}")
def message_loop(self):
"""Main messaging loop"""
print("\n=== Messaging Interface ===")
print("Type your message and press ENTER to send")
print("Type /quit to exit\n")
while not self.exit_flag:
try:
msg = input("> ").strip()
# Check for quit command
if msg.lower() == '/quit':
self.exit_program()
break
if self.exit_flag:
break
if msg:
self.send_message(msg)
except KeyboardInterrupt:
print("\n\nExiting...")
break
except EOFError:
print("\n\nExiting...")
break
# Clean up
if self.interface:
try:
self.interface.close()
except:
pass
def run(self):
"""Main program flow"""
self.setup_exit_handler()
# Step 1: Scan for radios
devices = self.scan_radios()
if not devices:
return
# Step 2: Connect to radio
if not self.connect_radio(devices):
return
# Setup packet callback using the correct method
print("Setting up message listener...")
callback_set = False
try:
# Try the pub/sub method for newer meshtastic versions
from pubsub import pub
def on_receive_wrapper(packet, interface=None):
self.on_receive(packet, interface)
pub.subscribe(on_receive_wrapper, "meshtastic.receive")
print("✓ Message listener active (pub/sub)")
callback_set = True
except Exception as e:
if self.debug_mode:
print(f"Pub/sub setup failed: {e}")
if not callback_set:
# Fallback to old callback method
try:
self.interface.addReceiveCallback(self.on_receive)
print("✓ Message listener active (callback)")
callback_set = True
except AttributeError:
print("⚠ Warning: Could not set up message callback.")
# Step 3: Wait for node discovery
print("\nDiscovering nodes and syncing data...")
print("This may take 10-20 seconds...\n")
# Get nodedb to populate nodes
try:
if hasattr(self.interface, 'nodesByNum'):
for node_id, node_info in self.interface.nodesByNum.items():
self.nodes[node_id] = {
'id': node_id,
'last_seen': datetime.fromtimestamp(node_info.get('lastHeard', 0)) if node_info.get('lastHeard') else datetime.now(),
'name': node_info.get('user', {}).get('longName', f"!{node_id:08x}"),
'short_id': f"!{node_id:08x}"
}
print(f"Loaded {len(self.nodes)} nodes from radio memory")
except Exception as e:
if self.debug_mode:
print(f"Note: Could not load node database: {e}")
time.sleep(10)
# Step 4: Select contact
while not self.exit_flag:
node_list = self.list_recent_nodes()
if node_list is None:
time.sleep(5)
continue
if self.select_contact(node_list):
break
# Step 5: Display message history
self.display_messages()
# Step 6: Enter messaging loop
self.message_loop()
if __name__ == "__main__":
# Parse command line arguments
parser = argparse.ArgumentParser(description='Meshtastic Bluetooth CLI Messenger')
parser.add_argument('-d', '--debug', action='store_true',
help='Enable debug mode to see packet information')
args = parser.parse_args()
try:
cli = MeshtasticCLI(debug_mode=args.debug)
cli.run()
except KeyboardInterrupt:
print("\n\nExiting...")
sys.exit(0)
except Exception as e:
print(f"\nError: {e}")
sys.exit(1)