--- id: python-using-library title: using the Meshtastic-python library sidebar_label: Using the meshtastic Python library --- An example using Python 3 code to send a message to the mesh, get and set a radio configuration preference: ```python import meshtastic import meshtastic.serial_interface # By default will try to find a meshtastic device, # otherwise provide a device path like /dev/ttyUSB0 interface = meshtastic.serial_interface.SerialInterface() # or something like this # interface = meshtastic.serial_interface.SerialInterface(devPath='/dev/cu.usbmodem53230050571') # or sendData to send binary data, see documentations for other options. interface.sendText("hello mesh") ourNode = interface.getNode('^local') print(f'Our node preferences:{ourNode.radioConfig.preferences}') # update a value print('Changing a preference...') ourNode.radioConfig.preferences.gps_update_interval = 60 print(f'Our node preferences now:{ourNode.radioConfig.preferences}') ourNode.writeConfig() interface.close() ``` Another example using Python 3 code to send a message to the mesh when WiFi is enabled: ```python import time import meshtastic import meshtastic.tcp_interface from pubsub import pub def onReceive(packet, interface): # called when a packet arrives print(f"Received: {packet}") def onConnection(interface, topic=pub.AUTO_TOPIC): # called when we (re)connect to the radio # defaults to broadcast, specify a destination ID if you wish interface.sendText("hello mesh") pub.subscribe(onReceive, "meshtastic.receive") pub.subscribe(onConnection, "meshtastic.connection.established") interface = meshtastic.tcp_interface.TCPInterface(hostname='192.168.68.74') while True: time.sleep(1000) interface.close() ``` Note: Be sure to change the IP address in the code above to a valid IP address for your setup. You can get and update settings like this: ```python import meshtastic import meshtastic.serial_interface interface = meshtastic.serial_interface.SerialInterface() ourNode = interface.getNode('^local') print(ourNode.radioConfig.preferences) ourNode.radioConfig.preferences.gps_update_interval = 60 print(ourNode.radioConfig.preferences) ourNode.writeConfig() interface.close() ``` For the rough notes/implementation plan see [TODO](https://github.com/meshtastic/Meshtastic-python/blob/master/TODO). See the API for full details of how to use the library. ## A note to developers of this lib We use the visual-studio-code default python formatting conventions (autopep8). So if you use that IDE you should be able to use "Format Document" and not generate unrelated diffs. If you use some other editor, please don't change formatting on lines you haven't changed. If you need to build a new release you'll need: ```shell title="Command" apt install pandoc sudo pip3 install markdown pandoc webencodings pyparsing twine autopep8 ```