If you want to add LoRaWAN communication capability to your Raspberry Pi Pico project, you can use the following Python libraries:

1. [Pycom](https://pypi.org/project/pycom/): This library provides a high-level API for working with Pycom devices, including the Pycom LoPy, which supports both Wi-Fi and LoRaWAN communication.

2. [PyLoRa](https://pypi.org/project/pyLoRa/): This library provides a simple API for sending and receiving LoRaWAN packets with a Pycom device.

3. [LoRaSim](https://pypi.org/project/LoRaSim/): This is a simulation tool for LoRaWAN networks. It can be used to test your application without the need for physical hardware.

4. [TheThingsNetwork](https://www.thethingsnetwork.org/docs/applications/python/): This is a global public LoRaWAN network, which provides free access to its infrastructure for IoT devices. TheThingsNetwork also provides a [Python library](https://pypi.org/project/ttn/) for working with its API.

Note: These libraries are just examples, and there might be other libraries that support LoRaWAN communication with Raspberry Pi Pico as well.
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