### Importing a MicroPython Module

Source: https://github.com/betaravener/micropython-hw-lib/blob/master/README.md

Demonstrates how to import a custom Python module into a MicroPython environment. Ensure the module file is present on the MicroPython filesystem.

```python
from pcf8574 import PCF8574
```

--------------------------------

### Cross-compiling Python to MicroPython Bytecode

Source: https://github.com/betaravener/micropython-hw-lib/blob/master/README.md

Shows how to use the `mpy-cross` tool to compile a Python script into MicroPython bytecode (.mpy file). This can save space and improve import times. The `MICROPYTHON_ROOT_DIR` should point to your MicroPython source directory.

```bash
MICROPYTHON_ROOT_DIR/mpy-cross/mpy-cross pcf8574.py
```

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