> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lagerdata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Version 0.3.17

> January 29, 2026

## <u>Features</u>

### SPI Communication Support

* Added new `lager spi` command for SPI (Serial Peripheral Interface) communication via LabJack T7
* Subcommands: `read`, `write`, `transfer`, `config`
* Supports all standard SPI parameters: mode (0-3), bit order (MSB/LSB), frequency, chip select polarity, word size (8/16/32-bit)
* Multiple output formats: hex, bytes, JSON
* Data input via hex string (`--data`) or binary file (`--data-file`)
* Automatic padding and truncation for transfer operations

### SPI Python API

* New `SPINet` class accessible via `Net.get('my_spi', NetType.SPI)`
* Methods: `config()`, `read()`, `read_write()`, `transfer()`, `write()`
* Full-duplex read/write support with configurable chip select behavior

## <u>Bug Fixes</u>

### LabJack Handle Sharing

* Fixed an issue where GPIO operations would close the LabJack device and kill active SPI connections
* ADC, DAC, and GPIO modules now use a global shared handle manager instead of opening and closing per operation
* Added atexit cleanup handler to properly release hardware resources on process exit

## <u>Improvements</u>

### LabJack SPI Hardware Limitation Workaround

* Automatically forces 800kHz clock speed for SPI transactions of 3 or more bytes when a lower frequency is requested, due to a LabJack T7 hardware limitation
* Prints a warning when this override occurs so users are aware of the adjusted frequency
* LabJack T7 firmware 1.0332 or later is required for SPI support

### Deployment

* Improved Lager Box deployment scripts

## <u>Installation</u>

To install this version:

```bash theme={null}
pip install lager-cli==0.3.17
```

To upgrade from a previous version:

```bash theme={null}
pip install --upgrade lager-cli
```

## Resources

[View Release on PyPI](https://pypi.org/project/lager-cli/0.3.17/)