> ## 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 0.3.19

> February 9, 2026

## <u>Features</u>

### I2C Protocol Support

* New `lager i2c` commands for I2C bus communication, including `config`, `scan`, and `transfer` subcommands
* Supports Aardvark USB-I2C and LabJack T7 hardware adapters
* `lager i2c scan` detects all devices on the I2C bus and reports their addresses
* `lager i2c transfer` performs read, write, and write-then-read transactions
* `lager i2c config` sets bus frequency and pull-up resistor options

### FT232H Adapter Support

* Added the FTDI FT232H USB adapter as a backend for SPI and GPIO protocols
* Provides an affordable, widely-available option for SPI communication with target devices

### Joulescope JS220 Support

* Added support for the Joulescope JS220 precision power analyzer
* The JS220 is now automatically detected during instrument discovery
* Use existing `lager watt` commands to read power measurements from the Joulescope

### Net TUI Enhancements

* The `lager nets` interactive TUI now includes Rename and Delete buttons for managing nets directly
* Arrow key navigation works for all TUI buttons and selections
* Updated color scheme with Lager branding
* The `lager nets` list output format now matches the TUI layout for consistency

## <u>Bug Fixes</u>

* Fixed SPI transactions to use separate TX and RX data arrays, resolving data corruption on simultaneous read/write operations
* Fixed SPI Slave Select polarity handling to work across different versions of the aardvark\_py library
* Fixed Aardvark adapter initialization to use the correct SPI+GPIO mode instead of I2C mode
* Fixed `aa_spi_configure` to pass clock polarity and phase as separate arguments
* Fixed Aardvark adapter to open by port number instead of serial number matching, improving reliability when multiple adapters are connected

## <u>Improvements</u>

* SPI and GPIO nets can no longer be created on the same pins, preventing configuration conflicts
* Improved help messages for SPI commands
* Added validation for debug net types, preventing invalid net type configurations

## <u>Installation</u>

To install this version:

```bash theme={null}
pip install lager-cli==0.3.19
```

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/0.3.19/)