Nets

Nets are the core abstraction in Lager for representing physical test points, signals, or buses on your device under test. Each net maps a friendly name to a specific instrument channel.

Syntax

lager nets [OPTIONS] [COMMAND]

Global Options

Option	Description
`--box TEXT`	Lagerbox name or IP address
`--help`	Show help message and exit

Commands

Command	Description
(none)	List all saved nets (default)
`delete`	Delete a specific net by name and type
`delete-all`	Delete all saved nets (dangerous)
`rename`	Rename an existing net
`create`	Create a new net
`create-all`	Auto-create all available nets from connected instruments
`create-batch`	Create multiple nets from a JSON file
`tui`	Launch interactive Net Manager TUI
`set-script`	Attach a J-Link script to a debug net
`remove-script`	Remove a J-Link script from a debug net
`show-script`	Display the J-Link script attached to a debug net

Command Reference

List Nets (Default)

List all saved nets on a Lager Box. This is the default behavior when no subcommand is provided.

lager nets --box my-lager-box

Output Columns:

Column	Description
`Name`	User-friendly net identifier
`Net Type`	Role/type of net (supply, debug, adc, gpio, i2c, spi, etc.)
`Instrument`	Physical equipment (Rigol_DP811, Keithley_2281S, etc.)
`Channel`	Specific channel on the instrument
`Address`	VISA or USB address of the instrument
`Script`	Whether a J-Link script is attached (debug nets only)

The Script column only appears if any debug net has a J-Link script attached. Example Output:

Name        Net Type    Instrument        Channel  Address
================================================================================
supply1     supply      Rigol_DP811       1        TCPIP::192.168.1.100::INSTR
battery1    batt        Keithley_2281S    1        TCPIP::192.168.1.101::INSTR
debug1      debug       J-Link            STM32F4  USB::001::002
adc1        adc         LabJack_T7        AIN0     USB::470026574
gpio1       gpio        LabJack_T7        FIO0     USB::470026574
i2c1        i2c         LabJack_T7        0        USB::470026574
spi1        spi         Aardvark          0        USB::2238595116
uart1       uart        Prolific_USB      0        /dev/ttyUSB0

`create`

Create a new net by specifying its name, type, channel, and instrument address.

lager nets create NAME ROLE CHANNEL ADDRESS [OPTIONS]

Arguments:

NAME - Unique name for the net (e.g., supply1, debug_main)
ROLE - Type of net: supply, batt, solar, debug, adc, dac, gpio, scope, eload, uart, usb, camera, arm, watt-meter, thermocouple, i2c, spi
CHANNEL - Channel identifier (e.g., 1, AIN0, FIO0, STM32F4, 0)
ADDRESS - VISA address or device path (e.g., TCPIP::192.168.1.100::INSTR)

Options:

--box TEXT - Lagerbox name or IP
--jlink-script FILE - J-Link script file for debug nets (stored on box)

Examples:

# Create a power supply net
lager nets create supply1 supply 1 TCPIP::192.168.1.100::INSTR --box my-lager-box

# Create a debug net for STM32
lager nets create debug1 debug STM32F407VG USB::001::002 --box my-lager-box

# Create a debug net with J-Link script
lager nets create debug1 debug STM32F407VG USB::001::002 --jlink-script ./my_device.JLinkScript --box my-lager-box

# Create an ADC net on LabJack
lager nets create temp_sensor adc AIN0 USB::470026574 --box my-lager-box

# Create an I2C net on LabJack
lager nets create i2c_bus i2c 0 USB::470026574 --box my-lager-box

# Create an I2C net on Aardvark
lager nets create i2c_aardvark i2c 0 USB::2238595116 --box my-lager-box

# Create an SPI net on LabJack
lager nets create spi_bus spi 0 USB::470026574 --box my-lager-box

# Create an SPI net on Aardvark
lager nets create spi_aardvark spi 0 USB::2238595116 --box my-lager-box

# Create a UART net
lager nets create serial1 uart 0 /dev/ttyUSB0 --box my-lager-box

The --jlink-script option is only applicable for debug nets. If used with other net types, a warning is printed and the option is ignored.

Validation Rules:

Net names must be globally unique across all types
The (role, instrument, channel, address) tuple must match a connected instrument
Only one net per channel is allowed for most instruments
Debug probes (J-Link) allow only one net per instrument/address

`create-all`

Automatically create nets for all available channels on all connected instruments. This is useful for quickly setting up a new Lager Box.

lager nets create-all [OPTIONS]

Options:

--box TEXT - Lagerbox name or IP
--yes - Skip confirmation prompt

Example:

# Preview what nets would be created
lager nets create-all --box my-lager-box

# Create all nets without prompting
lager nets create-all --box my-lager-box --yes

Output:

Found 8 nets that can be created:
  - supply1 (supply) on Rigol_DP811 channel 1
  - adc1 (adc) on LabJack_T7 channel AIN0
  - adc2 (adc) on LabJack_T7 channel AIN1
  - gpio1 (gpio) on LabJack_T7 channel FIO0
  - i2c1 (i2c) on LabJack_T7 channel 0
  - spi1 (spi) on LabJack_T7 channel 0
  - debug1 (debug) on J-Link channel STM32F4

Create all 8 nets on box <BOX_IP>? [y/N]:

`create-batch`

Create multiple nets from a JSON file for efficient bulk setup.

lager nets create-batch JSON_FILE [OPTIONS]

Arguments:

JSON_FILE - Path to JSON file containing net definitions

Options:

--box TEXT - Lagerbox name or IP

JSON Format:

[
  {
    "name": "supply1",
    "role": "supply",
    "channel": "1",
    "address": "TCPIP::192.168.1.100::INSTR"
  },
  {
    "name": "i2c_bus",
    "role": "i2c",
    "channel": "0",
    "address": "USB::470026574"
  },
  {
    "name": "spi_bus",
    "role": "spi",
    "channel": "0",
    "address": "USB::2238595116"
  }
]

Example:

lager nets create-batch nets.json --box my-lager-box

`delete`

Delete a specific net by its name and type.

lager nets delete NAME NET_TYPE [OPTIONS]

Arguments:

NAME - Name of the net to delete
NET_TYPE - Type of the net (supply, debug, adc, i2c, spi, etc.)

Options:

--box TEXT - Lagerbox name or IP
--yes - Skip confirmation prompt

Example:

# Delete a supply net (with confirmation)
lager nets delete supply1 supply --box my-lager-box

# Delete without confirmation
lager nets delete temp_sensor adc --box my-lager-box --yes

# Delete an I2C net
lager nets delete i2c_bus i2c --box my-lager-box --yes

`delete-all`

Delete all saved nets on a Lager Box. This is a dangerous operation.

lager nets delete-all [OPTIONS]

Options:

--box TEXT - Lagerbox name or IP
--yes - Skip confirmation prompt

Example:

# Delete all nets (requires confirmation)
lager nets delete-all --box my-lager-box

# Delete all nets without prompting
lager nets delete-all --box my-lager-box --yes

`rename`

Rename an existing net.

lager nets rename NAME NEW_NAME [OPTIONS]

Arguments:

NAME - Current name of the net
NEW_NAME - New name for the net (must be unique)

Options:

--box TEXT - Lagerbox name or IP

Example:

lager nets rename supply1 main_power --box my-lager-box

`tui`

Launch an interactive terminal-based UI for managing nets. The TUI provides a visual interface for viewing, creating, and deleting nets.

lager nets tui [OPTIONS]

Options:

--box TEXT - Lagerbox name or IP

Example:

lager nets tui --box my-lager-box

TUI Features:

Browse all connected instruments and their channels
Create new nets with guided prompts
Delete existing nets
View net details and instrument information
Keyboard navigation

`set-script`

Attach a JLinkScript file to an existing debug net. The script is stored on the box and used automatically during connect, flash, erase, and reset operations.

lager nets set-script NAME SCRIPT_PATH [OPTIONS]

Arguments:

NAME - Name of the debug net
SCRIPT_PATH - Path to the J-Link script file (must exist locally)

Options:

--box TEXT - Lagerbox name or IP

Example:

# Attach a J-Link script to a debug net
lager nets set-script debug1 ./custom_connect.JLinkScript --box my-lager-box

# Update an existing script
lager nets set-script debug1 ./updated_script.JLinkScript --box my-lager-box

`remove-script`

Remove a JLinkScript file from an existing debug net.

lager nets remove-script NAME [OPTIONS]

Arguments:

NAME - Name of the debug net

Options:

--box TEXT - Lagerbox name or IP

Example:

lager nets remove-script debug1 --box my-lager-box

`show-script`

Display the contents of a JLinkScript attached to a debug net. Output goes to stdout so it can be piped or redirected.

lager nets show-script NAME [OPTIONS]

Arguments:

NAME - Name of the debug net

Options:

--box TEXT - Lagerbox name or IP

Example:

# Display script contents
lager nets show-script debug1 --box my-lager-box

# Save script to a local file
lager nets show-script debug1 --box my-lager-box > script.JLinkScript

Net Types Reference

Net Type	Description	Typical Instruments
`supply`	Power supply output	Rigol DP800, Keithley 2200/2280, Keysight E36200
`batt`	Battery simulator	Keithley 2281S
`solar`	Solar simulator	EA PSI/EL series
`eload`	Electronic load	Rigol DL3021
`debug`	Debug probe	J-Link, CMSIS-DAP, ST-Link
`adc`	Analog input	LabJack T7
`dac`	Analog output	LabJack T7
`gpio`	Digital I/O	LabJack T7, MCC USB-202
`i2c`	I2C bus	LabJack T7, Aardvark
`spi`	SPI bus	LabJack T7, Aardvark
`scope`	Oscilloscope	Rigol MSO5000, PicoScope
`uart`	Serial port	Prolific USB, SiLabs CP210x
`usb`	USB port control	Acroname hub, YKUSH
`camera`	Video capture	Logitech BRIO
`arm`	Robot arm	Rotrics Dexarm
`watt-meter`	Power measurement	Yocto Watt
`thermocouple`	Temperature sensor	Phidget thermocouples

JLinkScript Workflow

JLinkScript files allow customization of J-Link debug probe behavior for specific hardware configurations. Scripts can handle custom reset sequences, clock initialization, and other device-specific operations.

# Create a debug net with a J-Link script
lager nets create debug1 debug STM32F407VG USB::001::002 \
  --jlink-script ./my_device.JLinkScript --box my-lager-box

# Or attach a script to an existing debug net
lager nets set-script debug1 ./my_device.JLinkScript --box my-lager-box

# Verify the script is attached
lager nets show-script debug1 --box my-lager-box

# The script is used automatically for all debug operations:
lager debug debug1 flash --hex firmware.hex --box my-lager-box
lager debug debug1 gdbserver --box my-lager-box

# Remove the script when no longer needed
lager nets remove-script debug1 --box my-lager-box

You can also configure J-Link scripts per-project in the local .lager config file:

{
  "DEBUG": {
    "debug1": "./scripts/my_device.JLinkScript"
  }
}

When both a net-level script (via set-script) and a project-level script (via .lager config) exist, the project-level script takes priority.

Examples

# List all nets
lager nets --box my-lager-box

# Create a new power supply net
lager nets create vdd_main supply 1 TCPIP::192.168.1.100::INSTR --box my-lager-box

# Create I2C and SPI bus nets
lager nets create i2c_sensors i2c 0 USB::470026574 --box my-lager-box
lager nets create spi_flash spi 0 USB::2238595116 --box my-lager-box

# Auto-create all available nets
lager nets create-all --box my-lager-box --yes

# Delete a specific net
lager nets delete old_supply supply --box my-lager-box --yes

# Rename a net
lager nets rename supply1 main_power --box my-lager-box

# Launch interactive manager
lager nets tui --box my-lager-box

# Bulk create from JSON file
lager nets create-batch testbed-nets.json --box my-lager-box

# Manage J-Link scripts
lager nets set-script debug1 ./custom_init.JLinkScript --box my-lager-box
lager nets show-script debug1 --box my-lager-box
lager nets remove-script debug1 --box my-lager-box

Notes

Net names are globally unique regardless of type
Use lager instruments --box <lager-box> to see available instruments and channels
The TUI provides the easiest way to set up nets for the first time
Use create-all to quickly configure a new Lager Box with sensible defaults
I2C and SPI nets are supported on LabJack T7 and Aardvark adapters
J-Link scripts are base64-encoded for storage and decoded automatically during debug operations

Lager Box Management

Configuration

Power & Simulation

Measurement

I/O & Communication

Development

Utilities

Syntax

Global Options

Commands

Command Reference

List Nets (Default)

`create`

`create-all`

`create-batch`

`delete`

`delete-all`

`rename`

`tui`

`set-script`

`remove-script`

`show-script`

Net Types Reference

JLinkScript Workflow

Examples

Notes

Lager Box Management

Configuration

Power & Simulation

Measurement

I/O & Communication

Development

Utilities

​Syntax

​Global Options

​Commands

​Command Reference

​List Nets (Default)

​create

​create-all

​create-batch

​delete

​delete-all

​rename

​tui

​set-script

​remove-script

​show-script

​Net Types Reference

​JLinkScript Workflow

​Examples

​Notes

Syntax

Global Options

Commands

Command Reference

List Nets (Default)

`create`

`create-all`

`create-batch`

`delete`

`delete-all`

`rename`

`tui`

`set-script`

`remove-script`

`show-script`

Net Types Reference

JLinkScript Workflow

Examples

Notes