Lager CLI

A powerful command-line interface for controlling embedded hardware, test equipment, and development boards through Lager Data gateway devices.

Features

Hardware Control

• Power Management: Control power supplies, battery simulators, solar simulators, and electronic loads
• I/O Operations: ADC/DAC, GPIO, thermocouple sensors
• Test Instruments: Oscilloscopes, logic analyzers, multimeters, signal generators

Embedded Development

• Debugging: ARM Cortex-M debugging with J-Link, CMSIS-DAP, ST-Link support
• Firmware Flashing: Flash firmware via debug probes
• Serial Communication: UART terminal with test framework integration
• Robotics: Robot arm control for automated testing

Wireless & Connectivity

• Bluetooth LE: Scan, connect, and interact with BLE devices
• USB: Programmable USB hub control
• Webcam: Video streaming from gateway devices

Installation

Install the Lager CLI using pip:

pip install lager-cli

Or upgrade to the latest version:

pip install -U lager-cli

Quick Start

1. Configure your gateway:

   lager defaults set gateway <your-gateway-id>
   

2. Test connectivity:

   lager hello
   

3. List available instruments:

   lager instruments
   

4. Control a power supply:

   lager supply <net> voltage 3.3 --dut <gateway-id>
   

Core Commands

Power Supply Control

# Set voltage and enable output
lager supply <net> voltage 3.3 --yes

# Set current limit
lager supply <net> current 0.5

# Check power state
lager supply <net> state

ADC/DAC Operations

# Read ADC voltage
lager adc <net>

# Set DAC output
lager dac <net> 1.8

Embedded Debugging

# Connect to debug probe
lager debug <net> connect --dut <dut>

# Flash firmware (auto-connects if needed)
lager debug <net> flash --hex firmware.hex --dut <dut>

# Reset and halt target
lager debug <net> reset --halt --dut <dut>

# Stream RTT logs
lager debug <net> rtt --dut <dut>

# Read memory
lager debug <net> memrd 0x08000000 256 --dut <dut>

Oscilloscope & Logic Analyzer

# Measure frequency on scope channel
lager scope <net> measure freq

# Configure edge trigger
lager logic <net> trigger edge --slope rising --level 1.8

Battery & Solar Simulation

# Set battery state of charge
lager battery <net> soc 80

# Configure solar irradiance
lager solar <net> irradiance 1000

Serial Communication

# Connect to UART
lager uart --baudrate 115200

# Interactive mode with test runner
lager uart -i --test-runner unity

Bluetooth LE

# Scan for BLE devices
lager ble scan --timeout 5.0

# Connect to device
lager ble connect <address>

Configuration

Gateway Setup

The CLI can connect to gateways via:

• Cloud API: Using gateway IDs
• Direct IP: Using Tailscale or VPN IP addresses

Create a .lager file in your project directory:

{
  "duts": {
    "my-gateway": "gateway-abc123",
    "local-gateway": "100.91.127.26"
  }
}

Direct IP Access

For direct IP connections, ensure SSH key authentication is configured:

# Configure SSH key for a gateway
ssh-copy-id lagerdata@<gateway-ip>

# Then connect via the CLI
lager ssh --dut <gateway-ip>

Environment Variables

• LAGER_GATEWAY: Default gateway ID or IP address
• LAGER_DEBUG: Enable debug output
• LAGER_COMMAND_DATA: Command data (used internally)

Net Management

Lager uses "nets" to represent physical test points or signals on your PCB:

# List all configured nets
lager nets

# Create a new power supply net
lager nets create VDD_3V3 supply 1 USB0::0x1AB1::0x0E11::DP8C0000001

# Auto-discover and create all nets
lager nets create-all

# Interactive TUI for net management
lager nets tui

Advanced Features

Remote Python Execution

# Run a Python script on the gateway
lager python my_script.py --dut <gateway-id>

# Run with port forwarding
lager python --port 5000:5000/tcp server.py

Development Environment

# Create a development environment
lager devenv create --image python:3.10

# Open interactive terminal
lager devenv terminal

Package Management

# Install packages on gateway
lager pip install numpy

Supported Hardware

Debug Probes

• SEGGER J-Link
• ARM CMSIS-DAP
• ST-Link v2/v3
• Xilinx XDS110

Power Supplies

• Rigol DP800 series
• Keysight E36200/E36300 series
• Keithley 2200/2280 series

Battery Simulators

• Keithley 2281S

Solar Simulators

• EA PSI/EL series (two-quadrant)

Oscilloscopes

• Rigol MSO5000 series

I/O Hardware

• LabJack T7 (ADC/DAC/GPIO)

USB Hubs

• Acroname USBHub3+
• YKUSH

Robotics

• Rotrics Dexarm

Temperature

• Phidget Thermocouples

Target Microcontrollers

Supports debugging and flashing for:

• STM32 (F0/F1/F2/F3/F4/F7/G0/G4/H7/L0/L1/L4/WB/WL series)
• Nordic nRF52/nRF91
• Atmel/Microchip SAM D/E/4S/70
• Texas Instruments CC32xx
• NXP i.MX RT, LPC54xx/55xx
• Silicon Labs EFM32
• Microchip PIC32MM

Authentication & Access

The CLI authenticates to gateways via VPN access (Tailscale or similar). Access control is managed by your VPN permissions - if you have VPN access to a gateway, you can control it with the CLI.

Prerequisites

1. VPN Access: Connect to your organization's VPN (Tailscale, etc.)
2. SSH Keys: Configure SSH key authentication for direct gateway access:

   ssh-copy-id lagerdata@<gateway-ip>
   

3. SSH to Gateway: Use the CLI to connect:

   lager ssh --dut <gateway-ip-or-name>
   

Verify Connectivity

# Test gateway connectivity
lager hello --dut <gateway-id-or-ip>

# Check DUT status
lager status

Documentation

For detailed documentation, visit: https://docs.lagerdata.com

Command Help

Every command has built-in help:

lager --help                 # Show all commands
lager supply --help          # Show supply command options
lager debug --help           # Show debug command options

Examples

Automated Test Script

#!/bin/bash

DUT="my-gateway"

# Configure power supply
lager supply VDD voltage 3.3 --dut $DUT --yes

# Flash firmware
lager debug DEBUG_SWD flash --hex build/firmware.hex --dut $DUT

# Reset and start
lager debug DEBUG_SWD reset --dut $DUT

# Monitor UART output
lager uart --baudrate 115200 --test-runner unity --dut $DUT

# Read sensor values
voltage=$(lager adc SENSOR_OUT --dut $DUT)
temp=$(lager thermocouple TEMP1 --dut $DUT)

echo "Voltage: $voltage V"
echo "Temperature: $temp °C"

# Disable power
lager supply VDD disable --dut $DUT

Interactive Python Control

# example_test.py - Run on gateway with: lager python example_test.py

from lager.supply import supply
from lager.adc import adc
import time

# Set power supply voltage
supply.set_voltage("VDD_3V3", 3.3)
supply.enable("VDD_3V3")

# Wait for stabilization
time.sleep(0.1)

# Measure voltage
voltage = adc.read("VOUT")
print(f"Output voltage: {voltage:.3f} V")

# Disable supply
supply.disable("VDD_3V3")

Troubleshooting

Connection Issues

# Test gateway connectivity
lager hello --dut <gateway-id>

# Check gateway status
lager status --dut <gateway-id>

Permission Errors

For Tailscale/direct IP connections, ensure SSH keys are configured:

# Set up SSH keys
ssh-copy-id lagerdata@<gateway-ip>

# Test SSH access
lager ssh --dut <gateway-ip-or-name>

Debug Probe Not Found

Verify J-Link GDB Server is installed on the gateway:

# Download J-Link to /tmp/ on your local machine
# Visit: https://www.segger.com/downloads/jlink/
# Download: JLink_Linux_V794a_x86_64.tgz to /tmp/

# Deploy gateway (J-Link will be installed automatically)
cd deployment
./setup_and_deploy_gateway.sh <gateway-ip>

Authentication Issues

If you encounter connection issues:

1. Verify VPN connection: Ensure you're connected to the correct VPN
2. Check SSH keys: Verify SSH key authentication is configured

   ssh-copy-id lagerdata@<gateway-ip>
   

3. Test SSH access: Try connecting to the gateway

   lager ssh --dut <gateway-ip-or-name>
   

4. Test connectivity: Use lager hello to verify the gateway is reachable

   lager hello --dut <gateway-ip-or-name>
   

Contributing

We welcome contributions! Please see our contribution guidelines for more information.

Support

• Documentation: https://docs.lagerdata.com
• Issues: Report bugs and request features via your support channel
• Email: hello@lagerdata.com

License

MIT License - Copyright (c) Lager Data LLC

Testing

Comprehensive test suites are available in the test/ directory:

# Hardware-dependent tests (require instruments)
cd test
./supply.sh <DUT> <SUPPLY_NET>
./battery.sh <DUT> <BATTERY_NET>
./debug.sh <DUT> <DEBUG_NET> <HEXFILE> <ELFFILE>
./labjack.sh <DUT> <GPIO_NET> <ADC_NET> <DAC_NET>

# Gateway-only tests (no instruments required)
./deployment.sh <gateway-ip>

See test/README.md for test format and how to write new tests.

Changelog

Recent Updates

• Renamed test scripts for clarity (test_*_commands.sh → *.sh)
• Unified gateway deployment script (setup_and_deploy_gateway.sh)
• Added comprehensive test documentation (test/README.md)
• Enhanced debug command with RTT streaming and memory operations
• Improved error handling and validation across all commands

See full changelog in the releases.