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Lager is a hardware testing platform that lets you remotely control lab equipment and debug embedded devices from your laptop. Think of it as your lab bench, accessible from anywhere via simple command-line commands. The tool significantly increases efficiency by replacing manual probing and handwritten test procedures with scriptable, reproducible workflows that integrate directly into your development cycle.

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How Lager Works

Lager creates a remote lab with three components: 
Your Laptop  →  Lager Box  →  Lab Equipment + Device Under Test

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1. Lager Box

The Lager Box is a compact, mini-computer that sits in your lab, physically connected to your test equipment and Device Under Test (DUT). Once connected to your lab instruments and your DUT, your Lager Box replaces your need to physically be in your lab by creating a virtual interface that you can interact with from anywhere as long as you have network access.

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2. Lager CLI & Python Library

To interact with a Lager Box, you’ll need the Lager CLI - a command-line tool you install on your personal computer. It allows you to create a personalized environment to more effectively interact with your instruments and DUT as if they were physically with you. You can use the CLI interactively from the terminal or automate entire test suites with the Lager Python library. Common workflows:
  • Flash and debug embedded devices
  • Control power supplies, battery simulators, and electronic loads
  • Monitor serial/UART output with interactive test runners
  • Capture oscilloscope waveforms and logic analyzer traces
  • Communicate with devices over I2C and SPI buses
  • Automate full regression test suites
The CLI also includes Lager Terminal, an interactive REPL with tab completion and command history. Run lager terminal or just lager with no arguments to launch it.

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3. Lab Equipment & Devices

The Lager Box supports a wide range of professional test equipment that you connect with:
  • Power supplies, battery simulators, and electronic loads
  • Debug probes (J-Link, CMSIS-DAP, ST-Link)
  • Oscilloscopes and logic analyzers
  • ADC/DAC/GPIO modules (LabJack T7, MCC USB-202)
  • I2C/SPI adapters (Total Phase Aardvark, LabJack T7)
  • Power meters (Yocto-Watt, Joulescope JS220)
  • And more (see full list below)

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Lager Nets

In order to interact with your test environment using a Lager Box, the Lager Box must be configured with an assortment of Nets. Each Net corresponds to a specific instrument, channel of an instrument, serial port, or other interface that you may want to interact with using your Lager Box. For example, you might have your DUT powered by channel 1 of a power supply. You’d then be able to create a Power Supply Net called DUT_POWER which maps to that power supply’s first channel and allows you to toggle on/off your DUT or perform any other function that power supply supports.