Control and visualization framework for automated liquid handling applications
lh_devices is a set of libraries for interacting with physical devices or components commonly used in liquid handling applications, such as valve positioners, syringe pumps and flow cells. The core organizational concept is that assemblies of physical devices are connected via fluid paths into a network, where each node of the network corresponds to a fluid port on a physical device.
Methods involving multiple devices or assemblies can be used to operate on the devices. These automatically generate logs using the logging module, return any results from the method (e.g. a measurement), and can save the results to a SQLite3 database.
Both devices and assemblies have a built in recursive web application builder for visualization and rudimentary control, with updates performed over a SocketIO connection.
Base (application-independent) classes are contained in the modules in the base lh_devices directory. Subdirectories contain application-specific code:
gilson: communications with Gilson devices, specifically through the GSIOC protocolhamilton: communications specifically with Hamilton OEM syringe pumps and valvesinjection: the ROADMAP project multichannel injection system. Requires an active setup to run.qcmd: the ROADMAP project QCMD measurement interface.
Two full applications are currently included in the repo. The injection system multichannel device controls a series of Hamilton-brand OEM syringe pumps and valves. Note that this will only work with an active setup.
python -m lh_devices.injection.app
The QCMD application interfaces with a QCMD instrument HTTP API and is purely for measurement. It will run without an active setup but will not be able to communicate:
python -m lh_devices.qcmd.app