EUDAQ2 -- A Flexible Data Acquisition Software Framework for Common Test Beams

The data acquisition software framework, EUDAQ, was originally developed to read out data from the EUDET-type pixel telescopes. This was successfully used in many test beam campaigns in which an external position and time reference were required. The software has recently undergone a significant upgrade, EUDAQ2, which is a generic, modern and modular system for use by many different detectortypes, ranging from tracking detectorsto calorimeters. EUDAQ2 is suited as an overarching software that links individual detectorreadout systems and simplifies the integration of multiple detectors. The framework itself supports several triggering and event building modes. This flexibility makes test beams with multiple detectorssignificantly easier and more efficient, as EUDAQ2 can adapt to the characteristics of each detectorprototype during testing. The system has been thoroughly tested during multiple test beams involving different detectorprototypes. EUDAQ2 has now been released and is freely available under an open-source license.