MSR is a Java library for the serial communication protocol of the universal data logger for long-term measurements MSR145. The data logger can be equipped with various sensors such as temperature, pressure, humidity, or acceleration sensors. This library provides an interface for the MSR145 to use the logger as an active sensor. For comunication, the RxTx interface is used.

The bundle adjustment is written in the platform-independent programming language Java and, therefore, the software is runnable at each platform and operation system that provides a Java Runtime Environment (JRE). The JRE can be found for several platforms at Oracles download page or at the OpenJDK-project pages.