Here's a rundown of the major changes since FREEDM 1.2.

General

• We now use Python instead of C++ for code generation, allowing the DGI to be cross-compiled onto a TS-7800. This will save tons of time. See Cross Compile Guide for TS-7800
• Timings are now specified in a configuration file instead of hardcoded; see FREEDM 1.3 Configuration. Sample configurations are provided for groups with the Arch machines at S&T, the Mamba machines at FSU, and the TS-7800.
• A utility is provided to assist with generating timings for your machine; see Configuring Timings if you have issues with the default timings.
• hostname:port strings are now used directly by the DGI to identify peers, instead of inscrutable 32-byte UUIDs.
• Internal message passing is now 5/2 times faster!
• Don't segfault if we can't connect to a peer.

Device Management

• Devices are now specified in a adapter.xml instead of in freedm.cfg; see Writing the adapter specification. (adapter.xml also replaces fpga.xml)
• The PSCAD Interface can now be used to test CRtdsAdapter; see Configuring the simulation server.
• A new device class provides easy access to the group state with the RTDS simulation; see Reading Group State From CDeviceLogger.
• Ignore commands of value 0.0 at the simulation server; this is a temporary workaround to avoid a serious race condition in the CRtdsAdapter protocol.
• Also, most of the device code has been rewritten. You probably won't notice.

Group Management

• General stability and responsiveness improvements, particularly with larger groups.

State Collection

• Fix two bugs that could cause State Collection to not work.
• Fix a bug that could cause incorrect normal values.

Load Balancing

• Don't run past its phase, stealing time from Group Management.
• The load table is now nicer.
• There are lots of known bugs with Load Balancing. This module will be a target for future development.