The version 2 is under development at the moment. It's a complete rewrite and reorganisation of the core from DAPNET-Core 1. The main changes are going for docker-based microservices, using CouchDB as distributed database and RabbitMQ for the transmitter connections.
The github repository for version 2 is https://github.com/dapnet-core. Have a look on the repositories. The documentation about the new concept is here.