This extended abstract reports about the implementation of the fragmentation and reassembly mechanisms of the SCHC framework for Low Power Wide Area Networks (LPWANs). The project aims to program the methods and routines described in the SCHC standard protocol for the fragmentation and reassembly mechanism while being independent of the LPWAN technology and remaining as an open-source project. The implementation addresses the ACK-on-Error mode, where an acknowledgement message is sent back to the sender device only when lost fragments are detected. Initial tests have been successful using a local communication setting with network sockets. We are currently porting the code to support the Sigfox LPWAN using Google Cloud Platform as a cloud computing service and the Python framework Flask for easy testing.