This document describes the use of DLMS/COSEM for Low-Power Wide Area Networks (LPWAN). It specifies how the COSEM data model and the DLMS/COSEM application layer can be used over various LPWAN technologies using an adaptation layer based on IETF RFC 8724 SCHC: Generic Framework for Static Context Header Compression and Fragmentation , and in particular over LoRaWAN. This profile is intended to be used with LPWANs as defined in IETF RFC 8376, in particular LoRaWAN. Low-Power Wide Area Networks (LPWANs) are wireless technologies with characteristics such as large coverage areas, low bandwidth, possibly very small packet and application-layer data sizes, and long battery life operation. This document does not provide functionality to manage the lower layers of the LPWANs. This part of the DLMS/COSEM suite specifies the communication profile for Low-Power Wide Area Networks (LPWAN). It specifies how the COSEM data model and the DLMS/COSEM application layer can be used over various LPWAN technologies using the IETF RFC 8724 SCHC: Generic Framework for Static Context Header Compression and Fragmentation , and in particular over LoRaWAN. The DLMS/COSEM LPWAN communication profiles use connection-less transport layer based on the Internet Standard User Datagram Protocol (UDP) and Internet Protocol (IPv6). The adaptation layer is based on IETF RFC 8724, SCHC: Generic Framework for Static Context Header Compression and Fragmentation which provides both a header compression/decompression mechanism and an optional fragmentation/reassembly mechanism. SCHC compression is based on static context with small context identifier to represent full IPv6 / UDP / COSEM wrapper headers. If required, SCHC fragmentation is used to support IPv6 MTU over the LPWAN technologies.