Issue link: https://read.uberflip.com/i/1428350
LoRaWAN Remote Multicast Setup v1.0.0 Specification ©2018 LoRa Alliance™ Page 8 of 18 The authors reserve the right to change specifications without notice. 4.1 PackageVersionReq & Ans 187 188 The PackageVersionReq command has no payload. 189 The end-device answers with a PackageVersionAns command with the following payload. 190 191 Field PackageIdentifier PackageVersion Size (bytes) 1 1 Table 2: PackageVersionAns 192 PackageIdentifier uniquely identifies the package. For the "multicast control package" this 193 identifier is 2. 194 PackageVersion corresponds to the version of the package specification implemented by the 195 end-device. 196 4.2 McGroupStatusReq & Ans 197 198 The McGroupStatusReq command has a single byte payload. 199 200 Field CmdMask Size (bytes) 1 Table 3: McGroupStatusReq 201 202 Where: 203 CmdMask Fields RFU ReqGroupMask Size (bits) 4bits 4bits Table 4: McGroupStatusReq CmdMask field 204 The ReqGroupMask bit mask defines the multicast groups whose status should be reported 205 by the end-device. ReqGroupMask[n] = 1 means that the n th multicast group status 206 SHOULD be included in the answer. ReqGroupMask[n] = 0 means that this group SHALL 207 NOT be included in the answer. 208 209 The end-device responds to the McGroupStatusReq command with a McGroupStatusAns 210 with the following payload: 211 212 213 Field status Optional list of [McGroupID+McAddr] Size (bytes) 1 5xNbItems Table 5: McGroupStatusAns 214 215 The status field encodes the following information: 216 217 Status Fields RFU NbTotalGroups AnsGroupMask Size (bits) 1bit 3bits 4bits Table 6: McGroupStatusAns Status field 218 AnsGroupMask is a bit mask describing which groups are listed in the report. If the end- 219 device cannot report the status of the multicast groups specified by the ReqGroupMask field 220 of the request, the end-device SHALL discard the n th last groups (starting with the highest 221 GroupID) until the answer fits. In that case, the AnsGroupMask mask is different from the 222