I also seem to be having trouble with the device I'm using [Nexus 7 - 32GB Android 4.2.1 - rooted] with my Synology Diskstation DS-209+. I've followed all the directions from this link https://github.com/seblucas/cops/wiki/Howto---Synology
including using the same DIRs noted and copy/pasted the changed lines in the config_local.php file. I've tried 2 readers, namely Moon Reader+ as well as FBReader, and even using an FBReader plugin called "FBReaderJ-plugin-local-opds-scanner
" to scan my local network as well as writing in the path manually to 192.168.45/Calibre/. Both apps are unable to locate the OPDS catalog, but in a web browser on my Nexus or my PC, the catalog appears normally. Why shouldn't either reader be unble to find the catalog? Thanks for your help!