Hi Martin,
for 7.0 you need at least Unity 5.4. Other to that you should be fine using our SDK.
Please be aware that version 7.1 (https://cdn.wikitude.com/sdk/7_1_0/WikitudeSDK_Epson_7-1-0_2017-09-20_19-49-25.zip) is the last version which supports BT-200. 7.2 and upcoming version support BT-300 and BT-350.
Regards,
Peter
Martin Flores