Device types (phone, OBD reader) and software versions (Android, OBD dongle and TuneECU)
Steps you've done so far (you selected the dongle in TuneECU after pairing the phone to it, did you register TuneECU, does the app connect to the bike correctly and let you read settings)
It may, but the questions remain. Is TuneECU the latest version, as it supports newer bikes with version updates. Did you register the Rocket into the app (it only supports 5 bikes in the standard version)? Either way, with it working on one bike but not another, you may be better reaching out to Alain or Tom on the TuneECU FB forum, or the TuneECU support forum. TuneECU Support Boards
friends, i was using the version of tuneecu downloaded from google play and it doesn't work on rocket 3r, the apk downloaded directly from tuneecu worked perfectly! forgive me because i didn't know that possible to download directly from tuneecu. now i'm happy \o/ .