Installed a Stratux a few months ago. Was working well with Avare. Recently my Avare lost GPS signal from Stratux. WIFI on tablet shows connected to Stratux WIFI with strong signal, but no position or data. I thought it just needed a GPS antenna upgrade. So, I replaced the internal GPS antenna with a wired, external GPS antenna. That made no change. Avare works fine when connected to bluetooth GPS receiver. What is likely wrong with the Stratux?