Haltech supports OBD2 signaling and have a cable with the OBD2 connector on one end that plugs into the ECU. From that point on, just use any OBD2 dongle (Bluetooth, WiFi) and an app that can talk to it (my preference is Torque; a dozen or so years ago I wrote a plugin for it - shift lights). I think there are others now as well. Then simply select a gauges/sensors layout that you want. This is for display purposes only (like tire pressure, temperatures, etc.), not for tuning. I dare not touch the tuning parts. Seb will disown me, I'm afraid :) Plus I don't have money anymore to fix things ;)
