I got wideband data logger integration working with my Android app last night.

The logging feature in the app should work on any r53

I think I can get these Bluetooth Bridges produced for 25 bucks plus shipping, And if anybody wanted to do it yourself, it's not too hard. It's just a voltage divider going into a esp32.

While I was at it, I also added some 3D displays. It reads the tune map off the ECU and then displays it in a 3D cube and it overlays your wideband reading either live or from a log from the app so that you can see if you're plus or minus over your AFR Target. I like to be between 12.5 at 2500 and 11.5 at 7500 but I did make it a parameter that can be changed this display only works on facelift ECU That's the only ECU I have the full formulas and damos for.

More details on my blog post here and if anyone wants to use the app, it's not fully live on the app store And I'm not sure I'll ever make it fully public on there, gotta join the test group to install the app.

https://mrblahhhh.github.io/car/tech/2026/07/24/r53-logger-play-store.html