Edit: Please disregard the I2C related issues. Due to the lacking documentation on PH2.1 (not AP) I assumed that I could tie onto a different I2C bus, and since the Oled was working, I thought it was correct.
Thanks to a post I stumbled upon from Oxinarf - explaining that only the GPS1 I2C is being used by AP for now, I've fixed it.
I've now hacked into the GPS1 I2C wires and connected to my splitter, which has sorted out my issues.
Flow and Rangfinder are working on I2C.
I'll leave this up for now. If you think it has no use feel free to kill it.
Just loaded RC4 on this Pixhawk 2.1 (that I think I've finally sorted out - that's a whole other ordeal)
Pixhawk 2.1 Cube with Edison
Oled 1.3" (only works on GPS 4 I2C along with the other I2C devices)
PX4Flow - I'll have to look through the log to see if its working..MP shows it enabled but I'm not sure.
Lightware SF11/C - doesn't appear to be working on I2C with 3.5 RCx (2 & 3 & 4 for sure) shows a flat line in the dataflash - sonarrange shows 0 - yet no error messages. I can connect to it through the Pixhawk using lightware's software, it see's and shows config, can config and save params. I have this powered separately from the FC, so I'm going to see if that's the issue although it's never been an issue before.
Here GPS is found and configured fine
Everything seemed to load up fine.
Can't Enable EKF3 on this PH2.1 - it slogs everything down and keeps edison, telemtry from working, and generally just makes everything slow and unstable feeling. Can't connect and power via USB with this enabled. (At least on mine)
I calibrated accel and compasses worked fine.
Pixhawk (2 anyway) no longer makes the 2 tone sound when lose connection to radio (RC2, 3 & 4)
Alt-Hold and Pos Hold seemed to work fine.
I'll test more when its not so windy. This was my first flight where I felt like the PH2.1 was actually working well.
Wind whipped up all the sudden right as I took off, and I had to hastily land - tipping the copter. But Crash check worked.
Figured I'd post just to get it out there.