External baro BMP280 stopped working after upgrading from AP4.4.4 to 4.5.3

ArduPlane Plane 4.5
1

I recently upgraded my plane with FC Omnibus F4 from Arduplane 4.4.4 to 4.5.2.
In this plane I have beside the integrated onboard baro also external I2C baro BMP280.
With previous versions including the 4.4.4 it worked perfectly, but after upgrading to 4.5.2 (also tested 4.5.3) it’s not detected anymore.
My settings: BARO_EXT_BUS = -1 and BARO_PROBE_EXT = 2.
For the test I reverted 4.4.4 without touching the configuration and ext. baro started working again.
Has anything changed in the settings, or it’s a version bug?
Thanks!
Roman

2

I’ll venture a guess that many offboard sensors were disabled in that old board’s definitions to make room for basic autopilot function. Not a bug, but intentional omission. A look through the source would confirm my educated guess.

3

Well, I thought that baro is quite basic sensor…
I’m unfortunately unable to check the sources, could anyone confirm this?

4

To clarify:

My WORKING internal baro is BMP280 on a SPI bus.
My NOT WORKING external baro is BMP280 on a I2C bus - not detected by 4.5.3, on 4.4.4 detected.
Hardware driver is the same, where is the problem then?