Hi @asheshad & @team18049,
I had the same issue with firmware v1.8.2, have to compile v1.9.0 (from master) and now I can see MAV_* parameters as expected. Note that I’m using Pixhawk 1 (HW 2.4.8), so my chipset STM32F427 is Rev3, and I built and flashed px4fmu-v3_default firmware
see my post: