Are Storm32 gimbals not supported by 3.6?

I have tried every combination of parameters. It will stabilize, but gimbal tilt is not responding to Ch6 knob on my QX7. It was working fine before I switched to QGround Control. Currently here’s where we are:
QGroundControl v3.5.2
Pixhawk Ardupilot 3.6.9
Storm32 board v1.30 F103RC, v0.90
Storm32 UART is connected to Serial 4/5
“SERIAL4_BAUD”=115200
“SERIAL4_PROTOCOL”=8
“MNT_TYPE”=5
“MNT_RC_IN_TILT”=6
“Emit heartbeat” in the gimbal setup.

MavLink is “Emit Heartbeat.” STorM32 serial is “No Heartbeat” :

Set-up through the Mission Planner (STorM32 serial protocol)

The custom STorM32 protocol was added as an alternative to the MAVLink protocol and has the same features. To use the serial protocol use all the same settings as above except:

  • Set SERIALX_PROTOCOL to “8” (where “X” is “1”, “2” or “4” depending upon which Pixhawk serial port the gimbal is connected to)
  • Set MNT_TYPE to “5”
  • When Configuring the Gimbal controller set the “MAVLink configuration” parameter to “no heartbeat”

FWIW, I’m using MavLink serial and it works just fine.

Are you attempting to connect using Mavlink or Serial?

From the Storm32 docs: ArduPilot offers two mounts, which can be used with the STorM32 controller, the STorM32 Mavlink (MNT_TYPE = 4) and STorM32 Serial (MNT_TYPE = 5) mount types. For further details please visit ArduPilot Docs > Copter > Optional Hardware > Camera&Gimbals > SToRM32 Gimbal Controller.