Render Betaflight VTX temperature element

[etiaro]

Betaflight does not allow to enter a custom vtx elements like INAV does, but it has VTX temperature widget that can be filled with reading on the VTX msposd. Tested on OpenIPC Thinker (Sigmastar).

[tipoman9]

I don't get the benefit of this PR. Can you explain or show a snapshot of the end result? VTx temp can easily be shown over the OSD if you have !TMW! text somewhere on the OSD, just set PilotName or CraftName to it and you will have a nice widget over the position of the !TMW! text. https://github.com/OpenIPC/msposd#custom-osd-elements

[henkwiedig]

He is refering to the betaflight msp_dp_sys command: https://betaflight.com/docs/development/API/DisplayPort#msp_dp_sys

// System elements rendered by VTX or Goggles
typedef enum {
    DISPLAYPORT_SYS_GOGGLE_VOLTAGE = 0,
    DISPLAYPORT_SYS_VTX_VOLTAGE = 1,
    DISPLAYPORT_SYS_BITRATE = 2,
    DISPLAYPORT_SYS_DELAY = 3,
    DISPLAYPORT_SYS_DISTANCE = 4,
    DISPLAYPORT_SYS_LQ = 5,
    DISPLAYPORT_SYS_GOGGLE_DVR = 6,
    DISPLAYPORT_SYS_VTX_DVR = 7,
    DISPLAYPORT_SYS_WARNINGS = 8,
    DISPLAYPORT_SYS_VTX_TEMP = 9,
    DISPLAYPORT_SYS_FAN_SPEED = 10,
    DISPLAYPORT_SYS_COUNT,
} displayPortSystemElement_e;