INAV Video transmitter: CLI settings

VTX band, channel, power and pit mode, the low-power-on-disarm option, maximum power override and the SmartAudio and Tramp serial workarounds.

12 settings in INAV 9.1. Each range and value list is read from the release's src/main/fc/settings.yaml, each default from the release's settings.yaml, with each constant and C type resolved by INAV's own settings.rb against the SITL and flight-controller target headers, so a board's own config can still change it. Set one with set name = value, then save. Paste a diff all into the CLI checker to test it against any release.

Setting	Type	Range or values	Default	8.0	9.0	9.1	Notes
`vtx_band` #	uint8 global	1 to 5	`1` needs USE_VTX_SMARTAUDIO \|\| USE_VTX_TRAMP	✓	✓	✓	Configure the VTX band. Bands: 1: A, 2: B, 3: E, 4: F, 5: Race.
`vtx_channel` #	uint8 global	1 to 8	`1` needs USE_VTX_SMARTAUDIO \|\| USE_VTX_TRAMP	✓	✓	✓	Channel to use within the configured `vtx_band`. Valid values are [1, 8].
`vtx_frequency_group` #	uint8 global	FREQUENCYGROUP_5G8, FREQUENCYGROUP_2G4, FREQUENCYGROUP_1G3	`FREQUENCYGROUP_5G8` needs USE_VTX_SMARTAUDIO \|\| USE_VTX_TRAMP	✓	✓	✓	VTx Frequency group to use. Frequency groups: FREQUENCYGROUP_5G8: 5.8GHz, FREQUENCYGROUP_2G4: 2.4GHz, FREQUENCYGROUP_1G3: 1.3GHz.
`vtx_halfduplex` #	uint8 global	OFF, ON	`ON` needs USE_VTX_CONTROL	✓	✓	✓	Use half duplex UART to communicate with the VTX, using only a TX pin in the FC.
`vtx_low_power_disarm` #	uint8 global	OFF, ON, UNTIL_FIRST_ARM	`OFF` needs USE_VTX_SMARTAUDIO \|\| USE_VTX_TRAMP	✓	✓	✓	When the craft is disarmed, set the VTX to its lowest power. `ON` will set the power to its minimum value on startup, increase it to `vtx_power` when arming and change it back to its lowest setting after disarming. `UNTIL_FIRST_ARM` will start with minimum power, but once the craft is armed it will increase to `vtx_power` and it will never decrease until the craft is power cycled.
`vtx_max_power_override` #	uint16 global	0 to 10000	`0` needs USE_VTX_SMARTAUDIO \|\| USE_VTX_TRAMP	✓	✓	✓	Some VTXes may report max power incorrectly (i.e. 200mW for a 600mW VTX). Use this to override max supported power. 0 to disable and use whatever VTX reports as its capabilities
`vtx_pit_mode_chan` #	uint16 global	1 to 8	`1` needs USE_VTX_SMARTAUDIO \|\| USE_VTX_TRAMP	✓	✓	✓	Pit mode channel.
`vtx_power` #	uint8 global	0 to 8	`1` needs USE_VTX_SMARTAUDIO \|\| USE_VTX_TRAMP	✓	✓	✓	VTX RF power level to use. The exact number of mw depends on the VTX hardware.
`vtx_smartaudio_alternate_softserial_method` #	uint8 global	OFF, ON	`ON` needs USE_VTX_CONTROL	✓	✓	✓	Enable the alternate softserial method. This is the method used in INAV 3.0 and ealier.
`vtx_smartaudio_early_akk_workaround` #	uint8 global	OFF, ON	`ON` needs USE_VTX_CONTROL	✓	✓	✓	Enable workaround for early AKK SAudio-enabled VTX bug.
`vtx_smartaudio_stopbits` #	uint8 global	1 to 2	`2` needs USE_VTX_CONTROL	✓	✓	✓	Set stopbit count for serial (TBS Sixty9 SmartAudio 2.1 require value of 1 bit)
`vtx_softserial_shortstop` #	uint8 global	OFF, ON	`OFF` needs USE_VTX_CONTROL	✓	✓	✓	Enable the 3x shorter stopbit on softserial. Need for some IRC Tramp VTXes.

✓ present, Δ changed in that release (hover for what changed), — not in that release. “needs USE_…” is the build option the setting is compiled with: a target that does not define it has no such setting.Descriptions are INAV's own, from settings.yaml.

Other sections

Gyro and D-term filters (28)
PID tuning (74)
Rates, expo and TPA (32)
Navigation, RTH and waypoints (53)
Multirotor navigation (31)
Fixed-wing navigation and launch (63)
Position estimator (23)
GPS (11)
Accelerometer, compass and other sensors (56)
Receiver and RC input (21)
Failsafe and arming (18)
Motors, ESC and beeper (15)
Mixer profiles (12)
Servos, gimbal and head tracker (19)
Battery, current sensor and power limits (35)
OSD (114)
Telemetry (31)
Blackbox, logging and stats (12)
System (13)

What changed between releases: 8.0 → 9.0 · 9.0 → 9.1. Machine-readable: params.json (9.1.0), GPL-3.0 like the firmware it comes from.