Betaflight Telemetry and serial: CLI settings

Telemetry back to the radio (CRSF, SmartPort, FrSky, HoTT, IBUS, LTM, MAVLink), serial port options and MSP.

44 settings in Betaflight 2026.6. Each range and value list is read from the firmware's settings.c, each default from the CLI get of the release built for the simulator (no board config applied), 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	4.4	4.5	2025.12	2026.6
`crsf_tlm_accgyro` #	uint8 global	OFF, ON	`OFF` needs USE_TELEMETRY, USE_CRSF_ACCGYRO_TELEMETRY	—	—	—	✓
`frsky_default_lat` #	int16 global	-9000 to 9000	`0` needs USE_TELEMETRY, USE_TELEMETRY_FRSKY_HUB, USE_GPS	✓	✓	✓	✓
`frsky_default_long` #	int16 global	-18000 to 18000	`0` needs USE_TELEMETRY, USE_TELEMETRY_FRSKY_HUB, USE_GPS	✓	✓	✓	✓
`frsky_gps_format` #	uint8 global	0 to 1	`0` needs USE_TELEMETRY, USE_TELEMETRY_FRSKY_HUB, USE_GPS	✓	✓	✓	✓
`frsky_unit` #	uint8 global	IMPERIAL, METRIC, BRITISH	`METRIC` needs USE_TELEMETRY, USE_TELEMETRY_FRSKY_HUB, USE_GPS	✓	✓	✓	✓
`frsky_vfas_precision` #	uint8 global	0 to 1	`0` needs USE_TELEMETRY, USE_TELEMETRY_FRSKY_HUB	✓	✓	✓	✓
`hott_alarm_int` #	uint8 global	0 to 120	`5` needs USE_TELEMETRY	✓	✓	✓	✓
`ibus_sensor` #	uint8 global	15 comma-separated values, 0 to 255	`1,2,3,0,0,0,0,0,0,0,0,0,0,0,0` needs USE_TELEMETRY, USE_TELEMETRY_IBUS	✓	✓	✓	✓
`mavlink_ext_status_rate` #	uint8 global	0 to 50	`2` needs USE_TELEMETRY, USE_TELEMETRY_MAVLINK	—	—	✓	✓
`mavlink_extra1_rate` #	uint8 global	0 to 50	`2` needs USE_TELEMETRY, USE_TELEMETRY_MAVLINK	—	—	✓	✓
`mavlink_extra2_rate` #	uint8 global	0 to 50	`2` needs USE_TELEMETRY, USE_TELEMETRY_MAVLINK	—	—	✓	✓
`mavlink_extra3_rate` #	uint8 global	0 to 50	`1` needs USE_TELEMETRY, USE_TELEMETRY_MAVLINK	—	—	✓	✓
`mavlink_mah_as_heading_divisor` #	uint16 global	0 to 30000	`0` needs USE_TELEMETRY, USE_TELEMETRY_MAVLINK	✓	✓	✓	✓
`mavlink_min_txbuff` #	uint8 global	1 to 100	`35` needs USE_TELEMETRY, USE_TELEMETRY_MAVLINK	—	—	✓	✓
`mavlink_pos_rate` #	uint8 global	0 to 50	`2` needs USE_TELEMETRY, USE_TELEMETRY_MAVLINK	—	—	✓	✓
`mavlink_rc_chan_rate` #	uint8 global	0 to 50	`1` needs USE_TELEMETRY, USE_TELEMETRY_MAVLINK	—	—	✓	✓
`pid_in_tlm` #	uint8 global	OFF, ON	`OFF` needs USE_TELEMETRY	✓	✓	✓	✓
`reboot_character` #	uint8 global	48 to 126	`82`	✓	✓	✓	✓
`report_cell_voltage` #	uint8 global	OFF, ON	`OFF` needs USE_TELEMETRY	✓	✓	✓	✓
`serial_update_rate_hz` #	uint16 global	100 to 2000	`100`	✓	✓	✓	✓
`serialmsp_halfduplex` #	uint8 global	OFF, ON	`OFF`	✓	✓	✓	✓
`telemetry_disabled_acc_x` #	uint32 global	OFF, ON	`OFF` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_acc_y` #	uint32 global	OFF, ON	`OFF` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_acc_z` #	uint32 global	OFF, ON	`OFF` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_altitude` #	uint32 global	OFF, ON	`OFF` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_cap_used` #	uint32 global	OFF, ON	`ON` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_current` #	uint32 global	OFF, ON	`OFF` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_distance` #	uint32 global	OFF, ON	`OFF` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_esc_current` #	uint32 global	OFF, ON	`ON` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_esc_rpm` #	uint32 global	OFF, ON	`ON` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_esc_temperature` #	uint32 global	OFF, ON	`ON` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_esc_voltage` #	uint32 global	OFF, ON	`ON` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_fuel` #	uint32 global	OFF, ON	`OFF` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_ground_speed` #	uint32 global	OFF, ON	`OFF` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_heading` #	uint32 global	OFF, ON	`OFF` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_lat_long` #	uint32 global	OFF, ON	`OFF` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_mode` #	uint32 global	OFF, ON	`OFF` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_pitch` #	uint32 global	OFF, ON	`OFF` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_roll` #	uint32 global	OFF, ON	`OFF` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_temperature` #	uint32 global	OFF, ON	`OFF` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_vario` #	uint32 global	OFF, ON	`OFF` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`telemetry_disabled_voltage` #	uint32 global	OFF, ON	`OFF` needs USE_TELEMETRY, USE_TELEMETRY_SENSORS_DISABLED_DETAILS	✓	✓	✓	✓
`tlm_halfduplex` #	uint8 global	OFF, ON	`ON` needs USE_TELEMETRY	✓	✓	✓	✓
`tlm_inverted` #	uint8 global	OFF, ON	`OFF` needs USE_TELEMETRY	✓	✓	✓	✓

✓ 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 cloud build without it has no such setting.

Also in this section

These settings exist in 2026.6, but their default depends on build options the simulator build does not compile (DShot, RPM filter, board drivers), so it is not printed here rather than guessed: telemetry_disabled_sensors.

Other sections

Gyro and D-term filters (27)
PID tuning (73)
Angle, horizon and launch modes (20)
Rates and throttle curve (25)
Motors and ESC (23)
Receiver and RC link (32)
Failsafe and arming (14)
GPS (14)
GPS rescue (12)
Autopilot, position and altitude hold (66)
Battery and current sensor (28)
OSD (49)
OSD element positions (90)
VTX and camera control (12)
Blackbox and debug (20)
LED strip and beeper (12)
Sensors and board alignment (35)
System and hardware (25)

What changed between releases: 4.4 → 4.5 · 4.5 → 2025.12 · 2025.12 → 2026.6. Machine-readable: params.json (2026.6.2), GPL-3.0 like the firmware it comes from.