Special Functions of Monochrome Remote Controllers

1. Special Functions

The Special Functions section is where you can configure the special functions included in EdgeTX. These special functions add additional capabilities beyond normal model control, such as enabling trainer mode, playing sounds, adjusting radio backlight, adjusting radio volume, etc.
On the special functions screen, you will see all configured special functions along with some configuration options such as function name, activation switch, whether the function is enabled, and other configuration options.

1.1 Configuring Special Functions

1. Select the desired special function line and press the [Enter] button.
2. Then, use the [Roller] to scroll and select the property you want to edit (it will be highlighted), and press the [Enter] button to edit it (it will now flash).
3. Edit the options by scrolling with the [Roller] and pressing the [Enter] button to select the desired option.
4. After configuring all options, press the [Return] button to exit the special function's edit mode.
   All special functions have the following configuration options. Depending on the selected function, additional options may be added. For these additional options, see the Function section below.

• Trigger - The switch or trigger that activates the special function. Long-pressing this section will allow you to quickly select the switch category and filter the results. You can select the following filters: Switch, Trim, Logical Switch, Other, and Invert
• Function - The function to be used. See the function descriptions below.
• Enable - Toggle on/off to enable the function. To be able to activate the special function via a switch, it must be enabled. This option is usually the last option listed in the checkbox on the far right of the screen. A disabled special function will not work regardless of the configured switch position.

1.2 Related Functions

Below is a list of all available functions in EdgeTX, what they do, and the additional configuration options that will be displayed when selecting a function.
Override (Channel Override) - Override a defined channel with a defined value.

• CH - The channel to override
• Value - The value to replace the normal channel value. (Range -100 to +100)
  Trainer - Enable trainer mode.
• Value - Specify the controls to be given to the student. Options include Stick (all sticks), Rudder, Elevator, Throttle, Aileron, and Channel (all channels).
  Instant Trim (Instant Trim) - Set all trims to their current stick values.
  Reset (Reset Timer) - Reset a timer or telemetry-specified value to its initial value.
• Reset - Options are Timer 1, Timer 2, Timer 3, All, and Telemetry.
  Set (Set Timer) - Set the specified timer to a specified value.
• Timer - Options are Timer 1, Timer 2, Timer 3
• Value - Range is 00:00:00 to 08:59:59
  Adjust (Adjust Global Variable) - Change the value of a specified global variable.
• Global Variable - Select the global variable to adjust.
• Mode - Select the mode for changing the global variable. Options are: Constant, Mixer Source, Global Variable, Inc/Dec. Long-press the [Enter] button to select mode.
  • Constant - Set the specified global variable to a defined constant value.
  • Mixer Source - Set the specified global variable to a defined mixer source value.
  • Global Variable - Set the specified global variable to a defined global variable value.
  • Inc/Dec - Increase/decrease the specified global variable by a specified amount.
    Volume - Change the radio volume. The source of change is specified in the volume dropdown menu.
    Set Failsafe - Set the custom failsafe value for the selected module (internal/external) to the current stick position when activated. For this option to work, the failsafe mode of the RF module must be set to Custom.
    Play Sound - Play the sound selected in the value field when activated.
• Value - The sound to play. Possible values are Beep1/2/3, Warn1/2, Cheep, Ratata, Tick, Siren, Ring, SciFi, Robot, Chirp, Tada, Crickt, AlmClk. Note: No SD card sound pack is required.
• Repeat - The frequency of sound repetition. Options are !1x (Don't play on startup even if switch is active), 1x (Play once), 1s to 60s (Play every xx seconds).
  Play Track - Play the .wav sound file selected in the value field when activated.
• Value - The .wav sound file to play from the SD card.
• Repeat - The frequency of track repetition. Options are !1x (Don't play on startup even if switch is active), 1x (Play once), 1s to 60s (Play every xx seconds).
  Play Value - Announce the value of the element selected in the value field.
• Value - The source of the value to be announced. Can be input, stick, knob, slider, trim, physical and logical switches, trainer input channel values, global variables, telemetry sensors, or channels.
• Repeat - The frequency of announcement. Options are !1x (Don't announce on startup even if switch is active), 1x (Announce once), 1s to 60s (Announce every xx seconds).
  Lua Script - Execute the Lua script defined in the value field. The Lua script must be located in the /SCRIPTS/FUNCTIONS/ folder on the SD card. Lua scripts that display screen information cannot be executed through this special function.
• Value - The LUA script file to play from the SD card.
• Repeat - The frequency of Lua script repetition. Options are: ON (Infinite repeat as long as the switch is active) or 1x (Once)
  Background Music - When enabled, loop the .wav file selected in the value field. The file should be located in the SOUNDS/(language)/ folder on the SD card.
  Background Music II - Temporarily pause the .wav file specified in Background Music.
  Vario - Enable the vario beep for model ascent and descent.
  Haptic - When enabled, make the radio vibrate (haptic feedback).
• Value - The vibration pattern type. Options are: 0 - 4.
• Repeat - The frequency of vibration pattern repetition. Options are !1x (Don't vibrate on startup even if switch is active), 1x (Vibrate once), 1s to 60s (Vibrate every xx seconds).
  SD Log - Create a log.csv file of radio and telemetry values in the LOGS folder on the SD card. The radio will create new entries in the log file according to the frequency configured in the Value setting.
  The Value options are 0.0s - 25.5s (Note: 0.0 effectively disables this option). Each time the function is activated, as long as the function is active for at least as long as the Value setting, the radio will create a new log file.
  Backlight - Adjust the screen contrast (LED screen) or OLED brightness (OLED screen) according to the source defined in the value dropdown menu.
  Screenshot - Create a screenshot as a .bmp file in the SCREENSHOT folder on the SD card.
  Race Mode - Enable race mode (low latency) for FrSky Archer RS receivers. Race mode must also be enabled in the external RF module settings.
  Audio Amp Off (Selected Radio) - Disable the audio amplifier so that the speaker does not produce sound, including annoying feedback or interference. This option is only available on the selected radio.
  RGB LED - Execute the selected LED-related Lua script in the Scripts -> RGBLED folder on the SD card.
  ——This article is cited from the EdgeTX User Manual: https://zkl2333.gitbook.io/edgetx-user-manual/bw-radios/model-select/special-functions**