LUA Reference Guide
2.7
2.7
  • EdgeTX 2.7 Lua Reference Guide
  • Introduction
    • Acknowledgments
    • Getting Started
  • Part I - Script Type Overview
    • Custom (Mixer) Scripts
    • Telemetry Scripts
    • One-Time Scripts
    • Function Scripts
    • Widget Scripts
  • Part II - EdgeTX Lua API Programming Guide
    • Lua Basics
    • Loading Code Modules Dynamically
    • Saving Memory
    • Using Key and Touch Events
    • Drawing Flags and Colors
    • Data Exchange with the EdgeTX Model Setup
    • Included Lua Libraries
      • io Library
        • io.open()
        • io.close()
        • io.read()
        • io.write()
        • io.seek()
  • Part III - EdgeTX Lua API Reference
    • Constants
      • Key Event Constants
      • Touch Event Constants
      • Flags and Pattern Constants
      • Color Constants
      • Special Character Constants
      • Screen Constants
      • Logical Switch Function Constants
      • Special Function Constants
    • General Functions
      • GREY()
      • accessTelemetryPush()
      • chdir(directory)
      • crossfireTelemetryPop()
      • crossfireTelemetryPush()
      • defaultChannel(stick)
      • defaultStick(channel)
      • getAvailableMemory()
      • getDateTime()
      • getFieldInfo(source)
      • getFlightMode(mode)
      • getGeneralSettings()
      • getGlobalTimer()
      • getLogicalSwitchValue(id)
      • getRAS()
      • getRSSI()
      • getRotEncSpeed()
      • getRtcTime()
      • getShmVar(id)
      • getSourceIndex(sourceName)
      • getSourceName(sourceIndex)
      • getSwitchIndex(positionName)
      • getSwitchName(switchIndex)
      • getSwitchValue(switchIndex)
      • getTime()
      • getTxGPS()
      • getUsage()
      • getValue(source)
      • getVersion()
      • ghostTelemetryPop()
      • ghostTelemetryPush()
      • killEvents(key)
      • loadScript(file [, mode], [,env])
      • multiBuffer(address[,value])
      • playDuration(duration [, hourFormat])
      • playFile(name)
      • playHaptic(duration, pause [, flags])
      • playNumber(value, unit [, attributes])
      • playTone(frequency, duration, pause [, flags [, freqIncr]])
      • popupConfirmation(title, message, event)
      • popupInput(title, event, input, min, max)
      • popupWarning(title, event)
      • resetGlobalTimer([type])
      • serialRead([num])
      • serialWrite(str)
      • setSerialBaudrate(baudrate)
      • setShmVar(id, value)
      • setStickySwitch(id, value)
      • setTelemetryValue(id, subID, instance, value [, unit [, precision [, name]]])
      • sources([first[, last]])
      • switches([first[, last]])
      • sportTelemetryPop()
      • sportTelemetryPush()
    • Model Functions
      • model.defaultInputs()
      • model.deleteFlightModes()
      • model.deleteInput(input, line)
      • model.deleteInputs()
      • model.deleteMix(channel, line)
      • model.deleteMixes()
      • model.getCurve(curve)
      • model.getCustomFunction(function)
      • model.getFlightMode(index)
      • model.getGlobalVariable(index, flight_mode)
      • model.getInfo()
      • model.getInput(input, line)
      • model.getInputsCount(input)
      • model.getLogicalSwitch(switch)
      • model.getMix(channel, line)
      • model.getMixesCount(channel)
      • model.getModule(index)
      • model.getOutput(index)
      • model.getSensor(sensor)
      • model.getTimer(timer)
      • model.insertInput(input, line, value)
      • model.insertMix(channel, line, value)
      • model.resetSensor(sensor)
      • model.resetTimer(timer)
      • model.setCurve(curve, params)
      • model.setCustomFunction(function, value)
      • model.setFlightMode(index, params)
      • model.setGlobalVariable(index, flight_mode, value)
      • model.setInfo(value)
      • model.setLogicalSwitch(switch, value)
      • model.setModule(index, value)
      • model.setOutput(index, value)
      • model.setTimer(timer, value)
    • Lcd Functions
      • Lcd Functions Overview
      • lcd.RGB(r, g, b | rgb)
      • lcd.clear([color])
      • lcd.drawAnnulus(x, y, r1, r2, start, end [, flags])
      • lcd.drawArc(x, y, r, start, end [, flags])
      • lcd.drawBitmap(bitmap, x, y [, scale])
      • lcd.drawChannel(x, y, source, flags)
      • lcd.drawCircle(x, y, r [, flags])
      • lcd.drawCombobox(x, y, w, list, idx [, flags])
      • lcd.drawFilledCircle(x, y, r [, flags])
      • lcd.drawFilledRectangle(x, y, w, h [, flags])
      • lcd.drawFilledTriangle(x1, y1, x2, y2, x3, y3 [, flags])
      • lcd.drawGauge(x, y, w, h, fill, maxfill [, flags])
      • lcd.drawHudRectangle(pitch, roll, xmin, xmax, ymin, ymax [, flags])
      • lcd.drawLine(x1, y1, x2, y2, pattern, flags)
      • lcd.drawLineWithClipping(x1, y1, x2, y2, xmin, xmax, ymin, ymax, pattern [, flags])
      • lcd.drawNumber(x, y, value [, flags [, inversColor]])
      • lcd.drawPie(x, y, r, start, end [, flags])
      • lcd.drawPixmap(x, y, name)
      • lcd.drawPoint(x, y)
      • lcd.drawRectangle(x, y, w, h [, flags [, t]])
      • lcd.drawScreenTitle(title, page, pages)
      • lcd.drawSource(x, y, source [, flags])
      • lcd.drawSwitch(x, y, switch, flags)
      • lcd.drawText(x, y, text [, flags [, inversColor]])
      • lcd.drawTextLines(x, y, w, h, text [, flags])
      • lcd.drawTimer(x, y, value [, flags [, inversColor]])
      • lcd.drawTriangle(x1, y1, x2, y2, x3, y3 [, flags])
      • lcd.exitFullScreen()
      • lcd.getColor(flags)
      • lcd.getLastLeftPos()
      • lcd.getLastPos()
      • lcd.getLastRightPos()
      • lcd.refresh()
      • lcd.resetBacklightTimeout()
      • lcd.setColor(colorIndex, color)
      • lcd.sizeText(text [, flags])
    • Bitmap Functions
      • Bitmap.getSize(name)
      • Bitmap.open(name)
    • Filesystem
      • dir(directory)
      • fstat(path)
  • Part IV - Advanced Topics
    • Lua data sharing across scripts
    • Debugging techniques
    • Speed/memory optimizaton tricks
  • Appendix
    • Fonts
    • Units
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On this page
  • Overview
  • Lifetime
  • File Location
  • Interface
  • Example
  • Notes:

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  1. Part I - Script Type Overview

Telemetry Scripts

Overview

Telemetry scripts are used for building customized screens. Each model can have up to three active scripts as configured on the model's telemetry configuration page. The same script can be assigned to multiple models.

Please note: Telemetry scripts are only available on radios with telemetry screens, such as e.g. FrSky Taranis models (including Xlite), Radiomaster TX12 and and Jumper T12.

Lifetime

  • Telemetry scripts are loaded when the model is selected.

  • init function is called one time when the script is loaded

  • background function is periodically; both when the telemetry screen is visible and when it is not.

  • run function is called periodically only when the telemetry screen is visible

  • script is stopped and disabled if it misbehaves (e.g. run-time error or low memory)

  • all telemetry scripts are stopped if a one-time script is running (see One-time scripts)

File Location

Scripts are located on the SD card in the folder /SCRIPTS/TELEMETRY/<name>.lua. File name length (without extension) must be 6 characters or less (this limit was 8 characters in OpenTX 2.1).

Interface

Every script must include a return statement at the end, defining its interface to EdgeTX. This statement returns a table with the following fields:

  • init function (optional)

  • background function (optional)

  • run function

Example

local function init()
  -- init is called once when model is loaded
end

local function background()
  -- background is called periodically
end

local function run(event)
  -- run is called periodically only when screen is visible
end

return { run = run, background = background, init = init }

Notes:

PreviousCustom (Mixer) ScriptsNextOne-Time Scripts

Last updated 3 years ago

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The event parameter indicates which transmitter key has been pressed (see ).

Key Events