EdgeTX Widgets and Scripts

A collection of Lua widgets for EdgeTX-based radios.

---

Widgets

SwitchInfo

A widget that lets you annotate each physical switch on your radio with a custom label, so you always know what role each switch plays in your current model.

Supported radios: RadioMaster TX15 series, TX16 series.

Features

• Displays all switches in a grid layout, grouped by rows matching the radio's physical layout.
• Each switch box shows the switch name and your custom label.
• Empty switches are visually distinct from labelled ones (inverted colours).
• Labels are saved per model — switching models loads the correct set of labels automatically.
• Fullscreen / edit mode: tap any switch box to enter a label directly on the radio.

Switch layout

Radio	Rows
TX15	SE S1 S2 SF / SA SB SC SD / SW1 SW2 SW3 / SW4 SW5 SW6
TX16	SE SF SH SG / SA SB SC SD / LS S1 S2 RS / SW1 SW2 SW3 / SW4 SW5 SW6

Installation

1. Copy the Widgets/SwitchInfo/ folder to the WIDGETS/ directory on your radio's SD card.

2. On the radio, add the Switch Info widget to a fullscreen zone.

3. Open the widget in fullscreen to enter your switch labels.

Usage

1. long touch on widget to enter edit mode
2. tap any switch box to edit its label
3. use the keyboard to enter a label (max 10 characters)
4. press the back button to save the label and return to the main view

Data storage

Labels are saved automatically to /MODELS/<modelname>.switches on the SD card whenever a label is edited.

---

Games

Pong

A two-player Pong game for EdgeTX colour LCD radios, using the LVGL rendering API.

Supported radios: Any EdgeTX radio with a colour LCD and EdgeTtx 2.11 or later

Features

• Two-player local game — each player controls their paddle with a gimbal stick.
• Ball accelerates slightly on each paddle hit, capped at a maximum speed.
• Paddle angle influences the ball's deflection angle.
• First to 7 points wins.
• Title screen, pause, scored, and game-over states with on-screen overlays.
• Automatically adapts to stick mode (modes 1–4).

Controls

Action	Input
Player 1 paddle	Left gimbal vertical axis
Player 2 paddle	Right gimbal vertical axis
Start / Pause / Resume	ENTER
Quit	EXIT

Installation

1. Copy GAMES/pong.lua to the GAMES directory on your radio's SD card.
2. Access it from the radio's SD navigator.

or

1. Copy GAMES/pong.lua to the SCRIPTS/TOOLS/ directory on your radio's SD card.
2. Access it from the radio's Tools menu.

---

Mix Scripts

ccalc

A mix script that reads LiPo pack voltage from a cells sensor and outputs a state-of-charge percentage (CelP) using a discharge lookup table.

Requires: Radiomaster ERS-CV01 (or similar) configured as Cels.

Features

• Converts per-cell average voltage to a percentage via a 101-point discharge curve (Robbe table, origin 3.0 V).
• Works with both table output (FLVSS multi-cell) and single numeric output (auto-detects cell count).
• Tracks per-cell min/max voltages and pack-level min/max percentage across the flight.
• Publishes CelP as a custom telemetry value, available for use in other scripts, widgets, and audio triggers.
• Resets automatically when no sensor data is received (e.g. battery disconnected).

Output

Output	Range	Description
CelP	0–100	Pack state of charge (%)

The mix output is scaled to the EdgeTX internal range (0–1024), mapping directly to 0–100%.

Installation

1. Copy SCRIPTS/MIXES/ccalc.lua to the SCRIPTS/MIXES/ directory on your radio's SD card.
2. In EdgeTX, go to Model → Mix and add a new mix on the CelP channel with source set to Lua → ccalc.
3. Ensure your FLVSS sensor is bound and named Cels in the telemetry screen.

Usage

1. Power on your model and confirm that the Cels sensor is showing the correct voltage.
2. Go to telemetry sensors discovery to discover CelP that will contain the percentage remaining in the battery.

---

bcalc

A mix script that reads a total LiPo pack voltage from any named sensor and outputs a state-of-charge percentage using a discharge lookup table. Unlike ccalc, it works with any voltage sensor.

Requires: Any telemetry sensor reporting total pack voltage (default: RxBt).

Features

• Converts total pack voltage to a per-cell average, then maps it to a percentage via a 101-point discharge curve (Robbe table, origin 3.0 V).
• Auto-detects cell count from the measured voltage.
• Sensor name and output name are configurable at the top of the file.
• Publishes the result as a custom telemetry value, available for use in other scripts, widgets, and audio triggers.

Output

Output	Range	Description
BatP	0–100	Pack state of charge (%)

The mix output is scaled to the EdgeTX internal range (0–1024), mapping directly to 0–100%.

Configuration

Edit the two lines at the top of bcalc.lua to match your setup (if needed):

local myBatSensorName = "RxBt"   -- name of your total pack voltage sensor
local myBatPercentName = "BatP"  -- name of the telemetry value to create

Installation

1. Copy SCRIPTS/MIXES/bcalc.lua to the SCRIPTS/MIXES/ directory on your radio's SD card.
2. In EdgeTX, go to Model → Mix and add a new mix on the BatP channel with source set to Lua → bcalc.
3. Ensure your voltage sensor is bound and visible in the telemetry screen.

Usage

1. Power on your model and confirm that the Cels sensor is showing the correct voltage.
2. Go to telemetry sensors discovery to discover CelP that will contain the percentage remaining in the battery.

---

Telemetry Scripts

cells

A telemetry screen script for black-and-white 128×64 displays that shows individual LiPo cell voltages, per-cell percentage bars, total voltage, cell delta, and overall pack state-of-charge.

Supported radios: Any EdgeTX radio with a BW 128×64 display.

Requires: Radiomaster ERS-CV01 (or similar) configured as Cels.

Features

• Displays up to 8 cells in a 2-column grid, each showing cell index, voltage, and a percentage bar.
• Summary row shows total pack voltage (T:) and cell delta (D:), with the delta displayed inverted as a warning when it exceeds 0.1 V.
• Overall state-of-charge percentage shown large and centred at the bottom.
• Chemistry indicator (LP / HV) shown in the summary row.
• [ENTER] toggles between LiPo (4.20 V max) and LiPo-HV (4.35 V max) discharge curves.
• Publishes %bat as a virtual telemetry sensor.

Installation

1. Copy SCRIPTS/TELEMETRY/cells.lua to the SCRIPTS/TELEMETRY/ directory on your radio's SD card.
2. On the radio, open the telemetry screen list and select cells as a telemetry page.

Usage

1. Navigate to the telemetry screen on your radio.
2. Press [ENTER] to toggle between LiPo and LiPo-HV chemistry if needed.
3. Press [EXIT] to leave the telemetry page.

---

Tool Scripts

Graupner HoTT

A Tools-menu script that opens the Graupner HoTT receiver text menu directly on the radio, letting you configure the RX and any attached HoTT sensors (Vario, GPS, ESC, GAM, EAM, …) without a separate Smart Box. The original script has been fixed by 3djc to work with recent radios and EdgeTX versions, and the display now scales to fill both colour (480×272, 480×320, 800×480, …) and monochrome (128×64, 212×64) screens.

Supported radios: Any EdgeTX radio running the Multi protocol with a Graupner HoTT receiver bound.

Requires: HoTT telemetry available (Multi module in HoTT mode).

Features

• Renders the RX's native 21×8 character menu grid, including the cursor highlight.
• Navigate the receiver menu with the radio's keys (see Controls below).
• MENU cycles through the detected sensors (RX, Vario, GPS, Cust, ESC, GAM, EAM) — only sensors that are actually present are offered.
• Adapts automatically to colour and monochrome displays.
• Shows a "No HoTT telemetry…" notice when no data is received.

Controls

Action	Input
Enter / select	ENTER
Next / previous item	NEXT / PREV
Next / previous page	PAGE+ / PAGE−
Cycle through sensors	MENU
Exit	EXIT

Installation

1. Copy SCRIPTS/TOOLS/Graupner HoTT.lua to the SCRIPTS/TOOLS/ directory on your radio's SD card.
2. On the radio, open the Tools menu and run Graupner HoTT.

Usage

1. Bind your HoTT receiver and confirm HoTT telemetry is being received.
2. Run the script from the Tools menu; the receiver menu appears on screen.
3. Use the keys above to navigate and edit the RX/sensor settings, then press EXIT to leave (the script releases the buffer so normal telemetry resumes).

---

Graupner HoTT Model Locator

A Tools-menu script that helps you find a lost or crashed model using its HoTT RSSI. It produces a variometer-style audio cue (the beeps get faster and higher-pitched as the signal grows stronger) together with a colourised on-screen bar. Based on the Model Locator by Offer Shmuely / Scott Bauer, adapted for Graupner HoTT (RSSI scaled −115 dB…−15 dB → 0…100%) and updated by 3djc to scale across colour resolutions.

Supported radios: Any EdgeTX radio with a colour LCD.

Requires: HoTT telemetry with an Rssi sensor.

Features

• Audio feedback whose pitch/frequency tracks the RSSI strength.
• Large numeric RSSI readout (dB) plus a colourised bar graph (green = strong, red = weak).
• Layout scales from the original 480×272 design to any colour resolution.
• Shows "no telemetry" when the link is lost.

How to use it

• Simple way: walk toward the crash site — the beeps speed up and rise in pitch as you get closer, until you can spot the model.
• Accurate (triangulation) way: point the antenna straight away from you and find the weakest signal (lowest RSSI) — that bearing points at the model. Move to the side, find the weakest signal again, and triangulate the two bearings.

Installation

1. Copy SCRIPTS/TOOLS/Graupner HoTT Model Locator.lua to the SCRIPTS/TOOLS/ directory on your radio's SD card.
2. Place Model Locator (by RSSI).png and Model Locator (by RSSI).wav (from the original Model Locator distribution) in the same SCRIPTS/TOOLS/ directory — the script loads them at runtime for the image and audio cue.
3. On the radio, open the Tools menu and run Graupner HoTT model locator.

Usage

1. After a crash or fly-away, run the script from the Tools menu.
2. Follow the audio and bar feedback toward the model, or use the triangulation method above for a more precise bearing.

---

Special Function Scripts

Gimbal follow

A Special Function script that drives the RGB LED ring lights on the radio to reflect gimbal stick positions in real time.

Supported radios: TX15, TX16S MK3.

Features

• Maps each gimbal stick position to an angle on its corresponding LED ring.
• Lights up LEDs with a Gaussian spread (±2 LEDs) around the stick direction.
• Brightness scales with stick magnitude and speed of movement for responsive visual feedback.
• Skips LED updates when sticks are stationary (dead zone of 3 units) to reduce noise.
• Supports stick modes 1 and 2.

Installation

1. Copy SCRIPTS/RGBLED/gimbal.lua to the SCRIPTS/RGBLED/ directory on your radio's SD card.
2. In EdgeTX, go to Model → Special Functions and add a new function with:
   • Trigger: your preferred activation switch (or ON to always run)
   • Function: RGB leds
   • Value: select gimbal
   • Repeat: ON
   • Enable: ON

Usage

Activate the assigned Special Function switch. The LED rings will reflect the position of each gimbal stick.

---

Gimbal Battery level

A Special Function script that colours the RGB LED rings based on battery percentage, with a smooth green-to-red gradient.

Supported radios: TX15, TX16S MK3.

Features

• All 20 LEDs reflect battery state of charge at a glance.
• Smooth colour gradient between the configurable thresholds:
  • ≥ 90 % — pure green.
  • 90 % → 30 % — gradual transition from green through yellow/orange to red.
  • ≤ 30 % — solid red.
  • < 20 % — blinking red.
• Sensor name and thresholds are configurable at the top of the file.

Configuration

Edit the constants at the top of batt.lua to match your setup:

local SENSOR_NAME      = "%bat"  -- telemetry percent sensor name
local GREEN_THRESHOLD  = 90      -- >= this → pure green
local RED_THRESHOLD    = 30      -- <= this → pure red
local BLINK_THRESHOLD  = 20      -- < this → blinking red

Installation

1. Copy SCRIPTS/RGBLED/batt.lua to the SCRIPTS/RGBLED/ directory on your radio's SD card.
2. In EdgeTX, go to Model → Special Functions and add a new function with:
   • Trigger: your preferred activation switch (or ON to always run)
   • Function: RGB leds
   • Value: select batt
   • Repeat: ON
   • Enable: ON

Usage

Activate the assigned Special Function switch. The LED rings will reflect battery level.