Some of the community driven and supported features include:
- Telemetry with advanced features
- User configurable input and channel assignments
- Mixes that allow for a large number of configurations
- Actions configurable based on events and values
- Announcement & Sound that are user configurable including adding custom audio files
- Custom user images (depending on transmitter)
OpenTX is downloaded and installed (flashed) on to compatible transmitters using the Companion For OpenTX computer software. Read the Companion guide and install Companion.
There are a number download (build) options selectable in Companion that will change the default firmware configurations and features available. For more information on this read the Transmitter Profile section of the Companion for OpenTX Guide.
Transmitter & Radio
In OpenTX the words transmitter and radio have been used interchangeably. Tx & TX are short forms of the word transmitter.
Transmitter Hardware’s Main Tasks
The transmitter has a computer, memory, a radio wave transmitting and receiving module, switches, knobs, buttons and control sticks (Throttle, Elevator, Ailerons & Rudder).
- Receives pilot inputs from control sticks (Throttle, Elevator, Ailerons & Rudder) and switches and passes it to the firmware.
- Transmits information from the firmware to the aircraft receiver.
- Displays information from the firmware on a screen.
- Receives telemetry from the aircraft receiver and passes it to the firmware.
Firmware’s Main Tasks
Hardware without software is like a human with a brain but without any knowledge, education and skills. All computer based transmitters require firmware (software) to be useful to a pilot.
The OpenTX firmware:
- Manages the transmitter ‘s hardware resources.
- Receives information from the transmitter hardware, processes it, and sends it back to the transmitter hardware.
Radio vs. Model Settings
Settings are grouped under two different sections in OpenTX as follows:
- Radio Settings relate to the transmitter and the firmware running on the transmitter.
- They are independent of the model being used.
- Some examples are date, time, language and calibration.
- Model Settings relate to the model being used.
- Each model has its own settings independent of other models.
- Some examples are receivers bound, timers, sensors and mixes.
Views, Menus & Settings
When the transmitter is turned on the screen displays information. The transmitter has navigation and selection buttons on either side of the screen. There are over 30 screens that can be navigated using buttons on either side of the screen. More…
The main view is the default view after the splash and warnings screens. This view shows information such as the model name, trim positions, transmitter battery voltage, flight mode and timer one. There are four main view screens. More…
Telemetry screens are optional and are displayed if configured on the display screen under the model screens section. They display model information as numbers or bars, or display a Lua script’s screen. There may be up to four telemetry view screens. More…
The model menu screens select which model profile to use and relate to information, settings and actions for the current model in use. More…
The transmitter menu screens relate to information, calibrations, configurations and actions that are independent of the model currently in use. More…
Sounds & Announcements
One of the main features of OpenTX is its use of a sound pack placed on a microSD card. This is one of the features that makes OpenTX user friendly and fun. More…
Using OpenTX Lua Scripts
OpenTX allows the addition of Lua scripts by the user to extend its abilities. More…
Keeping This Manual Up To Date
Please help keep this manual up to date. If you find that information is missing, incorrect on unclear please post on this manual’s thread in the Flite Test forum. More…
Examples & Mini Guides
- Altitude On Model Screen Top Bar
- Display Sensor Values
- Display Telemetry Screen
- Enabling Sensor Telemetry Logs
- Rename A Sensor
- Reset Telemetry & Relative Readings
- Telemetry Display On An iPad or iPhone
- Current – Setup (FAS40S)
- Current mAh Consumption
- G-RX8 – Redundancy & Variometer
- GPS – Setup
- GPS 2D Distance & 3D Range
- GPS Altitude Relative To Ground
- GPS In The Module Bay
- GPS Using Two Sensors
- RPM – Setup
- RPM Head Speed
Images & Icons
Sounds & Announcements
- Getting Started With Lua Function Scripts
- Getting Started With Lua Custom (Mix) Scripts
- Getting Started With Lua Telemetry Scripts
- Battery Capacity Remaining
- GPS Directions Home (Distance, Trip)
- Hand Launch Sequence
- Hold Any Input’s Position
- Lap Timer
- Quad Race Start Sequence – GoRace
- Head Speed