How to install OpenTX CompanionHere, we will show you how to install OpenTX Companion on your Windows PC. With OpenTX Companion, you can upgrade firmware of radio, make a backup, and create a model.
If you are using EdgeTX, use EdgeTX Companion instead of OpenTX Companion.
Table of contents
Check compatibility of your radioYou can check the radio models currently supported by OpenTX Companion on the Radios page of the OpenTX official site. Recently released radios may not yet be compatible with OpenTX Companion. In that case, please wait for the version upgrade of OpenTX Companion. Or if you use EdgeTX, even radios that OpenTX does not support may already be supported, because the development pace is faster than OpenTX. You may want to consider migrating to EdgeTX.
Download OpenTX Companion
There is also a version called Nightly builds, but since this is a beta version, it may be unstable or contain bugs. This version is for developers, so please do not use it for general users.
Install OpenTX Companion
First screen is grant of the software license agreement. Click "I Agree".
By default, it will be installed in the folder with version number. This allows multiple versions of OpenTX Companion to co-exist on a single computer.
This screen can be called at any time by selecting [Settings]-[Settings] from OpenTX Companion menu.
If you purchase a new radio, you can register it by selecting [Settings]-[Radio Profiles]-[Add Radio Profile].
In the "Build Options" field, you can select whether to enable or disable various functions of the radio. This list of features will change depending on selected radio model. Hover your mouse cursor over each item name to see details of the function.
I think you should select "lua (enable Lua custom script screen)" and "internalmulti (support for internal 4IN1 MULTI-Module)". Select "internalELRS" for radios with a built-in ExpressLRS(ELRS) transmitter.
In "Default Int. Module", specify the type of transmitter (communication protocol between transmitter and radio) built into your radio. Select "MULTI" if it has a built-in 4in1 multi-protocol module, or select "CRSF" if it has a built-in Express LRS (ELRS).
Select "Default Stick Mode" and "Default Channel Order" according to your radio settings.
If you check "Append version number to FW file name", it will be easier to distinguish the version of the downloaded file.
Finally, click "OK".
If your radio's name isn't in "Radio Type" drop-down list, it's probably not yet supported by OpenTX Companion. Recently released radios may not yet be compatible with OpenTX Companion. In that case, please wait for the version upgrade of OpenTX Companion.
EdgeTX, which has a faster development pace than OpenTX, may already support even radios that OpenTX does not support. If you are using OpenTX, you may consider migrating to EdgeTX.
Install the driver : STM32 BOOTLOADERTo access the firmware of FPV drones and OpenTX/EdgeTX radios using STM32 processors on Windows PC, it is necessary to install a driver called "STM32 BOOTLOADER". Normally this driver is not installed automatically and must be installed manually. See below for details.
Access to radio: backup Flash memory and EEPROMRadio that uses OpenTX/EdgeTX has a "Flash memory" that stores firmware and boot loader, and an "EEPROM (Electrically Erasable Programmable Read-Only Memory) that stores model information and various setting information inside.
As a starting point, let's back up the initial firmware and EEPROM installed in the radio to your computer.
Then connect the radio to your computer with a USB cable and wait for a while.
This backup file can be written back to the radio by [Write Backup to Radio] menu.
Precautions when removing radio from computer
Upgrade OpenTX Companion
For details, see How to update radio firmware .