OpenI6X: OpenTX for Flysky FS-i6X

You can find instructions and videos contributed by fellow early adopters in the RCGroups, Telegram and Rakish Rc youtube channel.

New contributions are highly welcome! See developers guide.

Nightly builds

If you want to have all the latest features, fixes (and bugs) you can download latest build here:

1. Go to: https://github.com/OpenI6X/opentx.
2. Click on ✓ icon next to latest commit id.
3. Click on "Details" next to build of your choice.
4. Click on "ARTIFACTS" tab.
5. Download .bin file with preferred language.

Installation

Go to the wiki for detailed steps.

Features

• Protocols:
  • AFHDS2A with SBUS, IBUS and extended SBUS16, IBUS16 - 16 channels modes
  • PPM in/out
  • CRSF with ExpressLRS and Crossfire modules:
    • CRSFshot
    • MEGA Bauds up to 1.8M
    • ExpressLRS V2 configuration (ELRSV2.lua port)
• 16 channels
• Telemetry, up to 26 sensors
• Adjustable backlight brightness (requires basic mod & backlight_mod build)
• Audio tones, alarms and vario sound custom implementation
• DFU bootloader - Start by pushing trims to the center, like regular OpenTX one
• USB Joystick & Storage modes (To enable on standard cable: General Settings > USB Detect: Once)
• AUX Serial port with modes:
  • Telemetry mirror
  • SBUS Trainer
  • Debug (on DEBUG builds)

Navigation

Key	Function
UP	Up. Scroll values. Hold on main screen for stats.
DOWN	Down. Scroll values. Hold on main screen for telemetry.
OK	Confirm. Hold on main screen for model menu. Short press on main screen for popup menu.
CANCEL	Exit/Back/Cancel.
BIND	Scroll pages right or left (long press), go right in a line. Hold on main screen for general menu.

Shutdown

FlySky FS-i6X don't have a software controlled shutdown button, therefore do not switch off you device when you see small square icon in top right corner of main screen - it indicates that there are settings not yet saved. Wait until it disappears or use "Save all" option from main screen popup menu.

When to use "Save all" option:

• When you don't want to wait until square icon disapper before shutdown.
• With USB connected - when USB is connected then settings are not stored with standard delay.
• To save timers.

USB connection

FlySky FS-i6X don't have a USB VBUS making it impossible to detect USB connection. This line can be added manually to make it work. Without the modification you have to go to General settings and set USB Detect to "Once" everytime you're connecting USB.

Mode 1 & Mode 3 radios

With Mode 1 & Mode 3 radios you may experience inverted gimbal movement and swapped gimbals on main screen. To fix this swap gimbal connectors (red-white one with black-white one).

Optional hardware connections

PCB Pad	Function
TX2	S.Port (CRSF)
PA9	AUX Serial port TX
PA10	AUX Serial port RX
PA15	USB VBUS (USB connection detection)
PC13	External module power control (it was PC9 up to OpenI6X 1.5.0)
PC9+BL	Wiring those together allows for adjustable backlight

Contributors

• ExpressLRS V2 config, USB support, sound support, bootloader, backporting, bugfixing - Janek (ajjjjjjjj) ongoing collaboration.
• All the RF code was taken from the great KotelloRC's erfly6: Er9X for i6 and i6x.
• ADC code taken from OpenGround.
• This work is based on Jakub's (qba667) work and is forked from his repo.
• All the contributors of OpenTX.