You can find instructions and videos contributed by fellow early adopters in the RCGroups, Telegram, Discord and Rakish Rc youtube tutorials.
How to install, upgrade or restore original firmware
Developers guide, how to build
Features
Navigation
Proper shutdown (I see square icon)
USB connection
Powering by 2S Li-Po/Li-ion/18650
Mode 1 and Mode 3 radios
All optional hardware connections
Adjustable backlight level mod
Credits
Comparison with original firmware:
| Feature | FlySky i6X | OpenTX i6X |
|---|---|---|
| Channels | 6/10 | 16 |
| Mixers | 3 | 32 |
| Models | 20 | 16 / unlimited[1] |
| Protocols | AFHDS, AFHDS2A, PPM | AFHDS2A, PPM, CRSF |
| Trainer | PPM | SBUS, PPM |
| Logical switches | _ | ✓ |
| Global variables | _ | ✓ |
| Timers | _ | ✓ |
| Nicer sounds | _ | ✓ |
| Use trims as buttons | _ | ✓ |
| ExpressLRS ready | _ | ✓ |
| Telemetry mirror | _ | ✓ |
[1] Unlimited by using USB mass storage mode eeprom backup/restore.
- 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 V3 configuration built-in (no need to copy ELRSV3.lua)
- Telemetry
- Adjustable backlight brightness level (requires basic modification & 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
- AUX Serial port with modes:
- Telemetry mirror for AFHDS2A and CRSF
- SBUS Trainer
- Debug (on DEBUG builds)
| 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. |
FlySky FS-i6X don't have a software controlled shutdown button. Do not switch off radio when you see ▫ (small square) icon in top right corner of main screen. It indicates that settings are 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.
FlySky FS-i6X don't have a USB VBUS making it impossible to detect USB connection. To connect press OK on main screen and select "USB Connect" (In version 1.8.0 or earlier it's in: Radio Setup -> "USB Detect").
Automatic connection detection can be added by wiring PA15 pad to USB VBUS preferably with a resistor (I have used 1K).
FlySky i6X is officially rated for up to 6V. Running anything above may damage your radio.
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).
| PCB Pad | Function |
|---|---|
TX2 |
S.Port (CRSF) - required to connect ExpressLRS module |
PA9 |
AUX Serial port TX - Telemetry mirror |
PA10 |
AUX Serial port RX - SBUS Trainer |
PA15 |
USB connection detection |
PC13 |
External module power control (was PC9 up to OpenI6X 1.5.0) |
PC9+BL |
Wiring those together allows for adjustable backlight |
Wire PC9 and BL pads together.
- Janek (ajjjjjjjj), continues Kuba's and Mariano's work, added sound, USB, ExpressLRS V2/V3 configuration, telemetry mirror, SBUS trainer, new/fixed drivers, ports, bugfixes.
- Mariano (marianomd), continued Kuba's work and made it up to useable condition! Added AFHDS2A, PPM, CRSF.
- Kuba (qba667), started this work and made this project possible, it is forked from his repo.
- Wilhelm (wimalopaan) added 16 channels SBUS16 / IBUS16 modes.
- Tom (tmcadam) fixed AFHDS2A PWM mode selection.
- The internal RF code was taken from the great KotelloRC's erfly6: Er9X for i6 and i6x.
- Some of the internal RF fixes are a result of analysing pascallanger's DIY-Multiprotocol-TX-Module.
- ExpressLRS configurator is based on elrsV2/V3.lua from ExpressLRS.
- Some of the ports are from EdgeTX.
- ADC code taken from OpenGround.
- All the contributors of OpenTX.