wimalopaan / opentx

OpenI6X: a FlySky I6X port of OpenTX

Welcome to Openi6X!

Custom OpenTX/EdgeTX for Flysky FS-i6X.

Join our Discord or Telegram.
You can find instructions and videos contributed by fellow early adopters in the RCGroups and Rakish Rc youtube tutorials.

• Wiki - Read before asking for help
  
  • How to install and upgrade firmware
    
  • Developers guide, how to build
    
  • Modifications
    
• Features
  
• Navigation
  
• Proper shutdown (I see square icon)
  
• USB connection
  
• Powering by 2S Li-Po/Li-ion/18650
  
• Mode 1 and Mode 3 radios
  
• Credits
  

Features

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	_	✓
Voice annoucements	_	✓[2]
Use trims as buttons	_	✓
ExpressLRS ready	_	✓
Telemetry mirror	_	✓

_{[1] Unlimited by using USB mass storage mode eeprom backup/restore.
[2] By adding DFPlayer, see modifications in wiki.}

• 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
• Audio tones, alarms and Vario sound custom implementation
• Voice annoucements
• DFU bootloader - Start by pushing horizontal 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)
• FlySky FS-HZCZ03-ADJ Digital Gimbal support

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. 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 disappear 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. 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).

Powering by 2S Li-Po/Li-ion/18650

FlySky i6X is officially rated for up to 6V. Running anything above may damage your radio.

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).

Credits

• 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 gimbals, buttons, 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.
• Rafael (rafolg), ported FlySky Hall Gimbal support from EdgeTX.
• 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.