Readme updates for new version (#192)

* Readme updates for new version
* protocols
* Shutdown clarification.
* 16 channels
* telemetry sensors count
* added save icon explaination
* added nightlies info
* added Mode 1 info.

README.md

@@ -4,38 +4,64 @@
 [![Release](https://img.shields.io/github/v/release/OpenI6X/opentx?include_prereleases)](https://github.com/OpenI6X/opentx/releases)
 [![GitHub all releases](https://img.shields.io/github/downloads/OpenI6X/opentx/total)](https://github.com/OpenI6X/opentx/releases)
 
-**OpenTX** port for the venerable **Flysky i6X** RC radio transmitter.<br>
+**OpenTX** port for the venerable Flysky FS-i6X RC radio transmitter.
+
+
 You can find instructions and videos contributed by fellow early adopters in the [RCGroups thread](https://www.rcgroups.com/forums/showthread.php?3916435-FlySky-I6X-port-of-OpenTX), [Telegram group](https://t.me/otx_flysky_i6x) and [Rakish Rc](https://www.youtube.com/c/RakishRc) youtube channel. 
 
-New developers are highly welcome! See [developers guide](https://github.com/OpenI6X/opentx/wiki/Contribute) and [known issues](https://github.com/OpenI6X/opentx/issues).
+New contributions are highly welcome! See [developers guide](https://github.com/OpenI6X/opentx/wiki/Contribute).
+
+### 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 <span style="color:green;font-weight:700;font-size:20px">✓</span> 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.
 
 ## Installation
 
 Go to the [wiki](https://github.com/OpenI6X/opentx/wiki) for detailed steps.
 
-## Implemented features 
+## Features 
 
-* AFHDS2A protocol
-* PPM in/out
-* CRSF with ExpressLRS and Crossfire modules, CRSFshot enabled
-  * MEGA Bauds up to 1.8M
-  * ExpressLRS V2 configuration (ELRSV2.lua port)
-* Telemetry
-* Audio tones, alarms and vario custom implementation
-* Bootloader (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")
+* Protocols:
+  * AFHDS2A with SBUS, IBUS and extended SBUS16, IBUS16 - 16 channels modes
+  * PPM in/out
+  * CRSF with ExpressLRS and Crossfire modules, CRSFshot enabled
+    * MEGA Bauds up to 1.8M
+    * ExpressLRS V2 configuration (ELRSV2.lua port)
+* 16 channels
+* Telemetry, up to 26 sensors
+* 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)
 
 ## Navigation
 
-| Key | Function |
-| --- | --- |
-| UP     | Up. Hold on main screen for stats. |                              
-| DOWN   | Down. Hold on main screen for telemetry |                                  
-| OK     | Confirm. Hold on main screen for model menu. |
-| CANCEL | Exit. **Hold for graceful shutdown - needed to save timers and some general settings.** |                      
-| BIND   | Go right in a line. Go to next page. Hold on main screen for general menu. |
-| LEFT POT |  Change edited value. |
-| RIGHT POT |  Scroll pages left/right. |
+| Key | Function                                                                           |
+| --- |------------------------------------------------------------------------------------|
+| UP     | Up. Hold on main screen for stats.                                                 |                              
+| DOWN   | Down. Hold on main screen for telemetry                                            |                                  
+| OK     | Confirm. Hold on main screen for model menu.                                       |
+| CANCEL | Exit.                                                                              |                      
+| BIND   | Scroll pages right or left (long press), go right in a line. Hold on main screen for general menu. |
+| LEFT POT | Change edited value.                                                               |
+
+
+## Shutdown
+
+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 stored. Wait until it disappears or use graceful shutdown method.
+
+FlySky FS-i6X don't have graceful shutdown button like other OpenTX devices, but you can trigger it by holding CANCEL button until screen turns off, then use switch.
+
+When to use this method:
+* With USB connected - when USB is connected then settings are not stored with standard delay.
+* To save timers.
+
+## Mode 1
+
+With Mode 1 radio 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).
 
 ## Hardware connections (optional)