> For the complete documentation index, see [llms.txt](https://knowledge.flyability.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://knowledge.flyability.com/aircraft/elios-2/elios-2-system-update/elios-2-release-note.md).

# Elios 2 Release note

### **v1.7 January 2022**

New features:

* Compatibility with new E2RAD sensor payloads (LOW, MID, HIGH level)
* When a battery error is detected the drone goes into Autoland mode and the tablet  vibrates for 3 seconds to warn the pilot.
* LED blink patterns updated, they will now blink red in case of a battery warning or a critically low battery.

Bug fixes

* Wifi streaming reliability improved
* Transmission status logging fixed
* Maintenance panel information no longer gets stuck in 'loading' status

 

### **v1.6 August 2021**

New features:

* New Signal Strength indication - The two indicators on the top left corner now indicate downlink and uplink RSSI instead of a quality indicator as it’s more gradual and could prevent incidents in tricky environments such as sewers.
* Battery SoC displayed up to 60 cycles instead of 40
* Cockpit is now available in French, Spanish, German and Russian. Error codes added to warning messages.

Bug fixes

* Distance Lock controls fixed for Mode 1
* Big warning appearing in Cockpit about exceeded number of cycles of batteries also for new batteries fixed

 

### **v1.5 August 2021**

New features:

* Integration with Elios 2 RAD Radiation detector payload

Bug fixes

* Drone is no longer disarmed when performing the arming sequence when already armed

 

### **v1.4 November 2020**

New features:

* Photogrammetry flight mode now has grid lines overlaid to help with managing overlap during flight.
* Failsafe: After loss of signal the drone maintains altitude for 15 seconds, then starts the auto descent.
* Firmware update is only possible if drone battery voltage is higher than 16V\
  New warnings to communicate about hardware issues in the transmission system.
* Added warnings to communicate that motors are approaching or have exceeded the maximum recommended replacement interval of 25 flight hours.
* Added warnings to communicate that the battery is approaching or has exceeded the maximum recommended lifetime of 40 discharge cycles.
* Battery SoC estimation is shown only if battery cycles < 40\
  Warning to detect defective battery through high cells imbalance
* General improvements in vertical stability

Bug fixes:

* Camera Initialization improved to avoid recording error. Drone cannot be rearmed immediately after disarming to ensure proper video file termination.
* General bug fixes and improvements

### &#x20;**v1.3 March 2020**

New features:

* Distance lock setpoint is now tunable
* Improved tuning for auto closeup LED
* Drone blinks during arming sequence to estimate battery internal resistance
* Drone will not arm if battery is outside temperature range\
  Added more info to payload logs
* Avionics watchdog to debug avionics\
  Checks if camera SD Card is at least 64GB
* Will not start recording video if there is no space on SD card
* Better motion detection for IMU calibration
* Improved altitude control
* Live video feed switches to SD composite if HDMI error is detected\ <br>

Bug fixes:

* Removed glitches in camera warnings
* Improved yaw control
* Corrected trim implementation
* Improved drone stability on the ground
* Fixed logging issues


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