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

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

Bug fixes:
  • Removed glitches in camera warnings
  • Improved yaw control
  • Corrected trim implementation
  • Improved drone stability on the ground
  • Fixed logging issues