# Elios 3 LED patterns **⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ Blinks green (Imminent takeoff)** Drone is in arming delay state **⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ Blinks cyan (Firmware upgrade)** Esc upgrading / Payload updating / obc update flags (herelink / lidar / vio) **˗˗˗˗˗˗˗˗˗˗˗˗ Solid pink (USB Masstorage)** USB powered enabled and USB Host is detected **⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ Blinks light blue (binding mode)** Activated after holding button for 5-10s then will stay in this mode for 10s **⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ Blinks yellow (Battery lever open)** Battery lever not detected **⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ Blinks red (Battery critically low or error )** If battery SoC < 10% or Battery Communication error **-- -- -- -- Blinks light orange (Battery low)** If battery state SoC < 20% **⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ Blinks light orange (Onboard transmission system overheating)** CPU temperature above 90°C and not receiving remote controller commands **-- -- -- -- Blinks lite blue (Transmission system not connecting)** Aircraft does not receive remote controller signal or the latency is too big **-- -- -- -- Blinks lite yellow (Arming sequence blocked)** Arming sequence blocked, warning message should be displayed **˗˗˗˗˗˗˗˗˗˗˗˗ Solid green (Drone OK)** Drone Ok (default state - none of the above)