iNav Sirius™ AIR3 F3 SPI - Quad-X (or Tricopter/Avatar) FPV Mission version, includes M8N GPS / Compass - iNav 1.6.1 is the newest 2017 codebase to cater for incredible GPS lock, altitude Hold, stabilised flight, navigation, return to land with better than dji accuracy and uses a Google Chrome Extension UI, making it easy to connect, adjust and customise settings from your Mac or PC laptop using USB. Importantly for FPV Sirius™ AIR3 iNAV features OSD Tx/Rx pins externally to provide data to a MWOSD Minum such as Andromeda. The M8N GPS firmware has been specifically coded by us for iNav to suit both southern hemisphere and northern users.
Sirius™ Air3 + GPS Hardware Features
iNav 1.6.1 Software
Features we like about iNav 1.6.1 software
Training on iNav setup
iNAV USB Port connection - be sure the port selected is the USB port PC=Comm or ; Mac OSX = /dev/cuSLAB_USB - set speed to 115200 baud
iNAV Accelerometer Calibration (SETUP TAB) Calibrate button must be clicked 6 times for INERTIAL - so each time the AIR3 must be be in the 6 sequence different of assigned positions - hold until it shows completed in the log (USB arrow = front) 1. top of case up towards sky ; 2. flip upside down ; 3. on right side ; 4. with nose-up ; 5. on left side ; 6. with nose-down
iNAV Compass Calibration (only used for multicopters Quads,Avatar or Tricopters in iNAV - see SET UP TAB ; Note that fixed wing can only fly forward so heading is derived from GPS data in All iNAV fixed wings) - For Quads - after pressing calibrate mag rotate the AIR3/Quad with GPS/Compass pod fitted by 360° in 3 axis X, Y and Z within 30 secs
Team CarbonBird™ iNAV FAQ © Frequently Asked Questions, and Answers
Where is the "Front" of the GPS/Compass? Answer = GPS has no front as such, but the compass is located inside the pod - the front is by default the wire-exit-side - so if you face the wires exit to East - the UI will show 90°. CW 270° flip.
Compass Position and Calibration is that essential? Answer = YES absolutely critical - The compass must be located 75mm away from ESCs, 75mm away from FPV Cam & Tx and wires which are not shielded - must be twisted. Mount the compass first (on velcro or 3M tape) then build the entire Quad and remove props - but be sure to connect the LiPo - then do Compass Calibration in UI SETUP tab. in 30 secs rotate Quad 360° in X, Y and Z ; then goto Configuration TAB and enter your Magnetic Declination for your flying location based on the chart below (Red numbers are +ve and blue numbers are -ve)
Do i need to put my GPS on a lollypop stick? Answer = No - absolutely NOT - this is a myth started by people whose airframes are poorly conceived, full of vibration, RMI and RFI - We STRONGLY recommend you twist then route clear of servos, ESCs and the GPS lead "Wires" and pod >75mm away from other devices like ESC, OSD, FPV cams, uBECs, motor wires and LiPo wires. The GPS works in conjunction with a compass (in quads) and its usually the compass which is spiking due to RMI. However RFI can also be accidentally "injected" into un-twisted signal wires, such as GPS wires or I2C wires, creating very high signal/noise ratios in poor builds which ignore our wire routing advice above. Whilst a stick might comply with the 75mm clear rule on a mini drone, it's a last resort - in mini Quads also ensure NAV wires are very carefully routed and twisted/shielded. Best to twist wires with GND wire.
iNav Failsafe - Should i set Failsafe on my Rx or in iNav? Answer = Failsafe is a MODE setting in MODES tab of UI - If you have a digital Rx like X4R or X8R you should be sure to use and assign FAILSAFE rather than RTH as a mode in MODES tab; then in FAILSAFE TAB of UI - choose your preferred Failsafe action such as return to Land ; Take your prop off - and walk about 10-15m away from home point to test failsafe is working the way you expect when you turn the Taranis OFF/ON again Be aware :-
How do i SAVE my iNAV settings after i made custom changes - What if i want to roll back to a setting from a few days ago? I want these as backups for later, or to send to a friend? Answer = This is called a "CLi dump". with your Sirius™ AIR3 connected by USB goto the CLi Tab ; at the bottom type dump , return ; the screen will fill with data ; Use your mouse to select all the text ; COPY it - Create a folder on your PC/Mac ; Open a blank TextEdit Doc (plain text doc) ; Paste all the data into the blank text .txt file - (delete the top line "entering cli mode...) ; save each file with a smart name to allow Roll-back. Later when you want to restore a Sirius AIR3 - goto the CLi TAB and paste all this "dump" text ; Return ; once it's finished scrolling down ; type SAVE - the AIR3 is now fully restored to the Roll-back data.
How do i see whats "Different" about my iNav settings ? Answer = in CLi TAB ; type diff or diff all Diff all can also be used to backup to a text file but be sure not to include the defaults line at the top, only the rest