in stock iNav Sirius™ AIR3  F3 SPI - Fixed Wing FPV Mission version, includes optimised M8N GPS - iNav 1.9 is the newest 2018 codebase to cater for auto-launch, stabilised flight, navigation, return to land (or Return to Loiter above you in an orbit) 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 the OSD HERE.  The AIR3 M8N GPS firmware has been specifically re-coded by us for iNav to suit both southern hemisphere and northern users. 

 Sirius™ Air3 + GPS Hardware Features for Airplanes

• AIR3 features a full inertial damping polycarbonate/CNC Aluminium base case, three internal LED's including GPS locked LED pulsing RED = home point recorded -  Riding on the GEL base are full suite of Sensors SPI MPU6500 Gyro/SPI Bosch 280 Acc/SPI Bosch BMP280 Barometer/ M8N GPS optimised for iNAV  (mag not used for fixed wing as heading is derived from the GPS) ;
• 19g including our super-strong metal/Polycarbonate case @47x32x18mm
• Full M8N GPS / Compass plug play - Optimised firmware for iNAV AU, NZ, USA, EU - This GPS in this form is unbelievably accurate - 25cm RTL results ; superfast start - typically finds 16-19 Sats in AU skies ; 15g @ 45mm Ø
• For conventional tail airframes - fixed wing - Supports dual aileron servos, Twin engine, Rudder and Elevator servos, GPS and OSD data Output to an OSD HERE
• for Delta or Wing - Supports Dual Elevon servos, Rudder servo, motor ESC, GPS and OSD data output
• 3 uARTs for GPS/Sbus or PPM/OSD and USB and 4th UART Soft Serial SS - see HERE - for Datalinks (Nav) see bottom of this page for mission planner/EZGUI
• Now ships with VBAT wire exiting case.... No dismantling required!!!!

iNav 1.9.0 Software

1. comes pre-coded with iNav >1.9.0 for  Fixed Wing. Our flight tested PIFFs (not PIDS) are already installed ;
2. download iNav UI from the Google Chrome store HERE
3. Download Mac OSX USB Silabs driver HERE ; install it for Mac USB
4. Download Window 64 bit USB  Silabs drivers HERE ; install it  for Windows USB

Features we like about iNav 1.9.0 software

1. Inertial based system - incredibly accurate --  with stable BARO calculations gives sub-metre accuracy - the included GPS typically finds 16-19 Sats even in Australia and is very fast to acquire, around 35 secs cold, instant acquire after battery exchange.  AIR3 will flash the red in 3/sec once the home point is recorded/locked.
2. Auto Launch control of fixed wings -> Set auto-launch then ARM ; then set your throttle to your normal climb power setting ; select Angle mode ; hand launch the Wing without fear of the prop (IMU detects launch throw then after release spools up) or wing drop (Acc is active) as the Sirius AIR3 iNav will hold the wings level ; once the launch "g" is detected the motor will then spool up, the wing will clim at the preset angle such as 10-20° ; you have 10 secs to pickup your Tx ; or as soon as you move the controls on the Tx - it's your aircraft again. Planes which were very hard to hand launch like Z2 are suddenly pussy-cats - more info below in FAQ
3. ACRO, Horizon or ACC modes with new PIFF gains - a new type of gyro/acc based servo controller (adjusted by CLI commands) debut in 1.6.0 - these make possible the use of fast servos with almost no jittering
4. A new "curve" based TPA which reduces gyro sensitivity at high throttle settings associated with fast cruise, and allows larger more responsive servo input at slow speed 
5. Return to loiter or land as per your settings for failsafe - We recommend to program your FrSky Rx to FAILSAFE mode preset (press X4R or X8R button with this mode action) as opposed to RTH - see here for details  and also HERE
6. Manual Mode now replaces Pass Through. This is a great change as now the servo travel and response (Limits and Rates )and centering is as setup on the RC Tab. 
7. Highly capable iNav Dev Team led by DigitalEntity DE here ; with monthly development cycles planned - We are a full sponsor of iNav - true believers in it's future - you can help HERE

Includes

• Includes firmware optimised M8N GPS module - plug-n-play ready ; 300mm lead wire
• Includes Sirius™ AIR3 pre-coded with iNAV 1.8 - tested by us - plug-n-play ready
• Includes Sbus wire for 16 Channels (we recommend a Max of 95% for Sbus Channels - this means don't set channels to 110 or 120% - only 95% or less) - can also be used for PPM by moving the white wire to pin3
• fly it with the Firmware it comes with BEFORE you get ahead of yourself and wipe the firmware (all our settings) - do a cli "dump" and save the text file -  After a few flights then make changes one at time and again backup your cli dump file.

Excludes /Recommended

• works to best advantage with Fast digital servos 
• requires a VERY stable noise-free uBEC with 5.0v
• Requires anti-brown out caps HERE
• Excludes OSD video overlay board - HERE is the recommended one
• Excludes compass - NOT used nor required by iNav Fixed wing.
• to connect a TBS Crossfire Rx to AIR3 iNav - Please follow this tech note HERE
• Can also be used with 6ch old style 1 wire per channel receivers - requires / excludes that 8 pins wire here 
• Optimised for Fast 333hz Metal gear servos such as CB215 or for larger planes these "Standard" size FAST coreless servos - to really get a responsive fixed wing with a "locked" feel, you will need coreless high speed servos - Slow servos defeat the purpose of such a fast Cortex ARM CPU chip with sensors running at 2k - then use a slow 50hz servo at 1/6th the speed of a 333hz servo and the loss from slower servo motor speed as well - fast servos have faster arc° times as well as faster update times.  Make sure you match the iNAV-UI servo speed setting to your servos in the Configuration TAB.

iNav setup

See the Q&A at the bottom of this page - scroll down

• iNav AIR3 info - use this page below as the primary source of info
• Also read @ Github  is a resource
• iNAV CLi commands explained HERE
• iNav Fixed Wing specific CLi commands ; then do a Page search there for "FW_"
  
• the iNav Fixed Wing intro page HERE
• For tuning, SUPPORT or Training = post your Video+CLi dump at RCGroups Chat thread and peer support is HERE ; and mention your problem
• search Youtube videos for AIR3 iNAV by Andrew Newton
• See our Q&A below

iNAV USB Port connection - install the Silabs USB drivers - from here Windows™ or Mac™ ; restart your computer -  be sure that the port selected in the top-right of iNav is the correct USB port  
PC, varies for each PC - ie COM3 etc =COM xx     or ;
Mac OSX SiLabs USB  = /dev/cuSLAB_USB -  115200
set USB speed to 115200 baud ; if you have a USB connection issue Quit iNav ; disconnect USB ; restart iNav ; reconnect USB.  Make sure the connection type on the left of the big blue "connect" button has the USB comm port and is not bluetooth, or click to select the correct USB port from that drop-down choice. Make sure if using OSD to disconnect OSD from the OSD board side rainbow ribbon plug whilst using USB.

uBEC Power - Join all your Servo RED wires into one and connect to 5.0v 3amp power Vcc to any of the 4 x RED center pins in the diagram above , and GND pins - be sure to use a large C1 Capacitor to handle servo amp spike demands (USB alone cannot drive servos as USB ports on PC usually have a low limit ~0.5amp) - For single motor airplanes or Wings connect 5.0v uBEC to Pin2

How do I use old style Analogue (Blue) Servos - that's all i have in my plane? Answer = For slow analogue servos (i.e. they not digital) set the iNav UI Configuration servo speed to 50hz (analogue).   The default of 333hz is for our fast digital servos.

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 (not required, not fitted for iNav fixed Wing Ops )

Team CarbonBird™ iNAV FAQ ©

My iNav F3 AIR3 won't arm - all the servos are dead ; Answer = iNav will not activate servos if the Receiver is either not on and powered/connected or not sending safe data from the Tx to the AIR3.  Check your selected Rx is set (such as Serial Rx SBus or for older Rx with multiwire setting choose PWM Rx one-wire-per-channel) Additionally the AIR3-iNav wont ARM if any of the ARM blockers are active such as 1. GPS home point not recorded (you are inside or next to a large building or tree)  2. Tilted IMU 3. Throttle not below 1100 uSecs 4. Gyro was moving around in first 10 secs after power applied. 5. 6-position ACC calibration not completed  6. (for Quads ) Compass not calibrated in 360° XYZ, clear of ferrous objects 7. Throttle not below min-throttle (usually this means 1090 or less) 8. Failsafe parachute = red ; is active 

What is iNav Airmode? Answer = We recommend you set Airmode in config panel of UI tabs, to always ON - this will provide servo flight control surfaces IMU responses when gliding with throttle at 0% ; with Airmode = off setting a zero throttle setting will disable the servos.

Can i connect AIR3 iNav to Spektrum™ Rx/Tx? Answer = Yes. You can connect your Spektrum™ by using the 8 wire connector rainbow colours to get flight control + 2 x Aux switches for modes - see THIS PHOTO - for DSM DSM2 or DSMX connection. Customers who have purchased an AIR3-iNav from us, can request our DX8 iNav model memory pre-set for AIR3 iNav, which will make setup for a DX8 very easy.

Can i connect AIR3 iNav to Spektrum™ DSM DSM2 or DSMX or Lemon Satellite receiver? Answer = Yes, this is the ideal Spektrum setup as you will get 4 x Aux channels for modes switches.. First create a new ACRO model memory, name it - then Bind the Satellite whilst connected to a temporary Rx so you have a steady amber LED. Disconnect it and set Ports/UART2 = Serial Rx ; Config Serial Rx Receiver =SpekSat ; then Spektrum 2048for DSMX. Save. Connect the Orange wire to the GPS red 3v3 lead ; The GND to Lower pin1 ; the Grey signal wire to lower pin6 - see this Photo HERE -  Customers who have purchased an AIR3-iNav from us, can request our DX8 iNav model memory pre-set for AIR3 iNav "SpekSat", which will make setup for a DX8 very easy.

Do i need to put my GPS on a lollipop stick?  Answer = No - absolutely NOT - this is a myth started by people whose airframes are poorly conceived, full of vibration, RMI and RFI, random wires - We STRONGLY recommend you twist then route servo, ESC 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, compass is not used in Fixed wing iNav.  its usually the compass which is spiking due to RMI. However RMI can also be inadvertently "injected" into any un-twisted signal wires such as GPS wires creating very high signal/noise ratios (in poor builds) which ignore our wire routing advice above.  Whilst a lollipop stick might comply with our 75mm clear rule, it's a sad fix as the lead wire may still be routed poorly. Far better to twist wires with GND wire - plan your wire paths and embed the GPS/Compass into the wing on the opposite side to the FPV Tx, and clear of the wing servos.

Does it matter which way the GPS/Compass pod faces on AIR3 iNav?  Answer = No - as the compass is not used, not fitted  in iNav Fixed wing calculations - you can mount the GPS pod exit wires facing any direction as long as the GPS faces up to the sky. 

How do i alter the direction of my Wing Servos? Answer = Go to the iNav UI SERVOS tab and select "Enable Live Mode" - on the right side for say Servo 3 - in the column marked "Direction and rate" change the drop-down Rate from +100% - to -100% then press SAVE

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 Taranis set the type of failsafe in the Tx to "No Pulses" with 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 :-

• Setting "failsafe_kill_switch = ON" will disarm you machine instantly when FAILSAFE mode is activated.
• Failsafe will disarm instantly if your throttle was low for more than 10 seconds (default).
• Failsafe RTH won't activate on airplanes when machine is closer that 5m (default) to home.
• Failsafe RTH won't activate on airplanes without compass if prior to that there was no motion faster than 3 m/s (to acquire heading).
• Failsafe will stay active after signal recovery until you move your Roll/Pitch stick.

How do i save AIR3 data via my SPort FrSky data SDCard in my Taranis live? Answer =  - it very easy to collect and store live AIR3 iNav data at the the ground, including GPS position data if the drone is lost - using Soft Serial (SS) on AIR3 and a 1KΩ resistor as per below.

I want to use an RC wing or a RC Delta fixed Wing with Rudder? My servo is not moving on Ch 5?  Answer = When flying a turn without rudder you will encounter adverse YAW - Using a Rudder(s) permits fast recovery from a spin, the joy of doing perfect stall turns, holding the nose up in a slow roll or 4 point rolls/harriers with a delta, permits a crab approach to hold runway centreline in a crosswind, flatter (reduced bank) turns, balanced turns and is desirable for Photogrammetry ops.  To active rudder in iNAV WING You must paste the code below into the WING cli and SAVE (essentially creating a custom mix with Rudder on pin 5 of AIR3) ; Then connect the Rudder servo (or two Rudder servos on a Y-Lead) as shown below (signal wire on M5 ; Servo GND/Vcc on Q2) - This is because the centre pins under M5 and M6 are OSD Tx/Rx data pins and not Vcc. 

# mixer
mixer CUSTOMAIRPLANE
mmix reset
mmix 0 1.0 0.0 0.0 0.0         # motor

smix reset
smix 0 2 0 -100 0         # servo 2 takes Stabilised ROLL
smix 1 3 0 -100 0         # servo 3 takes Stabilised ROLL

smix 2 4 1 100 0          # servo 4 takes Stabilised PITCH
smix 3 5 1 -100 0         # servo 5 takes Stabilised -PITCH

smix 4 4 2 -100 0         # servo 4 takes Stabilised YAW
smix 5 5 2 -100 0         # servo 5 takes Stabilised YAW

smix 6 6 8 -100 0         # servo 6 takes RC AUX 1 (camera yaw)
smix 7 7 9 -100 0         # servo 7 takes RC AUX 2 (drop bomb :-))

then type Save

for servos positions use : - 

3•L aileron      4•R aileron

     5•L tail   6•R tail

My flying area has lots of obstacles - so I want my Wing to retun home - but only to circle above the trees and not try to land?  Answer = in cli set  nav_rth_allow_landing = OFF - this way your wing will circle around the home point at the altitude set for the RTH.  You can also disable the RTH climb threshold if you prefer that is your decision option   set nav_rth_climb_first = OFF

What is the profile of the AUTO_RTL Landing phase? Answer = Current 1.8 fixed wing autoland is to a) return to home position at RTH altitude - so if you want it to return at 50m set nav_rth_altude=5000 b) circle, Loiter and descend in a spiral descent using a 50m radius of the home point until it contacts the ground- you can change the radius so if you want 60m set nav_fw_loiter_radius=6000 . This caters for the pilot to regain control during orbit (move Tx sticks) and fly it (or if Tx power lost - to get another batter installed in his Tx)

I have only ever flown Quads - Whats the best way to wire up servos in a fixed wing RC plane? Answer = Be sure to use a high quality uBEC.  Also Choose a uBEC with sufficient AMPS to power fast servos, and a stable 5v output with no electrical noise.  Fixed wing FPV (camera based ops) requires fast digital coreless servos or your wings are going to waggle all over the place; it's pointless having an F3 Arm chip CPU running at 8K and some old analogue blue plastic servos ! - Be sure to use FAST coreless digital servos and set the respective speed in the CONFIG tab of INav. Fixed wing RC ESCs should be selected for FPV for endurance - ie better efficiency using Active Freewheel.  

My iNav plane rolls weird - kinda corkscrews and rolls ? How do i set the servos for linear rolls along the roll axis? Answer = In regard to the Servos - be sure to understand mechanical Aileron differential to provide more up aileron than down aileron,  in a balanced roll.  This is done by positioning the Servo arms (for top mounted servos only)  leaning towards the back slightly 110° rather than 90° to the servo - if your servos are on the bottom of the wing the Aileron servo arms should be mounted with the horn leaning forwards at 70° to the servo rather than at 90°.

I want to connect a full featured OSD to my AIR3 ?  Use the Rx & Tx OSD pins  (Telem OSD Receive/Transmit + GND and 5v from the back pins R->T ; T->R of the AIR3)  then ; FOR OSD check UART1 is at 115200 as a msp in the PORTS tab of iNav (OSD requires UART1 set to 115200 only) ; and then enable telemetry in the Configuration tab, save (do not turn on OSD in iNAV Config). Be aware that OSD and USB both share UART Port 1 so if you want to go back into USB to alter iNav PIDs, then disconnect OSD at the OSD side temporarily  - Hero•32 F3 the 5.0v Vcc must be connected to the 5v +ve centre pin4  (see PHOTO HERE). Full OSD wiring Schematic is HERE

Should i do a hand launch at a steep angle upwards - throw it up? or should i throw it level? Answer = Risk management. It is much safer to throw an airplane LEVEL with the correct C of G set (and elevons up ~4mm for a wing) as the airplane will glide once it is thrown fast and level, provided airspeed exceeds stall speed at low angles of attack (ie level throw and elevons up - for a plane with elevator the elevator should be level or slightly up) - If you decide to throw the airplane upwards, or a friend throws it too soft  - there is a strong risk it will never achieve flying airspeed - stall - drop a wing and crash, before the motor can accelarate the craft back to flying speed.  So overall the safest maiden strategy is a good strong/hard & Level throw - overhand - so it's being thrown at 2m into the wind.  Alternative method is a DLG style toss - however the iNAV software will cancel any throw exceeding 45° tilt.

I really want to use iNav auto-launch but am worried my WING will be damaged on the first throw?  What is there to know to get this right?  Answer = Never install the prop until you are 100% sure of the system and test it live WITHOUT a prop. Wear eye protection and a strong leather glove. We setup Auto-Launch and pass-thru on the same switch so if there is an issue its easy to switch into pass-thru and fly manually - then set this into MODES tab.  Pick your weather and time for a maiden, wind is your friend.  Always throw the maiden into a decent headwind ; for zero ground speed a wind will automatically give you 10-15kph of airspeed on the throw.  Dead calm days are much harder to get a safe hand launch especially of a faster wing like a Zephyr.  establish the C of G - mark it with a pen or a few dots of CA like brail. check the C of G .  All Wings glide level with a slight amount of reflex = elevons about 4mm UP - then on Tx Set switch for ANGLE MODE - place the wing on the ground   1.place the Tx on the ground well clear (3-4m) of where you are going to step (this also ensures Taranis remains bound at 100%, as when the Tx is too close to the Rx the swamping will cause Taranis to go to failsafe and the launch detect will fail ) - Set throttle to zero, down full. 2. Flip your Auto Launch switch to ON 3. Set ARM switch to ON (the Acc is now waiting to detect "G" force - so be very careful at this point not to jerk the airplane around)  Also DO NOT bump your STICKS during launch!! if the sticks are now bumped the launch is effectively cancelled  4. Move your throttle up to approx 75%, the motor should not spin yet (enough power to hold airspeed in the climb phase /angle you have set in the cli)    5. Pick up the airplane,  Do NOT run, just Face the wind take one step as you throw the WING level (never try to throw the fixed wing up steeply as auto-launch will disable itself at 45° tilt ; We always throw level or slightly up like approx 5° max) - approx 0.5 secs after you throw it the motor will spool up to the cli settings you save.  6. Pickup the Tx calmly within 5 secs and take over by moving the Elev/Ailerons/Thro.  7. Turn off Auto Launch.  NOTE : Dummy Launch test in iNav - you can remove the Prop and do all steps above - just don't let go the WING after the throw "G" force - motor should spool up and run.

How do i know if my C of G is wrong on an RC fixed wing ?  Answer = Always maiden with the C of G as per factory settings (or slightly forward of that - the Elevons should have Reflex = UP by around 4mm) - then gradually move the LiPo back - the test is when too far forwards - an ailerons-only roll (trim for level flight then do a 360° roll without touching/using Elevator) will result in a large corkscrew flight path ; as the C of G comes backward the spiral will flatten towards a straight line.  Be aware that if the C of G crosses the rearward limit the plane/Wing will be uncontrollable - More info? C of G can also be calculated using eCalc.

How do i tune this new PIFF controller in iNav 1.6.0 or newer ?  Answer = the Fixed wing PIFF values are not shown in the UI PIDs page - not yet - atm they are so new they still exist only in the CLi page ; go to CLI and type "SET" return - you will now see fixed wing values with fw_    Tuning iNAV PIFF is covered HERE

How do i SAVE my iNAV settings after i made custom changes - What if i want to rollback 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

Can i use EZGUI and fly multi-point missions, mission planner with Air3 iNav ?  Answer = Yes - 433/915Khz 3DR style MavLinks will work  - you must have AIR3 1.7.1 or later to use soft serial on UART4 (SoftSerial1) set to MSP 9600 -  : Pins 7/8 , GND and 5v.  Now ships with 1.8.0 ; then in cli window type ...

feature SOFTSERIAL
return ; then save 

then go to ports tab and set as below

| Pin | Function         | AIR3 iNav 1.7.1 Notes                                

| --- | ---------------- | --------------------------------     

| 1   | Ground           |                                      

| 2   | +5V               |                                     

| 3   | RX_PPM          | Enable `feature RX_PPM`              

| 4   | unused           |                                      

| 5   | USART2 TX     | Airspeed sensor Sirius™ - see below to set                                    

| 6   | USART2 RX     | SBus                                 

| 7   | SS1 RX          | cli set `feature SOFTSERIAL`; then to MSP  above

| 8   | SS1 TX          |                                      

 

Note that software serial ports work unreliably at baud rates higher than 19200 bps - so 9600 is fine. Then use EZGUI

 

Question : I cannot see Sbus working in my UI for Taranis with X4R X8R L9R? Answer = Firstly check your Receiver X4R has a Steady GREEN bind light (not RED) when the Taranis in ON? then In the Taranis press MENU to go to page 1/12  (note the model number) then PAGE ; +++ set failsafe to NO PULSES ; check the model number is the same for the Rx ; or press - to goto BIND and re-bind it like this (with no pulses pre-set) . EXIT. When you turn off the Taranis you should see the red Rx LED and the RED parachute in the UI and in Failsafe tab should be set to RTH - check it.

  

 

then goto the PORT tab and make sure UART 2 is set to Serial Rx ; save ;  then go to Receiver Tab in UI - it should look as below ; the Receiver TAB in the UI (click image for large version) check it is TAER1234

 

If not then check again the White wire is coming out of the small lower port at the back of the AIR3 on pin 6 (NOT the servo pin 6 which is for Elevator servo only) and going into your Rx Sbus port the correct way around (not flipped over)

 

 

Which UART port does the GPS use? Answer= the Serial GPS which is a uBlox M8N uses the side port marked "FLEX" which is UART3 in PORTS-Tab ; the GPS will not auto detect ; so user must make sure his PORTs tab has UART3 selected to "ON" for GPS  ;

 

Is the Compass used for Fixed Wing? Answer = No, in iNAV a compass is not required nor used for FIXED-Wing as fixed wing fly forwards and flight direction is determined by CPU/GPS calculations

 

How do i connect the servos ? Answer - as per the diagram below (click the image for a larger version)

 

 

 

 

can i add Airspeed sensing to AIR3 iNav? Answer = Yes ; Connect the Sirius™ Pitot-static system to pin 5 (lime green in diagram above) ; connect GND and 5v +ve ;  In 1.8.0 you have airspeed reported via telemetry via OSD

set airspeed_adc_channel = 2

set pitot_hardware=ADC

save