Rooster + DJI Caddx Vista Retrofit

By jseaber on Oct 31, 2020

4  678  2

Converting the old Armattan Rooster to digital was easier than planned, and I'm thrilled with the result! This is a 6" build, which has the same body as the 5" kit. It's just as fun for freestyle as it is for mid-range crusing. In calm winds, it runs nearly 7min on a 5S 1300mAh pack.

Here's the original build in analog glory:

The old CLRacing F4S v1.5 is almost a perfect match for digital, with its 9V @ 2A regulator to drive the Vista air unit. But I'd already used up all UARTs for Crossfire and GPS. Luckily, UART1 can be freed for the Vista by disabling the inversion circuit through CLI: The "SBUS" pad becomes RX1, and TX1 is found on the bottom of the board.

DJI Mounting
Stack space on the Rooster is limited, so mounting the Vista was only possible thanks to the indivdual ESCs. I made a few small changes to increase stack height:

  • Installed 3mm nylon spacers beneath the flight controller (borrowed from an old FC)
  • Installed 2mm TPU spacers and a TPU 30mm to 20mm adapter plate above the FC. These were necessary to prevent the Vista from colliding with the FC and its DFU button. I had to manually cut off the standoffs embedded in the adapter print.
  • Installed 4mm aluminum spacers to raise the top plate
  • Installed TPU Micro to Mini camera adapter (slightly different design from the link)
  • Rotated the Vista about 30 degrees and secured to the TPU adapter plate with E6000. Yeah, it's graceful.

Antenna Mounting

I kept the SMA-to-UFL adapter and mounting from the analog setup, since the Vista also uses UFL. The antenna is the cheapest LHCP with SMA on GetFPV.


Part List


Rooster (140 builds)

Flight Controller

CL Racing F4S Flight Controller PDB OSD AIO (144 builds)


4 x DYS Aria BLHeli_32bit 35A ESC (20 builds)


4 x T-Motor HOM 2207.5 1750kv/2500kv Motor


Azure Power 6145 BSP - Big Smooth Props (Set of 4 - Clear)

FPV Camera

Caddx Vista Digital HD VTX Air Unit Kit for DJI - Choose Your Cable Length (191 builds)


TBS Crossfire Immortal T V2 Antenna (148 builds)


XILO Pagoda 2 5.8GHz Antenna (LHCP)


TBS Crossfire Nano Rx - FPV LONG RANGE DRONE RECEIVER (1468 builds)


Thunder Power 1300mAh 5s 100c V2.0 Adrenaline Series Lipo Battery


RadioMaster TX16S Multi-Protocol RF Module OpenTX 2.4GHz RC Transmitter w/ V3 Hall Gimbals (92 builds)


DJI Digital HD FPV Goggles (140 builds)

3D Printed

Rooster Crossfire Immortal T Antenna Mount by pathfinderzero
See Site

3D Printed

30mm to 20mm Drone Flight Control Adapter by theFPVgeek
See Site

3D Printed

M3 Spacers by V4N
See Site

3D Printed

Runcam Micro Swift 3 Camera Mount - Armattan Rooster by westendriot
See Site


M3 Nylon Nut 4 Pack (5 builds)


4 x McMaster-Carr (4 builds)
See Site

Misc Parts

Beitian Dual BN-220 GPS GLONASS Antenna Module TTL Level RC Drone Airplane (68 builds)

Misc Parts

E6000 2 Fl oz Multi purpose Craft Glue
See Site
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JohnnyBravo   Jun 13, 2021  

Thank you for this article

Can you please post a link to the (slightly different) camera mount STL you've used

jseaber   Jun 15, 2021 

Sorry, I lost the link by the time I posted. You should find many options for mini-to-micro camera adapters. Any will suffice.

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