Radiomaster Nexus for Rotorflight @ Cédric Walter | Monday, Jun 17, 2024 | 4 minutes read | 651 Words | Update at Wednesday, Jun 26, 2024

The NEXUS Flybarless (FBL) control unit has been designed from the ground up based on the Rotorflight 2.0 reference design. All aspects of the NEXUS have been planned and tested for optimum performance and compatibility, ensuring the best out-of-the-box Rotorflight experience on the market today.

Rotorflight is a Flight Control software suite designed for single-rotor helicopters. It consists of: Rotorflight Flight Controller Firmware. Rotorflight Configurator, for flashing and configuring the flight controller

With its advanced STM32F722 MCU and the TDK ICM-42688-P 6-axis MEMS motion tracking device, which combines a 3-axis gyroscope and a 3-axis accelerometer, the NEXUS flight controller ensures precision control and flight. A large 128MB of onboard flash memory ensures you can log all your flights for fine-tuning and adjustment.

Our Plug’n’Play solder-free RP3-H ExpressLRS receivers feature a locking connector system to ensure a stable connection between the control unit and receiver. DSM and S.BUS ports are also available for use with your selected receiver type. The NEXUS also features multi-function ports for future expansion.

The NEXUS features a CNC machined aluminum case as standard, which looks great, protects the control unit, and dissipates heat for the F722 processor.

After more than 12 months of R&D, the NEXUS has been tested, tuned, and tested again by not only the developers at Rotorflight but also a team of experienced helicopter pilots who took part in our beta testing program. We would like to thank the Rotorflight team and the Beta testing team for making the NEXUS possible!

warning

R/C helicopters are not toys. R/C helicopter utilize various high-tech products and technologies to provide superior performance.Improper use of this product can result in serious injury or even death. Please read this manual carefully before using and make sure to be conscious of your own personal safety and the safety of others and your environment when operating all RC Helicopter products. I assume no liability for the operation or the use of this product. Intended for use only by adults with experience flying remote control helicopters at a legal flying field.

tip

Safety is paramount. Always follow safety guidelines, such as not flying near people, animals, or obstacles. Maintain a safe distance from other RC enthusiasts. Wear safety glasses to protect your eyes from debris.

tip

I translated the Rotorfligh configurator to French, took me 30h to complete. https://github.com/rotorflight/rotorflight-configurator/pull/82

Features

https://www.radiomasterrc.com/products/nexus-helicopter-flight-controller

ELRS

  • non-ELRS users don’t need to deal with dangling antennas.
  • ELRS users have a plug-and-play option with the RP3-H.

Update ELRS

ELRS RX version MUST match the ELRS TX version!

Using the WiFi method is the easiest.

  1. Plug the NEXUS with USB-C without LiPo and wait for 60s
  2. Download ExpressLRS configurator
  3. Build
  4. Connect to “ExpressLrs RX”
  5. Upload bin file

Mounting

WIP

Setup

Radiomaster Tx16s setup

use

Detailled Rotorflight setup

more https://www.youtube.com/watch?v=VcOebsyBGqM&list=PLy3TC1ILJYTht1pKEBHK4f_E6sJRLNp4v

or

Fast Rotorflight setup in 14 min

FAQs

Motors are not spooling

Does it spool if you use override? YES look at the arming flag to locate issue ( https://www.rotorflight.org/docs/Tutorial-Setup/Status#arming) , NO! you may need to calibrate ESC

Throttle position is higher than the min arm position

  1. Lower the throttle in your TX
  2. If you can’t make your throttle go lower on your TX you can increase the throttle channel value for Armin on the receiver tab

F.Port Support

If you want to connect f.port to sbus port then you need to switch the resources from rx to tx F.port is one wire only You connect it to SBUS slot Then in CLI you switch the resources

resource SERIAL_RX 2 NONE
resource SERIAL_TX 2 A03

f-port

Then in configurator you enable these two

Tips

  • A, B, C are nearly identical expansion ports
  • You can use the S.BUS port for ESC telemetry, if you are not using it for S.BUS or F.Port. You can use the S.BUS port for F.Port, and use the DSM port for ESC telemetry Or you can use any of the expansion ports for ESC telemetry

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Me

Cédric Walter is a French-Swiss entrepreneur, investor, and software engineer based in Zurich, Switzerland. He spent his career developing software applications for Swiss insurance companies to handle billions of dollars in premiums. He cofounded Innoveo AG and as the software architect developed the no-code platform designed to reduce the manual coding that powers many software apps. As an active participant in the European hacking community, he works on many open source projects including blockchain. Cédric is a winner of multiple hackathons. His expertise include designing back end, event-based, and blockchain systems. Cédric is also the founded Disruptr GmbH, a software development company that offers full spectrum of services for businesses of all sizes.

JAVA full-stack developer since 2000, in Blockchain since 2017, Certified Scrum Master 2012, Corda Certified Developer in 2019, Ethereum smart contract expert in the SWISS Blockchain Security working group

Hackathons

  • HackZurich 2022 – Level Up in top 25 finalist among 134 submissions
  • SBHACK21 – SwiFi winner of best Solution on Algorand, overall Winner 3rd Prize, CV Labs Fast Track Ticket
  • HackZurich 2020 Europe’s Biggest Hackathon winner in category Migros
  • SBHACK19 – LendIt winner of Swiss biggest Blockchain Hackathon. On chain insurance and ledger for agricultural land soil.
  • Member of the Bitcoin Association Switzerland and Cryptovalley association Switzerland,

PGP: DF52 ADDA C81A 08A6

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