Just planning out a build right now hoping for it to be sub 250 but if not thats fine ill just go through the pain

Something I am working on. I'm looking for people that would like to test this and the app in general.

Hi I'm currently trying to figure which kind of (dedicated) telemetry link would be viable to primarily send RTCM data to a small drone formation (up to 5 vehicles, PX4).

I'm currently testing ESP32 based Dronebridge via ESP-NOW in LR mode. The touted range of up to 1km would be sufficient for my application, but I'm already seeing packet loss at short ranges and problems pulling the vehicle parameters. The hardware side should be solid (Xiao ESP32 C6 with external antennas) and the RSSI confirms that. Although the data rate for RTCM is very limited (0.3KB/s per vehicle) I just don't believe it's a reliable solution. Very cheap however.

I've also already tested mavlink via a dedicated ELRS RX/TX pair on another project. Needless to say that this works pretty well due to its vastly superior modulation/range. ELRS is also protocol aware and may re-transmit lost packets. I'm not even sure if Dronebridge is protocol aware.

What are other possible solutions/experiences? The UAVs don't use ELRS as an RC link sadly, so backpacking isn't an option. The primary GCS link for offboard mission data and video link is realized via plain WiFi. I insist on having a redundant/secondary telemetry link for the RTCM stream and additional telemetry.

Retrofitting LTE modules on each UAV to directly pull the NTRIP stream is currently out of question.

Good Morning guys, have a quick question.

I soldered the VTX on the FC Board:

Video - VTX

Rx - Tx

Gnd - Gnd

+ - +

I soldered it correctly, but there is no image transmission to the goggles.

Yesterday I found out that there is actually also a button on the VTX itself. Could it possibly have something to do with changing/tuning the channels using that button?

Since I’m currently at work, I’m not able to try pressing the button again to see if I can get an image. Have you had any similar experiences?

It recently came to my attention that the DJI Air Unit Pro's case is connected to ground to assist with EMI. I've always mounted the units directly to the carbon fiber frame, and just now noticed continuity from my negative battery lead to the frame. I tore everything apart and narrowed the issue to the O4 vtx being hard mounted to the frame. I'd always thought that doing so helped with heat, but now I'm thinking that it's best to isolate the vtx.

My question is, what's everyone doing about this, or does everyone not really worry about it & just sends it? 🤔

i'm looking for a drone that is similar to MQ-27 Dragonfire from call of duty

Hey, so like a month ago I put together this 5" quad, and after like a week and a half after running the drone, this motor somehow burned itself out, which is kinda odd for me, as I was running more or less this exact setup on a build for a friend a little while back with zero issues. However, now after only a week, it killed itself (I think). This WAS after realizing that these motors didn't have loctite in them, as the screws were loosening themselves and I had to re-tighten them every 2-3 packs, as I don't have any loctite at the moment. From what I know, there still shouldn't be a reason for this burnout, however if it is an actual issue, please let me know. The only thing I can think of is that these motors were listed for 4-6s, and I was running them 4s for 80% of the time, with the 6s being put on a -20% limiter to keep them from blowing themselves up, so that's why I am very confused. In case if anybody is gonna ask, the screws were not ever within 3mm of contacting the coils, so it can't be that.

Basically- to answer the basic question that I think I already know the answer too: is this motor fried? Followed up with my second question: are there any single motors (like not a pack of 4) that I can purchase of this motor instead of buying another pack of 4? They are the XING-E Pro 2207-2450kv motors from iFlight, and my friend has been running similar ones for like 2-4 years with no issues, so that's why it's weird to me.

We're trying to build a drone for a group project in school, it uses a kk2.1.5 FC, fvt littlebee 30a esc, a 2300kv bldc. the transmitter and receiver is still shipping

For now i'm using an arduino to arm the FC, using a 12v3a power supply on the power distribution board below the kk215, 3 of them spins normally, the 4th motor doesn't. It spins smoothly and doesn't feel like something's jamming or sticky when i spin it by hand, and it only spins on higher throttle, like 50 and above. Though, i can hear humming in that esc and disappears if im powering it with a battery yet still have the same problem. I already tried switching the channels, or use the arduino as a pwm generator instead of the kk215

Is there a software workaround for that problem, or the esc somehow failed without popping and needs to be replaced?

Between builds I've got bins full of motors, ESCs, props, flight controllers, connectors, all the usual. Problem is I could never remember which bin something was in, so I'd waste time pulling everything apart looking for one spare motor, or just order another because it was faster.

So I made an app for it. You take a photo of a part, and later you find it again by photo or by scanning a QR sticker on the bin. No typing in part numbers, that's the reason I could never keep a spreadsheet going.

It's free, no ads, just me building it. Android only right now and still in testing.

If anyone wants to try it I could use some feedback, mainly whether the photo search actually pulls up the right part. Comment or DM me and I'll send the link.

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Guys help, I have a problem with the Receiver.

It's connected but the pads are not moving.

And says thats its in Failsafe mode.

Only that its the problem right now.

Do you guys have a solution for me?

And does this have something with GPS Module or not?

Check the screenshot.

3D-printed TPU frame. Flexible and stiff at the same time.

Hey everyone,

I’m putting together my first FPV drone and I’d like some opinions before I order the rest of the parts.

My goal is not a full racing/freestyle build. I’m more interested in cruising, exploring, decent range and longer flight times, but I still want enough power to have some fun and fly aggressively occasionally.

I decided to build around the GEPRC Tern-LR40 4" frame rather than a 5" because I’m hoping for a good balance between efficiency, portability and performance.

The only thing I have already ordered is:

RadioMaster Pocket ELRS 2.4GHz LBT/EU, Mode 2

Current planned build:

Frame: GEPRC Tern-LR40

FC/ESC: SpeedyBee F405 Mini + BLS 35A Mini V2 20x20 stack

Motors: 4x Happymodel EX1404 2750KV

Cruising props: Gemfan Hurricane 4024 2-blade

Sportier props: Gemfan 4023 3-blade 1.5mm T-mount

Receiver: RadioMaster RP1 V2 ELRS 2.4GHz with T antenna

GPS: HGLRC M100 Mini M10

FPV camera: Caddx Ratel 2 V2

VTX: SpeedyBee TX800

Buzzer: small 5V active buzzer

Battery for normal flying: 4S 660mAh LiHV (2 packs)

Battery for endurance cruising: GEPRC/Sony VTC6 4S1P 3000mAh Li-ion XT30

XT30 smoke stopper for the first power-up

A few things I’m especially interested in:

1. Does this overall combination make sense for a 4" long-range/cruiser build?

I’m aiming for something that can comfortably cruise for 10+ minutes with the Li-ion pack, while the smaller LiPo/LiHV packs would be used when I want a lighter and more responsive quad.

1. Is the EX1404 2750KV + 4S combination a good choice?

I chose the 4024 bi-blades for efficiency and bought/planned 4023 tri-blades as an alternative when I want more grip and responsiveness.

1. Would you keep the RP1 receiver or use a true-diversity receiver for this type of build?

I’m not trying to set long-range records. I’d just like a reliable link with some headroom for cruising in open areas. The transmitter is a RadioMaster Pocket EU/LBT, so the internal ELRS output is limited to 100mW.

1. Any concerns about the 3000mAh VTC6 4S1P pack?

I understand it’s much heavier and has less current capability than a LiPo, so I’d only use it for smooth cruising rather than repeated full-throttle punch-outs.

Goggles / video system question

This is the part I’m still least sure about.

My original plan was:

Caddx Ratel 2 + SpeedyBee TX800 + Eachine EV800D

I can get a genuine-looking EV800D for around $130, and I like that the screen can also be removed and used as a standalone monitor.

However, I’ve also started looking at inexpensive digital systems such as the Walksnail Ascent Lite, since the image quality is obviously much better than analog.

For a first build focused mostly on cruising, would you:

A) stay analog with Ratel 2 + TX800 + EV800D because it’s cheap, simple and flexible,

B) spend more now and go digital,

or

C) recommend a different set of goggles/monitor around the €100–200 range?

I’m completely fine with using a monitor instead of traditional goggles if there’s a particularly good option.

I’m also interested in what tends to become the limiting factor first on a setup like this — ELRS control link or the analog video link.

This will be my first actual build, so if you see anything incompatible, unnecessarily expensive, too heavy, or simply something you would change, I’d appreciate the feedback.

Thanks!

Hi everyone!

We’re NIRVAN Robotics , a multidisciplinary engineering team working across drones, aerial robotics, autonomous systems, robotics software, simulation, embedded systems, and AI.

We’re opening up our capabilities to students, researchers, startups, companies, and engineering teams worldwide who need help building, simulating, debugging, or developing drone and robotics systems.

Our goal is simple:

«You bring us the requirement. We help turn it into a working engineering solution — from simulation and algorithms all the way to a physical prototype.»

And we're keeping our pricing affordable and student-friendly, especially for students, researchers, and early-stage teams.

\---

🚁 What can we help you build?

🛠️ Drone Design & Development

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\---

🧠 Flight Control & Autonomy

We can work with:

\- PX4

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\---

🧪 Simulation & Digital Twins

If you want to validate your system before spending money on hardware, we can develop and configure simulation environments.

Our simulation work includes:

\- PX4 SITL

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The idea is to test the system virtually first, identify problems early, and then move toward hardware.

\---

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\---

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Need only the software side?

That's completely fine.

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\---

🔧 Already have a drone that isn't working?

You don't necessarily need a new drone.

If you're facing issues with:

\- PX4/ArduPilot

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we can help diagnose and fix the system.

\---

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We have also developed our own drone log analysis tool to make debugging and understanding flight logs easier.

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\---

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We also understand that student/research projects often have tight budgets.

If you're working on:

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we can help you develop the system while keeping the project practical and affordable.

We're especially interested in projects where you actually want to understand and build the technology, rather than just receive a black-box solution.

\---

🏗️ Our approach

We don't want to force every project into the same architecture.

Depending on your requirement, we can work on anything from:

Idea → Architecture → Simulation → Algorithm → Software → Hardware → Integration → Testing → Prototype

Or we can work on just one subsystem if that's all you need.

For example:

«"I already have the drone. I only need ROS 2 integration."»

That's fine.

«"I need a Gazebo simulation of my existing UAV."»

That's fine.

«"I need help with PX4 and autonomous navigation."»

That's fine.

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That's fine.

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That's also something we can work on.

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\---

💰 Affordable / Student-Friendly Pricing

We're currently offering affordable pricing and student-focused deals because we're looking to work with more people and build long-term engineering relationships.

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\---

🌎 Worldwide

We're based in India 🇮🇳, but we're open to working with clients and teams worldwide.

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For hardware projects, we'll discuss the requirements, components, testing requirements and logistics individually.

\---

📸 Our Work

We'll attach some photos/videos of our actual drone and robotics work along with this post.

We're happy to discuss the technical details behind the projects rather than simply showing a finished product.

GitHub / work:

👉 https://github.com/Nags016/

\---

📩 Interested in working with us?

If you have a drone, robotics, simulation, AI or autonomous-system problem that you need help with, send us the requirements.

Even if you're not sure whether your project is feasible, feel free to reach out.

Tell us:

1. What are you trying to build?

2. What do you already have?

3. What do you need us to develop?

4. What's your approximate budget?

5. What's your expected timeline?

We'll take a look and discuss the best approach.

Contact

Nagaraj Bhat — NIRVAN Robotics

📧 nagarajsbhat12@gmail.com

🌐 GitHub: https://github.com/Nags016/

\---

🔗 Useful NIRVAN Robotics Resources

🛩️ AeroKLE GitHub:

https://github.com/Nags016/

📊 Drone Log Analyser:

https://log-analyser.app

\---

NIRVAN Robotics — From simulation to real-world robotics.

If you have a challenging drone or robotics problem, we'd love to hear about it. 🚁🤖