# Starling is losing position in indoor flights

Source: https://forum.modalai.com/topic/3206/starling-is-losing-position-in-indoor-flights
Category: Development Drones (https://forum.modalai.com/category/44/development-drones)
Tags: starling
Posted: 2024-03-12 09:29:25 UTC by muhammadbilal1
Replies: 4 · Views: 1509

## muhammadbilal1 · 2024-03-12 09:29:25 UTC

Hi,
**Problem # 1:**
I am trying to fly the ModalAI [Starling](https://www.modalai.com/products/starling?variant=45182917738800) in "**Position**" flight mode, but it's continuously **losing it's position** while flying in "Position" mode and going to "**Altitude**" flight mode automatically.

**Problem # 2:**
I am experiencing **RC Loss** (see log # 2 below) while the drone is approx. 3 meters away from the drone.

Can you please tell us how to fix these issues and why these issues are appearing?
We just bought the drone last week.

Below given are the logs of the flights with problems:

**Log # 1 - Drone is losing position (invalid setpoints)**
https://review.px4.io/plot_app?log=c22fe72f-8dcf-45e5-a344-27fbc0513479

**Log # 2 - Drone is losing position and RC loss**
https://review.px4.io/plot_app?log=d347bebd-53b9-4cfb-94ca-7e34ee719b99

**Log # 3 - Drone is losing position (invalid setpoints)**
https://review.px4.io/plot_app?log=cc771087-2edd-4111-9cfa-f3004fe91c9e

**Log # 4 - Position Loss with Collision Prevention**
https://review.px4.io/plot_app?log=3b2a00d4-58c6-4af2-bf7c-e698b259a44f

**We need 100% stable indoor flights ASAP.**

![QGC.png](https://forum.modalai.com/assets/uploads/files/1710235748736-qgc.png)

![QGC_2.png](https://forum.modalai.com/assets/uploads/files/1710238416507-qgc_2.png)

## Reply by Moderator (ModalAI staff) · 2024-03-12 20:57:17 UTC

Hi, can you please review the [VIO troubleshooting guide](https://docs.modalai.com/flying-with-vio/#troubleshooting-vio) and see if you can capture the proper debugging data?

## Reply by muhammadbilal1 · 2024-03-19 18:35:10 UTC (in reply to Moderator)

@Moderator 
Any word on the "RC Loss" problem?

I am continuously experiencing the "RC Loss" problem, even from a few inches or feet.
This has happened so many times, even during the flight the connection to the RC is lost and done is on it's own and it land (fail safe).

**Log # 1:**
https://review.px4.io/plot_app?log=d347bebd-53b9-4cfb-94ca-7e34ee719b99

 **Log # 2:**
https://review.px4.io/plot_app?log=495b6910-01b4-4311-a4b7-89ba6c20fac9

**As you can see in the below pictures, the drone is connected with the laptop over WiFi, RC is ON and has enough power (3.9 V).**
**Camera preview is available on the laptop, and QGC shows a "Manual Control Lost" message on the screen.**
**I don't see the signals bar on the screen of the RC.**

![RC1.JPEG](https://forum.modalai.com/assets/uploads/files/1710873094536-rc1-resized.jpeg) 

![RC2.JPEG](https://forum.modalai.com/assets/uploads/files/1710873103752-rc2-resized.jpeg)

## Reply by Moderator (ModalAI staff) · 2024-03-19 23:32:16 UTC (in reply to muhammadbilal1)

@muhammadbilal1 those RC operate at 915MHz. Any chance you have interference in the area? Alternatively, maybe the wiring between the receiver and the VOXL 2 was manipulated or came loose?

## Reply by muhammadbilal1 · 2024-03-20 01:19:46 UTC (in reply to Moderator)

@Moderator As far as I can see, there is no interference in the area, I am working along for like 100's of meters. I don't have any such equipment in my premises which can interfere.

Physically, I checked the "915MHz ELRS Receiver" (BetaFPV Nano RX) and it's not lose. What else I can check?

Please help us fix all the issues, we are in agony since we started using this (Starling) kit.

**I have other open issues too.**
- [Starling gone rogue (uncontrollable) in Position flight mode](https://forum.modalai.com/topic/3237/starling-gone-rogue-uncontrollable-in-position-flight-mode)