# Starling 2 Max Ardupilot GPS

Source: https://forum.modalai.com/topic/5129/starling-2-max-ardupilot-gps
Category: Development Drones (https://forum.modalai.com/category/44/development-drones)
Tags: starling
Posted: 2026-03-24 03:58:01 UTC by wilkinsaf
Replies: 2 · Views: 1154

## wilkinsaf · 2026-03-24 03:58:01 UTC

We are seeing some oddness when it comes to running Ardupilot on the Starling 2 Max. 

We are unable to get really any GPS satellites, and the driver seems to be acting a bit weird. 

1. We are able to get this working fine on PX4  - we run this pretty consistently. So, doesn't point to wiring

2. We tried Arducopter 4.6.3, 4.7, and 4.8 - we had the best luck on 4.7. But, even on that version weird things happen - like GPS_RAW_INT showing up with a lat and lon, but showing no visible satellite: ![7b14326a-10f0-4b31-a47d-4e9253551acc-image.png](https://forum.modalai.com/assets/uploads/files/1774324528212-7b14326a-10f0-4b31-a47d-4e9253551acc-image.png) 

3. when indoors, only v_acc is updating...which feels odd: https://www.loom.com/share/3379c1aafcd74c95aa65e7f3af09a488

Any thoughts / ideas on where to look would be super. Thanks!

## Reply by wilkinsaf · 2026-03-24 05:05:01 UTC

@wilkinsaf 

I did the following and was able to get it

1. installed arducopter 4.7
2. disabled serial2_option for mavlink forward
3. configured compass
4. configured acceleromter
5. turned off GPS_AUTO_CONFIG
6. set SERIAL3_BAUD to 115200

https://www.loom.com/share/b96c3edd2286477ea294ddbd262dc31e

## Reply by wilkinsaf · 2026-04-10 15:58:06 UTC

Update fix

```
Replace defaults.parm with upstream version: https://github.com/ArduPilot/ardupilot/blob/ee1e4bbf74061760826b17464383d63c1a11924c/Tools/Frame_params/ModalAI/Starling2Max.parm
Rename Starling2Max.parm to defaults.parm in /data/APM
Edit SERIAL3_BAUD=9 (in defaults.parm)
Edit GPS1_TYPE=2 (in defaults.parm)
Remove *.stg files in /data/APM
Reboot and power off the voxl2 multiple times, checking the gps driver

```