# Sentinel not arming in OFFBOARD mode

Source: https://forum.modalai.com/topic/2674/sentinel-not-arming-in-offboard-mode
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Posted: 2023-09-21 15:29:07 UTC by SMRazaRizvi
Replies: 1 · Views: 584

## SMRazaRizvi · 2023-09-21 15:29:07 UTC

I have a Sentinel drone with the latest VOXL SDK 1.0.

I am using MAVROS to control the drone. I can arm it in MANUAL mode, however, I am unable to arm my drone in OFFBOARD mode.

I am publishing a proof of life, by publishing a local goal pose onto the ROS topic `/mavros/setpoint_position/local `, and requesting a mode change using the service `/mavros/set_mode`. The drone successfully switches to the OFFBOARD mode but doesn't arm.

How can I solve this?

## Reply by Dawid Mościcki · 2024-01-25 20:48:38 UTC

@SMRazaRizvi in order to arm drone in offboard mode, px4 must be first able to arm in position mode. i would recommend checking if this drone arms in position mode (not manual)