# Drone can't arm

**URL:** <https://discuss.px4.io/t/drone-cant-arm/31743>\
**Category:** PX4 Autopilot\
**Created:** [April 15, 2023, 7:00pm UTC](https://discuss.px4.io/t/drone-cant-arm/31743 "2023-04-15T19:00:16Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Chienthan123](https://discuss.px4.io/user_avatar/discuss.px4.io/chienthan123/32/12131_2.png) [@Chienthan123](https://discuss.px4.io/u/Chienthan123)\
**Post date:** [April 15, 2023, 7:00pm UTC](https://discuss.px4.io/t/drone-cant-arm/31743/1 "2023-04-15T19:00:16Z")

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Hello, I have installed the Pixhawk firmware using QGC. Calibrated all sensors and everything. It arms perfectly when connected to the QGC via laptop MicroUSB cable. But when I disconnect the cable and try to arm it. It doesn’t arm the drone. Why is this and how to fix it. (Im using Pixhawk 6c, PM07 power module and Px4 firmware)

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**Author:** ![JulianOes](https://discuss.px4.io/user_avatar/discuss.px4.io/julianoes/32/30_2.png) [@JulianOes](https://discuss.px4.io/u/JulianOes)\
**Post date:** [April 15, 2023, 7:35pm UTC](https://discuss.px4.io/t/drone-cant-arm/31743/2 "2023-04-15T19:35:01Z")

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Do you have something like a SiK radio to see telemetry so that you see what is going on?

If not, I suggest that you set the param [SDLOG\_PROFILE](https://docs.px4.io/v1.13/en/advanced_config/parameter_reference.html#SDLOG_PROFILE) so that it logs from boot. Then you try to arm and after it hasn’t worked you check the logfile. There should be some message in there telling you the reason why it could not arm.

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**Author:** ![NithinKrishnan28](https://discuss.px4.io/user_avatar/discuss.px4.io/nithinkrishnan28/32/15409_2.png) [@NithinKrishnan28](https://discuss.px4.io/u/NithinKrishnan28)\
**Post date:** [February 15, 2024, 12:57pm UTC](https://discuss.px4.io/t/drone-cant-arm/31743/3 "2024-02-15T12:57:16Z")

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@Chienthan123  
Hello, even am facing the exact same problem as mentioned by you. The drone is getting armed when i connect using USB cable to laptop. But doesnt arm using the RC conroller. Were you able to solve the issue??  
If yes, please guide me through.  
Thanks for your time in advance…