# QGroundControl enable hardware safety switch **URL:** \ **Category:** PX4 Autopilot\ **Created:** [September 29, 2021, 9:23am UTC](https://discuss.px4.io/t/qgroundcontrol-enable-hardware-safety-switch/24369 "2021-09-29T09:23:57Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![drone\_pilot](https://discuss.px4.io/letter_avatar_proxy/v4/letter/d/45deac/32.png) [@drone\_pilot](https://discuss.px4.io/u/drone_pilot)\ **Post date:** [September 29, 2021, 9:23am UTC](https://discuss.px4.io/t/qgroundcontrol-enable-hardware-safety-switch/24369/1 "2021-09-29T09:23:57Z")
Hi all, I am a newbie with PX4 and drones in general. I have a quad frame, with Pixhawk flight controller. Initially I was using Mission Planner and after setting up the flight controller I would take it out to fly. I would press the hardware safety switch which came with the flight controller, and arm the drone while moving throttle stick in bottom-right position on my RC. This would arm the drone and motors will start spinning. Now I am trying the same with QGroundControl but not able to arm. I see that it only gets armed/disarmed if the flight controller is connected to QGC. Even pressing the hardware safety switch won’t do anything if drone is not connected to QGC. I have setup aux arm channel and a switch on my RC as well. But it only works if the drone is connected to QGC, otherwise I see red light blinking thrice on the flight controller. My questions are these: - Is it the case that I need to keep drone and QGC connected, via say a telemetry device in order to arm/disarm it? I do not have a telemetry module. - If not, what is the way to arm/disarm the drone? I think there are some parameters to set but I am not able to find them. Thanks, SP. ---
**Author:** ![ecksframe\_flygfoto](https://discuss.px4.io/user_avatar/discuss.px4.io/ecksframe_flygfoto/32/3935_2.png) [@ecksframe\_flygfoto](https://discuss.px4.io/u/ecksframe_flygfoto)\ **Post date:** [September 29, 2021, 11:12am UTC](https://discuss.px4.io/t/qgroundcontrol-enable-hardware-safety-switch/24369/2 "2021-09-29T11:12:34Z")
we use one of the parameters to disable the safety switch. i cant remember which one exactly but go to parameters and type in 22027 in the search box. then change the parameter from whatever it is to 22027 to disable it. ---
**Author:** ![drone\_pilot](https://discuss.px4.io/letter_avatar_proxy/v4/letter/d/45deac/32.png) [@drone\_pilot](https://discuss.px4.io/u/drone_pilot)\ **Post date:** [September 30, 2021, 10:43am UTC](https://discuss.px4.io/t/qgroundcontrol-enable-hardware-safety-switch/24369/3 "2021-09-30T10:43:03Z")
> [@ecksframe\_flygfoto](#): > > 22027 Hi, I tried to do what you said and also referred to what this page says about the parameter configuration: [Redirecting to latest version of document (main)](https://docs.px4.io/master/en/advanced_config/prearm_arm_disarm.html) What is happening: when I disconnect my drone from QGC, I am not at all able to arm it. I have a switch assigned to my RC to arm the drone. When I press the switch of RC the flight controller shows red light blinking thrice. **What I want to do is this: enable hardware safety switch on the flight controller and then arm/disarm the drone using a switch on my RC.** This is very easily done using Mission Planner, in fact it seems to be the default behavior there. **EDIT** Okay I am able to engage the safety switch now. Question then remains: **Does my drone have to be connected to QGC to arm/disarm via USB/telemetry module?** As I am not able to arm the drone if it is not connected with QGC. At the moment I do not have a telemetry module. Thanks, SP. ---
**Author:** ![Mohamed\_Fathallah](https://discuss.px4.io/user_avatar/discuss.px4.io/mohamed_fathallah/32/18220_2.png) [@Mohamed\_Fathallah](https://discuss.px4.io/u/Mohamed_Fathallah)\ **Post date:** [April 4, 2025, 8:42am UTC](https://discuss.px4.io/t/qgroundcontrol-enable-hardware-safety-switch/24369/4 "2025-04-04T08:42:36Z")
i’m dealing with the exact same problem, did you please solve it? If so can you please help me do that too?