# Chang MAVLINK\_SYS\_ID and now when I plug in my Pixhawk 5 it doesn't show

**URL:** <https://discuss.px4.io/t/chang-mavlink-sys-id-and-now-when-i-plug-in-my-pixhawk-5-it-doesnt-show/25742>\
**Category:** Using QGroundControl\
**Created:** [January 9, 2022, 4:59pm UTC](https://discuss.px4.io/t/chang-mavlink-sys-id-and-now-when-i-plug-in-my-pixhawk-5-it-doesnt-show/25742 "2022-01-09T16:59:51Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![wildman\_18](https://discuss.px4.io/user_avatar/discuss.px4.io/wildman_18/32/5685_2.png) [@wildman\_18](https://discuss.px4.io/u/wildman_18)\
**Post date:** [January 9, 2022, 4:59pm UTC](https://discuss.px4.io/t/chang-mavlink-sys-id-and-now-when-i-plug-in-my-pixhawk-5-it-doesnt-show/25742/1 "2022-01-09T16:59:51Z")

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As the title says. I changed my MAVLINK\_Sys\_ID in settings from 1 to 2. Now when I plug in my Pixhawk5 with PX4 it doesn’t connect. It will let me update the firmware. Any thoughts?

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**Author:** ![Christian-Born](https://discuss.px4.io/user_avatar/discuss.px4.io/christian-born/32/9410_2.png) [@Christian-Born](https://discuss.px4.io/u/Christian-Born)\
**Post date:** [January 12, 2022, 8:50am UTC](https://discuss.px4.io/t/chang-mavlink-sys-id-and-now-when-i-plug-in-my-pixhawk-5-it-doesnt-show/25742/2 "2022-01-12T08:50:21Z")

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Use Mission Planner and go to “full parameter tree” and set it back to 1.  
cheers

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**Author:** ![wildman\_18](https://discuss.px4.io/user_avatar/discuss.px4.io/wildman_18/32/5685_2.png) [@wildman\_18](https://discuss.px4.io/u/wildman_18)\
**Post date:** [January 15, 2022, 3:20pm UTC](https://discuss.px4.io/t/chang-mavlink-sys-id-and-now-when-i-plug-in-my-pixhawk-5-it-doesnt-show/25742/3 "2022-01-15T15:20:29Z")

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Thank you, that solved my issue.