[Bug] Preflight Fail: Strong magnetic interference

[chakloong883]

Describe the bug

When I execute roslaunch px4 posix_sitl.launch, the following warning appears:

WARN  [health_and_arming_checks] Preflight Fail: Strong magnetic interference

What are the possible solutions? Below is the complete log:

zelong@kemove-System-Product-Name:~/workspace/simulation/PX4-Autopilot$ roslaunch px4 posix_sitl.launch
... logging to /home/zelong/.ros/log/e46deedc-ce6d-11ef-962d-3b6c70f65b86/roslaunch-kemove-System-Product-Name-78468.log
Checking log directory for disk usage. This may take a while.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://kemove-System-Product-Name:42257/

SUMMARY
========

PARAMETERS
 * /gazebo/enable_ros_network: True
 * /rosdistro: noetic
 * /rosversion: 1.17.0
 * /use_sim_time: True

NODES
  /
    gazebo (gazebo_ros/gzserver)
    gazebo_gui (gazebo_ros/gzclient)
    sitl (px4/px4)
    vehicle_spawn_kemove_System_Product_Name_78468_2572557572083514136 (gazebo_ros/spawn_model)

auto-starting new master
process[master]: started with pid [78507]
ROS_MASTER_URI=http://localhost:11311

setting /run_id to e46deedc-ce6d-11ef-962d-3b6c70f65b86
process[rosout-1]: started with pid [78548]
started core service [/rosout]
process[sitl-2]: started with pid [78555]
process[gazebo-3]: started with pid [78565]

______  __   __    ___
| ___ \ \ \ / /   /   |
| |_/ /  \ V /   / /| |
|  __/   /   \  / /_| |
| |     / /^\ \ \___  |
\_|     \/   \/     |_/

px4 starting.

INFO  [px4] startup script: /bin/sh etc/init.d-posix/rcS 0
process[gazebo_gui-4]: started with pid [78573]
INFO  [init] found model autostart file as SYS_AUTOSTART=10015
INFO  [param] selected parameter default file parameters.bson
INFO  [param] importing from 'parameters.bson'
INFO  [parameters] BSON document size 662 bytes, decoded 662 bytes (INT32:20, FLOAT:12)
process[vehicle_spawn_kemove_System_Product_Name_78468_2572557572083514136-5]: started with pid [78585]
INFO  [param] selected parameter backup file parameters_backup.bson
INFO  [dataman] data manager file './dataman' size is 7872608 bytes
INFO  [init] PX4_SIM_HOSTNAME: localhost
INFO  [simulator_mavlink] Waiting for simulator to accept connection on TCP port 4560
[ INFO] [1736415685.731374097]: Finished loading Gazebo ROS API Plugin.
[ INFO] [1736415685.732004975]: waitForService: Service [/gazebo/set_physics_properties] has not been advertised, waiting...
[INFO] [1736415685.733088, 0.000000]: Loading model XML from file /home/zelong/workspace/simulation/PX4-Autopilot/Tools/simulation/gazebo-classic/si
tl_gazebo-classic/models/iris/iris.sdf
[INFO] [1736415685.734474, 0.000000]: Waiting for service /gazebo/spawn_sdf_model
[ INFO] [1736415685.761327478]: Finished loading Gazebo ROS API Plugin.
[ INFO] [1736415686.157863883, 0.016000000]: waitForService: Service [/gazebo/set_physics_properties] is now available.
[ INFO] [1736415686.166471055, 0.024000000]: Physics dynamic reconfigure ready.
[INFO] [1736415686.338027, 0.196000]: Calling service /gazebo/spawn_sdf_model
Warning [parser.cc:833] XML Attribute[version] in element[sdf] not defined in SDF, ignoring.
[INFO] [1736415686.586007, 0.380000]: Spawn status: SpawnModel: Successfully spawned entity
INFO  [simulator_mavlink] Simulator connected on TCP port 4560.
INFO  [lockstep_scheduler] setting initial absolute time to 392000 us
INFO  [commander] LED: open /dev/led0 failed (22)
INFO  [uxrce_dds_client] init UDP agent IP:127.0.0.1, port:8888
INFO  [mavlink] mode: Normal, data rate: 4000000 B/s on udp port 18570 remote port 14550
INFO  [mavlink] partner IP: 127.0.0.1
INFO  [mavlink] mode: Onboard, data rate: 4000000 B/s on udp port 14580 remote port 14540
INFO  [mavlink] mode: Onboard, data rate: 4000 B/s on udp port 14280 remote port 14030
INFO  [mavlink] mode: Gimbal, data rate: 400000 B/s on udp port 13030 remote port 13280
INFO  [logger] logger started (mode=all)
INFO  [logger] Start file log (type: full)
INFO  [logger] [logger] ./log/2025-01-09/09_41_26.ulg
INFO  [mavlink] MAVLink only on localhost (set param MAV_{i}_BROADCAST = 1 to enable network)
INFO  [mavlink] MAVLink only on localhost (set param MAV_{i}_BROADCAST = 1 to enable network)
INFO  [logger] Opened full log file: ./log/2025-01-09/09_41_26.ulg
INFO  [px4] Startup script returned successfully
pxh> INFO  [tone_alarm] home set
[vehicle_spawn_kemove_System_Product_Name_78468_2572557572083514136-5] process has finished cleanly
log file: /home/zelong/.ros/log/e46deedc-ce6d-11ef-962d-3b6c70f65b86/vehicle_spawn_kemove_System_Product_Name_78468_2572557572083514136-5*.log
WARN  [health_and_arming_checks] Preflight Fail: Strong magnetic interference
WARN  [health_and_arming_checks] Preflight Fail: Strong magnetic interference

To Reproduce

roslaunch px4 posix_sitl.launch 

Software Version

px4 : the latest
OS : Ubuntu Noetic
gazebo: 11.15.1