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Thank you 
Ask RadioLink. Why not just use an external GPS module with a compass? Or use an external compass module like this:
The HW ID screen is more useful but you still donāt shown any compassās recognized on the Flight Controller. Location of that screen posted above. And use āSnipeā for a screen shot rather than a photo of the screen.
How to open ?
Ok i will try my best.
Thank you 
I already told you how to locate the HW ID screen. Thatās why I said āin the post aboveā.
BTW-Note the Lifecycle on the LSM303D. Obsolete.
Is it ok ???
And now my external is not healthy after reset all perameters.
Thank you
Is what OK? You have the external GPS compass module connected. So use it.
That RadioLink Pixhawk is even less capable that the Cheap Pixhawk 2.4.8ās. All the redundancy, and the compass, has been removed to cut cost I would assume. This is what a cheap Pixhawk should show for hardware (Compass 1 external). I hope you didnāt pay much money for that.
And I donāt know what QGC uses as reference to say āquestionableā. What are the actual offsets?
At Iām started i have a cheapest but some guys say the radio link is a big company and his remote is very very good even pixhawk is good ,
And Iām sell cheapest and buy this bad guy
Thank you
The offsets are good. Very low actually. Go fly it.
Are you sure sir ???
And QGC ? How to say itās bad ?
Ask in the QGC thread, I think this thread is done.
Means I donāt understand,
And tomorrow i will go to test this bad guy
Thank you soo much sir
Thank you
Sir I have old apn 2.8 , 2pcs can I remove and fit in pixhawk (compass) is it possible ?
Thank you
Thank you sir for very useful helping , i was successful flight on this day and surprising thing is stabilize mode = althold mode little bit 
And Iām sorry for yesterday Iām soo scary about my baby (pixhawk)
This is a today flight with configuration this parameters
RTL is not healthy.
BATT_ARM_VOLT,14.7
BATT_CRT_VOLT,14
BATT_LOW_VOLT,14.4
And these for a bit better tuning, you can safely change these right away:
ATC_THR_MIX_MAN,0.5
PSC_ACCZ_I,0.5
PSC_ACCZ_P,0.25
MOT_BAT_VOLT_MAX,16.8
MOT_BAT_VOLT_MIN,13.2
Iām guessing 9 inch props, these are optional, yours were close but could be better:
ATC_RAT_PIT_FLTD,23
ATC_RAT_PIT_FLTT,23
ATC_RAT_RLL_FLTD,23
ATC_RAT_RLL_FLTT,23
ATC_RAT_YAW_FLTT,23
INS_GYRO_FILTER,46
MOT_THST_EXPO,0.63
And also Thank you Shawn sir 
This is morning flight indoor and also try in outdoor but still rtl problem is there 
but I will check out why this happening.
Thank you
I have problem with Pixhawk and compass identification. I did find for solution, all times see this page, and, for one day, I hope this afirmation was correct, āmy pixhawk didnāt have compass tooā.
But, if you see the board, you will can find chip DB-5883-900X side by side of local marked in photos, then, have a compass chip !!! model is Three-Axis Digital Compass IC HMC5883L or QMC 5883L - (http://www.farnell.com/datasheets/1683374.pdf).
Different of specifications of Pixhawk Radio Link
thank you,
You add that sensor in your board ?
Answer is Yes , so can you show me how itās work ?
And what about stability ?
Thank you
I used this firmware and a compass appeared.
http://www.radiolink.com.cn/firmware/Pixhawk/Copter/
or Ardupilot firmware /Copter/stable-3.6.9/fmuv2
Notice about RadioLink PIXHAWK V4.0 Firmware Upgrade
https://radiolink.com.cn/doce/pixhawkv4firmware.html
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