Community Forum

Critical: Prearm: GPS and AHRS differ by 33m

(FRED) #1

Hello together,
I have an Octo Quad X Copter with Emlid Edge FC and a Reach M + module, tried today with the new Copter to fly and keep getting this error message.
What can this be and how can you eliminate the error?

(Tatiana Andreeva) #3

Hi @rcdevil,

Could you post the hardware setup photos, please?

(Dmitriy Ershov) #4

Hi Fred,

Did you manage to resolve this issue? Will you be able to post hardware setup photos?

(FRED) #5

you mean a photo from my copter?

(FRED) #6

do you mean a photo of my copter or a photo of the settings of QGroundcontrol software?

(Tatiana Andreeva) #7

Hi Fred,

I mean photos of your copter.

(FRED) #8

hi Dmitriy, i´m working on it, actually no solution to fix or to localize this error.

(FRED) #9

Hi Tatiana,
here are the photos.
Thank you.

(Tatiana Andreeva) #10

Hi Fred,

Which material is used for antenna ground plane?

I’d also recommend placing the radio antenna and Wi-Fi module in different parts of the drone.

(FRED) #11

the ground plane of the antenna is a round PCB plate with copper coating, with 70mm diameter.

(Tatiana Andreeva) #12


The copper coating should be on the side where the antenna is placed. Please make sure it’s so.