Coming soon - New "mRo Location One" a CAN GPS sensor

MadRC · January 19, 2020, 10:11am

Very nice, will this be supporting the UAV CAN pre 1.0 that we are using today for the most part ?

You guys have clearly put a lot of effort into this one.

tegwin · January 20, 2020, 1:47pm

Very impressive.

If you make an f9p version I’d be very keen

pemase · February 4, 2020, 7:45am

Check the “mRo u-Blox ZED-F9 RTK L1/L2 GPS”

https://store.mrobotics.io/product-p/mr-m10020-a.htm

mRo u-Blox ZED-F9 RTK L1:L2 GPS Front

vosair · February 20, 2020, 1:28am

We got a couple Location One in for testing and it is by far the best GPS unit I’ve tested (we’ve tested 13 so far). It manages a 0.6 HDOP in our office, which is the best indoor HDOP I’ve ever seen

Dave84 · February 20, 2020, 6:05am

I’ve the same Gps module…its really very sensitive, and you don’t need spend minutes to aquire the gps signal. Outdoor the HDOP is really very low…the rm3100 mag help a lot specially if around your area you have few mag field…
Not all CAN Gps are the same… but this one is really the best option you can find.
Firmware can be also update using MP.

RomanD · February 20, 2020, 11:57am

Hi Guys,
Had two mRo Location one installed and after a long calibration process got this in the orientation:

Seems not aligned with the forward heading of the unit and flipped…any ideas?

Dave84 · February 20, 2020, 1:03pm

Can you attach pls the pics about how you mounted it?

Dave84 · February 20, 2020, 1:10pm

KitCAN node is awesome… I’ve already done three flights…, very accurate measurement in plus you have the baro and arm switch.
Baro reading is more accurate than the baro on the fc…with a very low light sensibility than the venerable ms5611

RomanD · February 20, 2020, 4:45pm

The front of the drone is aligned with the arrow on the mRo Location One unit

Dave84 · February 20, 2020, 6:23pm

Even there is the arm switch, it will not affect the external one you have… but it can help just in case you damage the external one or just in case it will not work properly…,

Dave84 · February 20, 2020, 6:27pm

Good day, during the calibration did you set the automatic learn off set?
i saw in your settings you have disabled the primary compass… leaving active the second and the third.
Which firmware version are you using?

RomanD · February 20, 2020, 6:32pm

Hi @Dave84,
I have disabled the automatic offset learn.
I’ve left only the two external mRo units active (one of them as primary).
I’m using V4.0.0.

Dave84 · February 20, 2020, 6:43pm

Pls just update your firmware to the last versione… just active all the compasses… enabled the automatically learn offset and calibrate it again

My unit after the calibration

RomanD · February 20, 2020, 6:52pm

Shouldn’t it work also without the internal compass?
regarding the Automatic offset learn - I’ve read that it’s functional only with COMPASS_LEARN = 3, which is InFlight learn - and I’m unable to pass the PreArm checks currently…
Regarding the latest FW version - are there any relevant fixes in 4.0.1/4.0.2?
Thanks!

Dave84 · February 20, 2020, 7:00pm

In 4.0.2 you will have the corrections about small bugs found on the previous version…

i will attach you a link so you can follow the previous versions and future developments…

github.com

ArduPilot/ardupilot/blob/master/ArduCopter/ReleaseNotes.txt

ArduPilot Copter Release Notes:
------------------------------------------------------------------
Copter 4.0.3-rc1 20-Feb-2020
Changes from 4.0.2
1) Bug Fixes:
    a) "RCInput: decoding" message watchdog reset when using MAVLink signing (Critical Fix)
    b) HeliQuad yaw control fix
    c) Do-Set-Servo commands can affect sprayer, gripper outputs
    d) BLHeli passthrough fix for H7 boards (CubeOrange, Holybro Durandal)
2) USB IDs updated for "composite" devices (fixes GCS<->autopilot connection issues for boards which present 2 USB ports)
3) RCOut banner helps confirm correct setup for pwm, oneshot, dshot 
4) ZigZag mode supports arming, takeoff and landing
------------------------------------------------------------------
Copter 4.0.2 11-Feb-2020
Changes from 4.0.2-rc4
1) MAVFTP stack size increased to 3k (fixes reboot when using MAVFTP)
------------------------------------------------------------------
Copter 4.0.2 11-Feb-2020 / 4.0.2-rc4 05-Feb-2020
Changes from 4.0.2-rc3
1) Bug Fixes:

This file has been truncated. show original

In my opinion better use the external compass coz the one inside can be affected by mag field noises

Dave84 · February 20, 2020, 7:14pm

Just let me know pls the results when you have performed a new calibration…

RomanD · February 20, 2020, 8:22pm

Will do, thanks @Dave84

RomanD · June 14, 2020, 8:42am

Hi Guys,
I’ve encountered a new issue with the latest mRo units - they don’t pass the calibration process.
Reviewing the different units using the UAVCAN GUI I’ve observed 3 different FW/SW versions:

Only the 1.0.d5729326 works fine. Any ideas?
Thanks

Dave84 · June 14, 2020, 1:11pm

Good day l, you have flash the correct firmware for the LocationOne? As now the firmware are board exclusive you need the correct version.
I’ve compiled the last firmware version… if you need i can attach you the binary file.
on which fc are you using it?

RomanD · June 14, 2020, 2:52pm

Hi @Dave84 - We have not flashed any of our Location One units. Which version are you using? (the 1.0.d5729326 seems the only one that works currently).
How do flash the units? Where do you get this version? is it mRo official?
We’re using mRo Z7 FC.
Roman