Here3+ no GPS fix

Here GPS
1

Hello,
We have several new Here3+. Every of them has no GPS fix even after 3 hours outside (I see uavcan_equipment_gnss_Fix2 message gets with 5Hz, but data is zeros).
I also tried to connect to M8P-2 via u-center (like described in Here3+ manual) to load almanach, but there is no “passThrough” parameter in Here3+ params. When I try do update M8P-2 software (like described in Here3+ manual) in u-center, it gets an error " 0.3 WARNING: SW Version information seems corrupt! 0.3 ERROR: Could not get correct ROM size"…

Does somebody know the way to connect to M8P-2 in Here3+ (in particular to load almanach)?
And what is the possible reason of few new Here3+ deviced has no GPS fix in described situation?
And maybe I can somehow to connect the developer to get the product support?

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2

Hi Nikolai,can you please share a screenshot on your MP HUD?

3

Hi Mike, here it is:
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4

Can you re-flash Here3+ firmware with MP ?
What is your LED indication on Here3+?
Can you please check the relative parameters ?

5

-Can you re-flash Here3+ firmware with MP ?
In UAVCAN window i press Menu->Update, then I see “Download FW”, then “File send complete”. I don’t sure does it mean that update is OK ot not.

-What is your LED indication on Here3+?
Right after I connect Here3+ to CAN1 (Cube Orange), the LED became solid White (or light Blue), and the color is always stays the same. No blinking or color change at all.
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  • Can you please check the relative parameters ?
    Yes I checked all the parameters, actually they are the same like in our Cube Orange with Here3 (which works OK). But I think the parameters is the second step. First step is that I have to see uavcan_equipment_gnss_Fix2 message with data instead zeros. Or I’m wrong?
6

An additionally question: can I use this port pins (on the photo) for to connect to the M8P? Or what is the function of this port (I find nothing in the manual)?
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7

Yes, you can use ‘‘USB to TTL module’’ connect your here3+ to u-canter.
But the case is water proofed, so there water proof feature will be affected once open the case.

8

Thanks, could you please provide me pinout of this port to understand how to connect USB to TTL module?

9

Don’t you have this port pinout?

10

I will PM you.

1 Like
11

hello there i am also stuck with the same error how can i fix this please guide me with this.

12

Hi.
Unfortunately, nobody helped to solve the problem. I was really surprized that the developer has no real documentation and technical support. It’s like some toy, but not serious device.
If I solve the problem, I’ll let you know. And you please share me the info, if you’ll find the way to make here3+ alive.

4 Likes
13

I got the 3dfix gps but only able to connect with more then 5-6 satellite at a time. so i thought its the problem of firmware so i decided to update the ublox chip but thats not happning…

14

can you share me the pinouts too.

15

May I know your oerating environment ？
What is your LED indication on Here3+?
Can you do a swap test with another GPS unit ?

16
  1. i was operating gps on open ground though i was getting 5-6 Satellites.
  2. led is blinking in yellow color and when i arm it turns to solid green colour.
  3. i dont have another HERE 3+ gps for swap test.
17

Hi, could you tell me please, how did you try to update ublox chip? Like in user manual described?

18

yes i have done as it described in the user manual, but i cannot find the PassThrough parameter in UAVCAN of here3+
this is what they have shown parameter list on the user manual:
Screenshot (61)

and here is the parameter list of mine:
Screenshot (62)
Screenshot (63)

i cannot find the passthrough parameter in my list.

19

Yes, the same at my side.
Looks like the reason is in this note in the user manual:
" 4. HERE3 u-blox Chip Firmware Update

Here is 3 + U-Blox firmware update method will be released when a new firmware comes out for the M8P-2, the here3+ has the latest firmware at launch, and we will update here if a newer version comes out."

I think, this functionality just doesn’t implemented in Here3+…

1 Like
20

yes! but I am getting only 5-6 satellite at a time. i think its only getting connected to GPS satellites its not getting connected to GNSS or Bidoue Satellites. do you have any solution for that? there must be problem with GPS_GNSS config.