The here+ rtk gps does not work with navio2

Navio / Edge Hardware
1

hi all,
I have tried here , here2 and here+. all of them work except the here+.
As soon I as connect it, ardupilot won’t start, and the baro test fails…

IMG_20201110_152516
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could it be a problem in the i2c communication ?
I would appreciate some help.

as you can see in the picture, I have tried two different navio with two different software and two different rasspberry pi 3 and 4. they all exhibit the same problem

3

Hi @diamondx,

Welcome to the community forum!

Please run i2cdetect -y 1 on each Navio2 and post the output here. Make sure that everything is disconnected from the I2C port.

4

hi, thanks you for your support.
find attached the output of the i2cdetect you request:

image

so a reminder about my problem:

  • the navio2 works fine with the stock GPS
  • the navio2 works fine with here and here2 GPS
  • the navio doesn’t work with the here+. Ardupilot doesn’t want to start. running emlidtool ardupilot will tell me that there is an issue with the baro.

Thanks again.
Ali

5

to add to that:

  • I tried two here+. both didn’t work.
  • my cables are fine, pinouts are fine. same cables work fine with here and here2.
    I’ve been “droning” for 3 years. playing with these toys is my daily job… I’m wondering if you guys have already made a here+ work with a navio. if so, I will go back and try to find the issue… but if they are not compatible. I will just not use it for now and look for another alternative.
    Thanks
6

anyone ?

7

Hi Ali,

Sorry for the delay.

Currently, I don’t see clear reasons for connection failure between Navio2 and Here+. If the barometer test on Navio2 fails only when Here+ is connected, it might have something to do with the receiver. Please check that the device works with other available hardware.

8

Ali,

Let me correct my previous comment a bit. I believe there is a contention on the I2C bus. It seems that the Here+ device may use the same address as Navio2’s barometer. If it’s so, it won’t be possible to integrate them.

10

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