Microhard failing to connect

evigdorchik

Hello, I think I have a question for @tom

We are using a voxl-flight with a microhard add-on board with a pDDL900 in the socket.

The symptoms we are seeing is the modem booting up correctly sometimes and after running dmesg we see errors related to wcd9335. It seems like a conflict with usb devices but we aren't sure.

Here is the dmesg for more information.
https://flyvoly-my.sharepoint.com/:t:/p/bgrocholsky/EfsK-HaEl8BKtn2yXtPQFoAByGDu8L2SYYkdEOCTN-Vz6A?e=I09nMp

Is this a known issue? Can you replicate this on your end? Is there a workaround?

Hope to hear from you soon,
Eli

modaltb

Hi @evigdorchik we'll try to replicate over here, thanks for the data. It's not something we've heard of yet but we'll see how things look on our rack. If you can provide what system image etc that could help us replicate.

There's a few folks out on holiday right now so responses are a little delayed.

evigdorchik

The system image is 3.3.0 with 0.5.0 voxl suite. Just downloaded and flashed the latest one from the developer resources page before this test.

evigdorchik

Hey @modaltb this seems to be an intermittent thing that stops working at inconsistent intervals. It seems like something triggering the ifconfig to be deactivated on eth0. We are currently testing it with dhcp disabled on the modems and commented out "dhcpcd eth0" in /etc/initscripts/setup_ethernet.sh

Let me know what you guys find. Maybe brainstorm anything that might cause an intermittent reset on eth0? Is seems to boot up correctly then die

Happy Holidays!

evigdorchik

Hello,
Any followup on this?

tom

@evigdorchik Finally got a chance to give this a look. I see the same dmesg errors that you're seeing but we believe those to be unrelated / not an issue. I am able to keep a Microhard connection going with no issue. It's probably worth messing with the Microhard modems' settings to see if you can come up with a resolution. We haven't tried with dhcp disabled so can't give any support there.

Viswanathan R

@tom Hi Tom ,

I am Using pMDDL 2450 Microhard module with DDL2450 Amplifier unit for long range data transmission. But when I set the maximum RF output 30dbm to the pMDDL2450 RF output, it shows only 20dbm in spectrum analyser.do you know how to increase the RF output either by hardware or software ?

tom

@Viswanathan-R Our Microhard add-on boards are purely Microhard -> ethernet adapters, that may be more of a question for Microhard themselves. The antennas that we ship with support multiple frequencies so if you have a specific frequency you are using you may get better performance with antennas that tailored to that specific frequency.