@mpaulauskas were you able to resolve this issue? I’m having the same experience with a Model A 3.4, which has worked fine connected to an 8-port switch module in a Cisco 1941W for five years but doesn’t work on a 2960S. I have an A3 (wired) at work, which works on a 2960-X (with about 25m of structured cable) and also a 6509 (1m patch lead).

The interface comes up for ~15 seconds and then goes down and, as you observed, no MAC address appears in the CAM table. The Ethernet controller in the A seems to lock up at that point, since leaving it powered and connecting it back to the 1941 results in the interface still not coming up. Power-cycling the A returns it to normal operation.

Interestingly, if the A is booted whilst connected to the 1941 and I re-patch it to the 2960S it works fine. Booting it whilst not connected to anything results in a locked-up Ethernet controller after ~15 seconds, which requires power-cycling to rectify.

The A is the only thing left connected to the 1941, which is being retired since I have a new firewall, it’s old, doesn’t have enough ports, and also no longer need the ADSL capability. I have a wireless A3 at home, as well, so I may just end up retiring the Model A.

You can also try any of the 48V to 12V 802.3af/at adapters on eBay – such as those found here: https://www.ebay.com.au/sch/m.html?_ssn=horizon_electronic&_nkw=poe+12v You’ll need one with a 5.5×2.1mm barrel jack.
This one gives you drop-downs for voltage and plug and the description says 5.5×2.1mm: https://www.ebay.com.au/itm/282213516881 Not my ad, no connection to seller, etc.

I’ve used a similar one on my old Model A for years and will likely use one very soon for my A3, when I find somewhere at work that I can put it.

In other words, how can I look into the past data without the map returning quickly to the current location of the device?

That’s easy – deselect the “Automated refresh” box 🙂

I can eliminate GPS status as being a contributor to the issue I’ve been having with the SD card going offline; so that leaves:

• it connects to wireless (after not being connected)
• the screen is on (possible factor)
• being on the Settings screen (possible factor)

I’ve had five different types of GPS antennas (plus a random antenna that one of the sellers included) sitting on my desk for a few days now, see attached, but still no details about how to take the model-D apart without damaging the screen/cable or possibly sensitive components; @radhoo can you please supply this information?

–edit–
I guess the forum just drops images that are too large, without warning…
It also seems that referencing someone using @ no longer links to them.
While I’m on it, why is quoted text so large? And is it possible to enable some sort of post preview? The text editor for posting it pretty ordinary, so it can be a surprise as to what the resulting post might look like.

Ok, connecting to power isn’t related; so that leaves:

• it regains GPS lock (after having previously lost it, or losing it as/whilst it connects to wireless)
• it connects to wireless (after not being connected)
• the screen is on (possible factor)

The connector was soldered after it was installed.

That’s going to complicate things, then.

Because I had some excellent results with the small antenna, and considering it for the next design update, in order to get rid of the external plastic holder, or at least replace it for something more comapct.

Oh, I see. Perhaps I’ll try both then. Either way, given the amazing shipping times and limited shipping options from China, it will be at least 2-4 weeks until I can try anything. In the meantime, could you please provide instructions for disassembly, so that I can have a go at mounting the small antenna inside the model D? In particular, disconnecting and reconnecting the screen; as well identifying any items that are particularly fragile or for which special care must be taken.

I have somehow managed to reassemble it such that the GPS is working quite well but the cover is loose, so I’m not expecting that to last.

Did it still have power? I didn’t consider that long sync sessions will waste all battery, this is on the list for the new firmware too.

It had been connected to power for nearly 24 hours at that point, as I didn’t go out anywhere on Sunday. I almost always sync offline data when charging now, regardless. When I couldn’t wake it up, the power button also didn’t work, which led me to the belief that it had frozen/locked-up – I had to press the reset button and after that the power button was able to be used to power it up.

@radhoo it was showing 10 satellites in my car just now, so it doesn’t seem to be causing an issue. I might try correcting the orientation at some stage but I’m certainly in no rush.

Has there been a change to the offline sync functionality? I notice that it now displays raw data on the screen, rather than an encoded string (BASE64?), and uploads much more quickly – 20 sample in 30 seconds.

I think I worked out what the issue is/was with the GPS in my model D. Over the last couple of weeks the GPS antenna cover has become somewhat loose and detached many times; as a result of this it looks like now the antenna cable now has a small section of insulation missing and this may have been contacting the chassis of the D. I flipped the antenna over in the antenna cover, which routes the cable in a slightly different direction and I now receive 9-11 satellites in my car and 5-9 satellites where I charge it – at both of these locations it received zero satellites before I made this discovery.

I was planning to flip the antenna over, when I discovered this issue, because I found that, whilst reception was terrible standing up, it would actually receive a GPS lock when laying on its front – which made little sense. After having rerouted the cable, orientation now makes little difference to the number of satellites received (maybe 1-2 less/more).

Looking at the stats, it took around 16 hours and 15 minutes to upload the 9100 samples from this past weekend (it finished at ~04:43).

I hope something can be done about the offline sync performance. On each of the last two work days I haven’t been able to upload live, which means that I’ve had 2840 and 3092 samples to upload by the time I arrived home; the 2840 samples took 5 hours and 20 minutes to upload last night, so I’m guessing that it’s going to take nearly 5 hours and 45 minutes tonight with a corresponding gap in samples. It actually started phantom-uploading yesterday (uploading quickly but not actually uploading at all), however poking the reset button and trying again after powering back up saw things happen correctly; fortunately, in this case, interrupting the upload caused it to start again and not lose any samples.

Radiation graph for yesterday attached, showing the sample gap from 17:20-22:40.