So well, one connectivity problem is solved: the connection to WiFi is established.
The internal antenna of Model D does not allow to be more than few meters away from the access point.
Now the device is placed around 1meter away from the access point.

But still, the upload of the measured data is often stopping through the day.
Whilst the unit indicates it is connected to the hotspot, the webpage says the device is offline.

Through the debug menu it is possible to re-establish the connection.
Now, sometimes it is possible to upload the offline data, sometimes – even if for few hours there was no data update,
the SYNC menu says there is no offline data available for upload.
Yesterday I did upload over 3000 datasets but I could not see this reflected on the webpage.
It would be good if the webpage would mark those data, which has been uploaded through SYNC menu.
In this way users could become an indication, that the SYNCed data is not lost.
this is especially important due to the fact, that the device erases the offline data after the upload.
Maybe it would be better to let erase it first after the webpage confirms the reception.

Greets
Damian

I could offer a section on the dashboard, where model D users could manually drop their CSV files (perhaps in a zip file, all together) and the server would identify the missing data and add it to the DB. Is this something any of you would like to use?

Absolutely! I spent a little over 24 hours away from home, so I have over 9100 samples to sync and that will likely take 15+ hours – hopefully it will be done by the time I need to leave for work tomorrow.
I’m not sure how the offline sync works now but couldn’t the model D itself upload a zip file (or even a simple tar file) of CSVs for offline data? It seems like it should be able to upload the 1MB of data for the 9100 samples much faster that way.

With regards to GPS antennas, I’ll look into other options. Do you have the part number or specs for the current antennas or know what the gain is?

I’ve attached some photos of the VHB tape that I used as padding. Again, you don’t need to use VHB tape and, in fact, it’s probably an expensive way of doing it, if you don’t already have it lying around – any foam tape about 1mm thick should do.

I’ve also attached some photos of the reoriented GPS antenna and cable. I’m hoping that I’m not going to regret doing this now, because it took ages to finally get a satellite lock after I reassembled it; so hopefully I haven’t made it worse in the process.

@Kurt, by default, the foil side faces the model D chassis. However orientation doesn’t seem to have much effect.

Ok the bip disapear after I connect to the computer…
The GPS wont find any satellitess

Hello,

Having only incorrect temperature, humidity and pressure readings from my Model D, I was resigned to using it only for air quality and radiation measurement.

Currently, my area is experiencing the worst air quality ever
recorded (due to thick smnoke from forest fires). Visibility is down to 1 km and particulates are falling on my property but my Model D says air quality is normal.

I guess I will just use it to measure radiation. (After I test it against a known source to see if it actually can do it).

@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.