August 3, 2017 at 9:04 am #4720
if the data from the device is not lost, whilst it is shown as offline on the webpage, how I can upload the “missing” data to the webpage? I know, readings which are in time of the hard device reset (to restore the connection to the server) are lost.
DamianAugust 4, 2017 at 7:05 pm #4723
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.
DamianAugust 4, 2017 at 8:20 pm #4724
These are both excellent ideas! As I stated earlier, we will need some improvements to the sync mechanism, and these ideas could be useful there.
Regarding the CSV files, currently there is no automated way for uploading them, but 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? (That is until the automated SYNC is improved?)August 6, 2017 at 8:07 am #4734
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?August 8, 2017 at 10:21 am #4743
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).August 9, 2017 at 9:09 am #4744
@sjmcinness , can you insert a few pics to make it more easy to follow? Thanks!August 9, 2017 at 11:04 pm #4746
Can you post a picture of the correct side up for the GPS antenna. Mine also arrived with the plastic cover off and the GPS antenna out. The cover continued to come off periodically until I used a little glue to keep it on. I am wondering if it might be upside down. And what is the correct position of that piece of gold foil?
-KurtAugust 10, 2017 at 10:00 am #4747
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.
Attachments:August 10, 2017 at 12:43 pm #4753
I have just received my model D.
I was trying to set it up when it start buzzing and no way to stop it with a white screen.
Is it a reset button somewhere ?August 10, 2017 at 1:08 pm #4754
Ok the bip disapear after I connect to the computer…
The GPS wont find any satellitessAugust 10, 2017 at 3:54 pm #4755
Hi @ybm, here is the reset button: https://www.uradmonitor.com/topic/model-d-feedback/page/2/#post-4667
@sjmcinness not sure about this, the ceramic antenna should be facing up, but let me know what you find. Also try to get one of the tiny antennas , I think I gave you the link in the other message.
@kurt, the copper foil should be facing down, touching the aluminium enclosure.August 11, 2017 at 1:59 am #4759
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).August 11, 2017 at 6:26 am #4762
Hello Ron, please let your D unit run for more than 5 minutes, so I can have a chance to check the data. The PM2.5 values seem elevated already.August 11, 2017 at 7:47 am #4763
@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.August 13, 2017 at 11:56 am #4768
Well, I now do regret taking photos of the GPS antenna – as my model D now has no GPS reception at all. It was initially ok after reassembly but it started to become unreliable, and ultimately had sketchy reception, so I took the cover off and flipped the antenna back to the correct orientation (foil side down) and I don’t think it’s had a satellite lock ever since. Testing with a multimeter, there is a short in the cable; massaging and maneuvering the cable can resolve it but a small move is all it needs to return.
Does the connector fit through the hole or was the cable soldered onto the antenna after it was installed?
I think the antenna cable really needs its own hole and I think that hole also needs a grommet to protect the cable. I believe that reinstallation of the antenna cover, after coming off numerous times, is what has caused this failure; the peg on the cover has simply crushed the cable and also stripped some of the insulation.
@radhoo, I’m wondering why you’ve suggested changing the antenna over to one that has ~15dB of gain, versus the original which, as far as I can establish, probably has 28dB of gain. This page shows a number of different antennas, including what I believe is the same as the standard antenna. I’m considering this 32dB antenna.
At 13:14 today, my model D stopped uploading because it had frozen – which I think is a first for mine. I noticed at ~18:20, when I picked it up to have another go at the GPS antenna cable and couldn’t wake the display.
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