I have nearly the exact same observations and criticisms that Scott in post #4643 . I love the device don’t get me wrong! Radu it’s a great device. However for a R2 maby put the sensors on the 1 or 2 sides. One issue I have is as previously mentioned how to hold/set the device. If you put it one way for air then GPS drops out, if you set it for GPS+Radiation you block the air.

I have noticed that the delay in input is annoying and so far I don’t know the pattern however I did notice if I turn off wifi, gps and activate mute, that the input lag reduces a bit. I do have issue with my USB port cables don’t firmly seat due to the PCB sliding in the case. Likewise for the power button is a tad deep but I actually like this because it prevent accidental activation. Finally the SD card is actually unreachable without tools. I just noticed Radu’s tips on adding something to keep the PCB from floating in the case and will give that a go, might fix the USB cable issue as well.

Critically my last 3 trips have not shown up online. and I made sure to sync my data and it says “deleting file” etc… so not sure where the data is but I took a trip around my town, cruise ships running their equipment (PM 2.5 samples) around my hospital (Radiation etc) then I took it to my office and hit it with the X-Ray head. I love that the alarm was immediate, activating before the x-ray system finished its cycle (sub 1 second). Regardless of display the device alerted to the high dose (tested several times). These trips/data do not appear online for some reason. Had GPS on and locked until I went inside and my phone tethered the entire time with typical cell tower handoff and such so I am sure there was coverage dropouts at time.

While driving around occasionally behind a bus or big truck I would get what I suspect is an air quality alert (likely PM 2.5) however I couldn’t tell and I was hoping to see the samples online but again some data didn’t appear to make it to the site for some reason. Having a way to “tag” or mark an interesting moment would be neat.

Overall I like the device and hope that with this sort of feedback that should there be a Rev 2 or firmware changes in the future that we can fix some of these issues. Sounds like firmware will improve as time goes on. I would really like the option of keeping my screen on. I used my portable battery to power the thing and would love to use it with the screen on more. Maybe have the geiger click a separate item you can mute or make louder etc. Our beaches got a lot of debris from the tsunami that caused Fukushima so having a portable device is really nice, not sure what I might find. The Model D didn’t like my BBQ when I lit it 🙂 gave me a nice warning from several feet away. One more addition would be localization options, timezone, MPH vs KPH, pressure, temp C vs F etc. Being in the states I am used to my backward ways.

Overall I love the device and its rough edges. I am very grateful you kept working at it rather than rushing something out. Even the way it is now I don’t see it as nonfunctional in any way just sub optimal in a few areas and personally I am willing to accept this especially after reading about the challenges you had to overcome to bring this to market and the great feedback/support you provide such as the tape/toothpicks.

Keep up the great work