Hi Matej,

Right now, that is not possible yet. It makes no sense, since for the first setup you cannot use an AP (it is not setup yet) you need to use your Wifi phone or tablet to connect and setup. These devices usually have no DHCP server. Thats why the Smoggie has a fixed 192.168.4.1 address.
After setup, since you usually use an AP (access point, Wifi router) to connect it to the internet, and the Smoggie uses DHCP, you can assign any IP you want on the DHCP-Server.
My Smoogie is configured that way and it works fine.

HTH,
Wolferl

Hi Matej,

It would help to know which kind of unit you are asking about…

Cheers,
Wolferl

Hi Aida,

That YT video is bullsh*t. Talking about radiation while displaying air pollution values 🙁
That 1000µg/m3 unit at Evora is definitely a defective unit, other units at the same spot (!) show low values.
There are some units in Europe showing high radiation values, but these also seem to be defective.
Eg. KIT1 unit 13000212 in Italy:
https://www.uradmonitor.com/?open=13000212&sensor=cpm
It shows very fluctuating high voltage values, which leads to wrong counts.

We really need to have some means to inform these users to keep the map clean. I think most users aren’t even aware that their units are sending bad values.

@Radu, any ideas or plans on that?

Cheers,
Wolferl

Hi Jank,

Can you test another power supply? There were several case reports with all sorts of weird behaviour of units because of bad power supplies.

Cheers,
Wolferl

Hi Paul,

It would help if you tell us the ID of at least one of the affected units…

Cheers,
Wolferl

My Smoggie does the same thing. I’d really like to remove that default Wifi network when the Smoggie is connected to an Wifi access point.
Radu, any ideas?

Cheers,
Wolferl

Hi folks,

Since I had my KIT1 apart, I took some measurements with the scope for comparison.
The yellow curve (lower trace, 2 volts per division vertical, 20µs per division horizontal) is the PWM output of the MCU. We see it is running at about 50% duty cycle, which is good.
The green curve (upper trace, 1 volt per division) is probed at the cathode of diode D7. We see some ringing when the current in the inductor is turned off.
That’s normal. HV is 380 volts (displayed).
If you have no ringing, you have no high voltage spikes. Loading the collector of the MPSA42 with a 10Mohms probe completely kills the HV (duty goes up to 90% which is the maximum).
If you probe there, be careful, there are 200 volts peaks present! Do not kill your scope 🙂

I have the original parts for transistors and inductors as the kit came from factory.

The only thing I modified are:
R3 is 47Mohms instead of 10MOhms
R4 is 220kohms instead of 47kohms
That yields the same divider ration of 213.
These modifications creates less load on the high voltage and reduced current consumption dramatically, plus reduces stress on the parts.

Cheers,
Wolferl