This is where it gets weird. My OWBUS section is as follows :

[OWBUS_1]
owbus = /dev/i2c-1 --i2c=/dev/i2c-1:ALL ; Scanned bus (--i2c=/dev/i2c-1:ALL or localhost:2122 or 'u' for USB dongle)
interval = 3 ; [s] Default sensor reading
scan_interval = 300

That means the scan is 300 miliseconds, correct? I only have one sensor connected, but the Evok web interface still shows values from two sensors...looks like it stopped updating after first read. Any ideas ?

Thanks for the tip, this Rest call works for me. Perhaps it is good idea to include it to the API docs (https://evok-1.api-docs.io/1.01/) I couldn't find any note about the "sensor" usage there.
I use the same hub (athough got it elsewhere) think I got the topology right, have three sensors connected, and only can see two of them. Will try to check if one of them is not faulty.

Trying to read the values from DS18B20 temperature sensors. When I connect single sensor, I can get the value in the UniPi Control panel, it is listed in the REST API (when I do the rest/all call) but I am unable to figure out the request to get just single value. I tried many variants, tried to follow schema /rest/ai/{circuit} mentioned in the documentation, but all I can get is the 500 internal error. What is the correct rest call to get this value?
Another problem I face is that if I connect 1Wire hub, I can see just the same single sensor, while others are invisible. I am using the correct topology. Any idea what could go wrong there ? How often is the 1Wire bus scanned for changes?
The third issue is that I would like to connect a different kind of sensor, which is not listed in the list of supported 1Wire devices...wouldn't it be possible to add a support of any 1Wire device and just pass the raw data through the interface? Thanks.

I also noticed that I can't stop Evok service the way it is described in the Github (debugging section). I get "Failed to stop evok.service: The name org.freedesktop.PolicyKit1 was not provided by any .service files" - does this mean that Evok was not properly installed ?

On top of that, I have the log file full of the following error :

2017-11-07 23:10:21,222 - evok - ERROR - 'NoneType' object has no attribute 'do_scan'
Traceback (most recent call last):
File "/opt/evok/neuron.py", line 217, in scan_boards
yield self.modbus_cache_map.do_scan()

I got Neuron unit and try to bring it to life, but I got stuck at the moment when I installed Evok on it. It seems to work, there are no conflicts, but any call, such as http://my_address/rest/all ends in "{"status": "error", "message": "Internal Server Error", "code": 500}" reply. Not sure what could go wrong, and the documentation gives me any hints. Anybody has any idea what could be the reason for this ? Thanks.