How to fix the phase wire in the CT, since the phase wire is much thinner than the hole in the current transformer ...

What is the maximum current transformer can be used for smart-MAC D103? Let's say there is a transformer on the 1000A with secondary winding 1A, will it work correctly with the device?

If only external network home wifi is still available-would like to see D-103-12, and that no external network.

The documentation stated that the smart MAC D105 contact 4 allows to connect 5 temperature sensors type DS18x20 or one
temperature and humidity sensor DHT22

How to do it. As far as I can see on sensors-e.g. Sealed masterkitovskij temperature sensor DS18B20

• 1-wire interface
  
• Red wire U Pete.
• Black wire GND
• Yellow wire Data

but it is not clear where any wires, and what to do for example with second or third sensor.

I just configured the device.

I enabled mqtt server config wit username and password.

Unfortunately in mqtt logs I cannot see the username from the smart-mac but just:

1557525454: New connection from 10.x.xx.xxx on port 1883.
1557525454: Sending CONNACK to 10x.xx.xxx (0, 5)
1557525454: Socket error on client , disconnecting.