Thanks to you all ...

Contacted the energy-transport-company (Liander) and they say "It takes 10 days". They have to activate and configure the Slimme meter first

gordonb3 wrote: Thursday 13 December 2018 21:00 ... give it some time ...

"Slimme meter" was installed 7 December 2018, so almost a week ago.
You think I should give it some more time?

P1 telegram

1-3:0.2.8(50)
0-0:1.0.0(181213174823W)
0-0:96.1.1(4530303531303034323935393831343138)
1-0:1.8.1(000044.725*kWh)
1-0:1.8.2(000054.220*kWh)
1-0:2.8.1(000000.000*kWh)
1-0:2.8.2(000000.000*kWh)
0-0:96.14.0(0002)
1-0:1.7.0(00.657*kW)
1-0:2.7.0(00.000*kW)
0-0:96.7.21(00014)
0-0:96.7.9(00003 ...

Just got a slimme meter and so I ordered the P1 cable to get into " Domotics " with Domoticz .
Installed Domoticz on my Synology DS216jplay and all went (almost) well.

Log:
2018-12-12 17:51:31.938 Status: P1 Smart Meter: Using serial port: /dev/ttyUSB0
2018-12-12 17:51:32.786 Status: P1 Smart Meter ...