This cable has a built-in FT232RL chip, with which you can read almost all smart meters (with the DSMR-4.0.Interface). The RJ12 (6p6C) cable can be connected directly to the smart meter, so that it can be read with, for example, Domoticz or with a dedicated package such as P1 Monitor from ZTATZ. But there are of course many more options. The length of the cable is 1.80 meters.
Pay attention: This cable has an output of 3.3V and some smart meters need 5V, so the cable will not work on all meters.
Pinout