Reading the raw data of the digital meter
The slimmemeter doesn't show you the actual raw data that the digital meter is sending.
To be able to read this data, a special cable is needed.
A so called P1 USB cable. For example https://webshop.cedel.nl/Slimme-meter-kabel-P1-naar-USB
When the cable is plugged in, a COM port is created by Windows where the data can be read from. The COM port can be determined via device manager.
For that a terminal program is needed. For example, putty can be used:
Enter the port and choose a baud rate (speed) of 115200.
That is all. When connected, the terminal will show all the data that is send by the digital meter.
See https://github.com/peno64/slimmemeter/blob/main/putty.log for a full example. Following print screen shows a part of it:
