In the Netherlands, Belgium, Luxembourg and Sweden Residential Smart Electricity Meters comply to DSMR (Dutch Smart Meter Requirements), also known as ‘Smart Meter’ or ‘P1 port’ which supports plain non encrypted telegrams and also encrypted telegrams as used in Luxembourg.

This hardware sends the data of you Residential Smart Meter to Home Assistant using a esphome component.

There are many designs of Home Assistant compatible DSMR interfaces available. Some commercial, some open source. Most of the open source designs are 'complicated' and/or hard to build by a regular consumer. As always we try to keep things simple, so we designed the SM01 to be easy to build and use only a few widely available components.

On top of that we designed to SM01 to optionally support your water meter using a simple inductive sensor and you could add a I2C (OLED) display as well.

Please check out our full project post at https://www.espthings.io/sm01