Little adapter to mount a D1 Mini (ESP 8266) directly onto the power meter
I used a 5mm Photo-transistor (BPW 40) to monitor my smart meter IR output

I used 12pcs 6mm x 1mm magnets from Amazon together with a DIN 125 M16 washer to increase the magnetic force. With that, the assembly can easily be clicked onto the power meter

For the software on the D1 I used this Tasmota-Version:
https://community.symcon.de/uploads/short-url/xwULd9Sr7CpLivakd2pUYdSEWIx.zip

from here: https://community.symcon.de/t/anleitung-um-digitale-zaehler-per-wlan-auszulesen-ohne-schreibkopf/51079/95
(comment from bjman in Nov 2020)

and store the values via MQTT on a InfluxDB on a Raspberry Pi

I included also Step and Solidworks-files, if you want to change something.

Have fun!
Sebastian

Anycubic

All-metal Mega

No

No

200

20% Triangle

no supports needed