Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4961769.

I've recently had a Landis+Gyr E470 smart meter fitted, but unfortunately it has not been able to connect to the network (bad signal inside) so I just built my own pulse LED sensor (based on Home Assistant Glow)

As I wanted to assemble the whole thing on top of the meter, I designed this harness to do it.

After printing, just take a small nail and manually puncture two holes side by side so you can fit the LDR wires through and then connect it to the ESP board.

Note: I know that a photodiode would be preferable, but I've been using an LDR with no issues at all, so that is why there's only 2 wires here.