A Shelly US customer needed longer CT leads on Shelly Pro 3EM. I cut one, soldered in an extra 12 feet of wire, and used Phase Calibration with an untouched CT as the reference to get the meter reading accurately again on 240 V split-phase service.
A doorbell chime only works if you can hear it. This project adds a Shelly 1 Gen4 between the button and the chime, so the doorbell still rings like it always has, and the lights in the house turn on at the same time. For someone with a hearing impairment, that means no more missed deliveries or visitors left standing at the door. An optional script flashes the lights several times.
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