sonoff ultraslim 503 case
thingiverse
The Smallest Possible Enclosure for Sonoff Basic The smallest enclosure possible for the Sonoff basic, designed specifically to install the Sonoff basic in our home's 503 boxes. Although some specific fruits are too deep to allow installation of the Sonoff, Perl and box container interruptors and outlets should not have space issues. I personally installed them under the Bticino Matix series.
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