▸       /* save the rms measure of voltage and current */
▸       em->rms_c = ((rms_in_c * CT_RATIO) / bur_resistor);
▸       em->rms_v = 230; /* I don't have the voltage probe yet */
▸       (void)rms_in_v;  /* workaround to silent the -Werror=unused-but-set-variable*/

▸       return 0;