I’ve been diving into the world of custom app development for Homey, specifically focusing on creating a Weather Display app. While I’ve managed to get basic weather metrics like temperature, wind speed, and rain accumulation working using the built-in capabilities such as measure_temperature and measure_rain, I’ve hit a snag when trying to integrate rain measurements in inches.
Currently, my setup defaults to millimeters, but I need it to display in inches for consistency with other weather apps I use. I attempted to create a custom capability named measure_rain_in, but it didn’t work. I also tried measure_rain.in with no success. I’m not entirely sure if I’m approaching the sub-capability creation correctly.
Has anyone successfully created a custom capability for rain in inches? Any guidance or pointing me toward a more detailed Homey SDK documentation would be incredibly helpful. I’m eager to crack this and get my weather display perfectly calibrated! 
