We want to leave a clear breadcrumb trail for users.
If there are no durations in range when it comes time to write an image, we should leave an empty image behind (or, something) when we encounter the situation where everything is filtered out (or no wifi devices were ever found).
(Imported from https://github.com/cantsin/imls-pi-stack/issues/12)
We want to leave a clear breadcrumb trail for users.
If there are no durations in range when it comes time to write an image, we should leave an empty image behind (or, something) when we encounter the situation where everything is filtered out (or no wifi devices were ever found).