Imports
- github.com/brian-armstrong/gpio
- github.com/funcube-dev/limedrv
- github.com/knadh/koanf
- github.com/knadh/koanf/parsers/toml
- github.com/knadh/koanf/providers/env
- github.com/knadh/koanf/providers/file
- github.com/knadh/koanf/providers/posflag
- github.com/spf13/pflag