use std::boxed::Box; use std::error::Error; use blinkrs::{Blinkers, Message}; fn main() -> Result<(), Box<dyn Error>> { let blinkers: Blinkers = match Blinkers::new() { Ok(b) => b, Err(_e) => { println!("unable to find device"); return Ok(()) }, }; blinkers.send(Message::from("red"))?; blinkers.send(Message::from("off"))?; Ok(()) }