update examples

examples/basic/main.rs

@@ -2,15 +2,19 @@ use obd2::commands::Obd2DataRetrieval;
 
 use std::time;
 
-fn main() {
+fn main() -> Result<(), obd2::Error> {
     env_logger::init();
-    let mut device: obd2::Obd2<obd2::device::Elm327> = obd2::Obd2::default();
+    let mut device: obd2::Obd2<obd2::device::Elm327<obd2::device::FTDIDevice>> = obd2::Obd2::new(
+            obd2::device::Elm327::new(
+                    obd2::device::FTDIDevice::new()?
+                )?
+        )?;
 
     println!("VIN: {:?}", device.get_vin());
-    for s in device.get_service_1_pid_support_1().unwrap().iter() {
+    for s in device.get_service_1_pid_support_1()?.iter() {
         println!("PID support ($01-$20): {:08X}", s);
     }
-    for s in device.get_service_1_pid_support_2().unwrap().iter() {
+    for s in device.get_service_1_pid_support_2()?.iter() {
         println!("PID support ($21-$40): {:08X}", s);
     }
 
@@ -47,4 +51,6 @@ fn main() {
             device.get_throttle_position()
         );
     }
+
+    Ok(())
 }

src/lib.rs

@@ -6,14 +6,20 @@
 //!
 //! # Usage
 //! ```
-//! use obd2::{commands::Obd2DataRetrieval, device::Elm327, Obd2};
+//! use obd2::{commands::Obd2DataRetrieval, device::{Elm327, FTDIDevice}, Obd2};
 //!
 //! fn main() -> Result<(), obd2::Error> {
-//!     let mut device = Obd2::<Elm327>::default();
+//!     let mut device = Obd2::<Elm327::<FTDIDevice>>::new(Elm327::new(FTDIDevice::new()?)?)?;
 //!     println!("VIN: {}", device.get_vin()?);
 //!     Ok(())
 //! }
 //! ```
+//!
+//! alternatively, you could use a serial port provided by your operating system such as 
+//! /dev/ttyUSB0 on unix-like systems
+//! ```
+//! let mut device = Obd2::<Elm327::<SerialPort>>::new(Elm327::new(SerialPort::new("/dev/ttyUSB0")?)?)?;
+//! ```
 
 #![forbid(unsafe_code)]
 #![warn(missing_docs)]