diff --git a/src/interface.rs b/src/interface.rs
index 8542ebc..2ad9c77 100644
--- a/src/interface.rs
+++ b/src/interface.rs
@@ -1,7 +1,14 @@
-use bus::{ActiveBus};
+use embedded_hal::digital::v2::OutputPin;
+use embedded_hal::spi::FullDuplex;
+use embedded_nal::Ipv4Addr;
+
+use crate::{MacAddress,Mode};
+
+use bus::{ActiveBus,FourWire,ActiveFourWire};
 use device::Device;
-use network::Network;
+use network::{Network,Manual};
 use core::cell::RefCell;
+use uninitialized_device::{UninitializedDevice,InitializeError};
 
 pub struct Interface<SpiBus: ActiveBus, NetworkImpl: Network> {
     pub device: RefCell<Device<SpiBus, NetworkImpl>>,
@@ -11,8 +18,19 @@ impl<SpiBus: ActiveBus, NetworkImpl: Network> Interface<SpiBus, NetworkImpl> {
     fn new(device: Device<SpiBus, NetworkImpl>) -> Self {
         Self { device: RefCell::new(device) }
     }
+
+    pub fn release(self) -> Device<SpiBus, NetworkImpl> {
+        self.device.into_inner()
+    }
 }
 
+impl<Spi: FullDuplex<u8>, ChipSelect: OutputPin> Interface<ActiveFourWire<Spi, ChipSelect>, Manual> {
+    pub fn setup(spi: Spi, cs: ChipSelect, mac: MacAddress, ip: Ipv4Addr) -> Result<Self, InitializeError<<ActiveFourWire<Spi, ChipSelect> as ActiveBus>::Error>> {
+        Ok(UninitializedDevice::new(FourWire::new(cs).activate(spi)).initialize_manual(mac, ip, Mode::default())?.into_interface())
+    }
+}
+
+
 impl<SpiBus: ActiveBus, NetworkImpl: Network> From<Device<SpiBus, NetworkImpl>> for Interface<SpiBus, NetworkImpl> {
     fn from(device: Device<SpiBus, NetworkImpl>) -> Interface<SpiBus, NetworkImpl> {
         Interface::<SpiBus, NetworkImpl>::new(device)