diff --git a/Cargo.lock b/Cargo.lock
index eb44971..346f9a4 100644
Binary files a/Cargo.lock and b/Cargo.lock differ
diff --git a/Cross.toml b/Cross.toml
new file mode 100644
index 0000000..2b8c82d
--- /dev/null
+++ b/Cross.toml
@@ -0,0 +1,5 @@
+[build]
+pre-build = [
+    "curl -Lo /usr/bin/yq https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64",
+    "chmod +x /usr/bin/yq"
+]
diff --git a/config/emgauwa-controller.pkl b/config/emgauwa-controller.pkl
index 272d03a..327c1bd 100644
--- a/config/emgauwa-controller.pkl
+++ b/config/emgauwa-controller.pkl
@@ -8,8 +8,8 @@ server {
 database = "sqlite://emgauwa-controller.sqlite"
 
 permissions {
-  user = read("env:USER")
-  group = read("env:USER")
+  user = "" // read("env:USER")
+  group = "" // read("env:USER")
 }
 
 logging {
@@ -20,37 +20,32 @@ logging {
 relays {
   new {
     driver = "gpio"
-    pin = 5
+    pin = 24
     inverted = true
   }
   new {
     driver = "gpio"
-    pin = 4
+    pin = 23
     inverted = true
   }
   new {
     driver = "gpio"
-    pin = 3
+    pin = 22
     inverted = true
   }
   new {
     driver = "gpio"
-    pin = 2
+    pin = 27
     inverted = true
   }
   new {
     driver = "gpio"
-    pin = 1
+    pin = 18
     inverted = true
   }
   new {
     driver = "gpio"
-    pin = 0
-    inverted = true
-  }
-  new {
-    driver = "gpio"
-    pin = 16
+    pin = 17
     inverted = true
   }
   new {
@@ -58,6 +53,11 @@ relays {
     pin = 15
     inverted = true
   }
+  new {
+    driver = "gpio"
+    pin = 14
+    inverted = true
+  }
   new {
     driver = "piface"
     pin = 1
diff --git a/config/emgauwa-core.pkl b/config/emgauwa-core.pkl
index 667b669..3e6caa4 100644
--- a/config/emgauwa-core.pkl
+++ b/config/emgauwa-core.pkl
@@ -8,8 +8,8 @@ server {
 database = "sqlite://emgauwa-core.sqlite"
 
 permissions {
-  user = read("env:USER")
-  group = read("env:USER")
+  user = "" // read("env:USER")
+  group = "" // read("env:USER")
 }
 
 logging {
diff --git a/emgauwa-controller/Cargo.toml b/emgauwa-controller/Cargo.toml
index 5a95670..4f31798 100644
--- a/emgauwa-controller/Cargo.toml
+++ b/emgauwa-controller/Cargo.toml
@@ -26,3 +26,7 @@ sqlx = { version = "0.7", features = ["sqlite", "runtime-tokio", "macros", "chro
 
 futures = "0.3"
 futures-channel = "0.3"
+
+rppal = "0.17"
+rppal-pfd = "0.0.5"
+rppal-mcp23s17 = "0.0.3"
diff --git a/emgauwa-controller/src/app_state.rs b/emgauwa-controller/src/app_state.rs
index 8eb56fb..a6b3bbf 100644
--- a/emgauwa-controller/src/app_state.rs
+++ b/emgauwa-controller/src/app_state.rs
@@ -3,6 +3,7 @@ use std::time::{Duration, Instant};
 
 use actix::{Actor, Context, Handler, Message};
 use emgauwa_lib::constants;
+use emgauwa_lib::drivers::RelayDriver;
 use emgauwa_lib::errors::EmgauwaError;
 use emgauwa_lib::models::Controller;
 use emgauwa_lib::types::RelayStates;
@@ -45,16 +46,23 @@ pub struct AppState {
 	pub pool: Pool<Sqlite>,
 	pub this: Controller,
 	pub settings: Settings,
+	pub drivers: Vec<Box<dyn RelayDriver>>,
 	pub controller_notifier: Arc<Notify>,
 	pub relay_notifier: Arc<Notify>,
 }
 
 impl AppState {
-	pub fn new(pool: Pool<Sqlite>, this: Controller, settings: Settings) -> AppState {
+	pub fn new(
+		pool: Pool<Sqlite>,
+		this: Controller,
+		settings: Settings,
+		drivers: Vec<Box<dyn RelayDriver>>,
+	) -> AppState {
 		AppState {
 			pool,
 			this,
 			settings,
+			drivers,
 			controller_notifier: Arc::new(Notify::new()),
 			relay_notifier: Arc::new(Notify::new()),
 		}
@@ -93,6 +101,14 @@ impl Handler<UpdateRelayStates> for AppState {
 
 	fn handle(&mut self, msg: UpdateRelayStates, _ctx: &mut Self::Context) -> Self::Result {
 		self.this.apply_relay_states(&msg.relay_states);
+		self.drivers
+			.iter_mut()
+			.zip(msg.relay_states.iter())
+			.for_each(|(driver, state)| {
+				if let Err(e) = driver.set(state.unwrap_or(false)) {
+					log::error!("Error setting relay: {}", e);
+				}
+			});
 
 		self.notify_relay_change();
 	}
diff --git a/emgauwa-controller/src/main.rs b/emgauwa-controller/src/main.rs
index e6c329f..bde6b6d 100644
--- a/emgauwa-controller/src/main.rs
+++ b/emgauwa-controller/src/main.rs
@@ -5,6 +5,7 @@ use emgauwa_lib::errors::EmgauwaError;
 use emgauwa_lib::models::{Controller, FromDbModel};
 use emgauwa_lib::types::ControllerUid;
 use emgauwa_lib::utils::{drop_privileges, init_logging};
+use rppal_pfd::PiFaceDigital;
 use sqlx::pool::PoolConnection;
 use sqlx::Sqlite;
 
@@ -64,6 +65,9 @@ async fn main() -> Result<(), std::io::Error> {
 
 	init_logging(&settings.logging.level)?;
 
+	let mut pfd: Option<PiFaceDigital> = None;
+	let drivers = settings.relays_make_drivers(&mut pfd)?;
+
 	let pool = db::init(&settings.database)
 		.await
 		.map_err(EmgauwaError::from)?;
@@ -109,7 +113,7 @@ async fn main() -> Result<(), std::io::Error> {
 		settings.server.host, settings.server.port
 	);
 
-	let app_state = app_state::AppState::new(pool.clone(), this, settings).start();
+	let app_state = app_state::AppState::new(pool.clone(), this, settings, drivers).start();
 
 	let _ = tokio::join!(
 		tokio::spawn(run_relays_loop(app_state.clone())),
diff --git a/emgauwa-controller/src/settings.rs b/emgauwa-controller/src/settings.rs
index 0c4572e..2eda813 100644
--- a/emgauwa-controller/src/settings.rs
+++ b/emgauwa-controller/src/settings.rs
@@ -1,5 +1,7 @@
+use emgauwa_lib::drivers::{GpioDriver, PifaceDriver, RelayDriver};
 use emgauwa_lib::errors::EmgauwaError;
 use emgauwa_lib::settings;
+use rppal_pfd::PiFaceDigital;
 use serde_derive::Deserialize;
 
 use crate::driver::Driver;
@@ -72,4 +74,33 @@ impl Settings {
 	pub fn get_relay(&self, number: i64) -> Option<&Relay> {
 		self.relays.iter().find(|r| r.number == Some(number))
 	}
+
+	pub fn relays_make_drivers(
+		&self,
+		pfd: &mut Option<PiFaceDigital>,
+	) -> Result<Vec<Box<dyn RelayDriver>>, EmgauwaError> {
+		let mut drivers = Vec::new();
+		for relay in &self.relays {
+			drivers.push(relay.make_driver(pfd)?);
+		}
+		Ok(drivers)
+	}
+}
+
+impl Relay {
+	pub fn make_driver(
+		&self,
+		pfd: &mut Option<PiFaceDigital>,
+	) -> Result<Box<dyn RelayDriver>, EmgauwaError> {
+		let driver: Box<dyn RelayDriver> = match self.driver {
+			Driver::Gpio => Box::new(GpioDriver::new(self.pin, self.inverted)?),
+			Driver::Piface => {
+				if pfd.is_none() {
+					*pfd = Some(PifaceDriver::init_piface()?);
+				}
+				Box::new(PifaceDriver::new(self.pin, pfd)?)
+			}
+		};
+		Ok(driver)
+	}
 }
diff --git a/emgauwa-lib/Cargo.toml b/emgauwa-lib/Cargo.toml
index d4ffd05..f34aa44 100644
--- a/emgauwa-lib/Cargo.toml
+++ b/emgauwa-lib/Cargo.toml
@@ -26,3 +26,7 @@ libsqlite3-sys = { version = "*", features = ["bundled"] }
 uuid = "1.6"
 futures = "0.3"
 libc = "0.2"
+
+rppal = "0.17"
+rppal-pfd = "0.0.5"
+rppal-mcp23s17 = "0.0.3"
diff --git a/emgauwa-lib/src/drivers/gpio.rs b/emgauwa-lib/src/drivers/gpio.rs
new file mode 100644
index 0000000..7847d43
--- /dev/null
+++ b/emgauwa-lib/src/drivers/gpio.rs
@@ -0,0 +1,35 @@
+use rppal::gpio::{Gpio, OutputPin};
+
+use crate::drivers::RelayDriver;
+use crate::errors::EmgauwaError;
+
+pub struct GpioDriver {
+	pub gpio: OutputPin,
+	pub inverted: bool,
+}
+
+impl GpioDriver {
+	pub fn new(pin: u8, inverted: bool) -> Result<Self, EmgauwaError> {
+		let gpio = Gpio::new()?.get(pin)?.into_output();
+		Ok(Self { gpio, inverted })
+	}
+}
+
+impl RelayDriver for GpioDriver {
+	fn set(&mut self, value: bool) -> Result<(), EmgauwaError> {
+		if self.get_high(value) {
+			self.gpio.set_high();
+		} else {
+			self.gpio.set_low();
+		}
+		Ok(())
+	}
+
+	fn get_pin(&self) -> u8 {
+		self.gpio.pin()
+	}
+
+	fn get_inverted(&self) -> bool {
+		self.inverted
+	}
+}
diff --git a/emgauwa-lib/src/drivers/mod.rs b/emgauwa-lib/src/drivers/mod.rs
new file mode 100644
index 0000000..71b1cfa
--- /dev/null
+++ b/emgauwa-lib/src/drivers/mod.rs
@@ -0,0 +1,17 @@
+mod gpio;
+mod piface;
+
+pub use gpio::GpioDriver;
+pub use piface::PifaceDriver;
+
+use crate::errors::EmgauwaError;
+
+pub trait RelayDriver {
+	fn get_high(&self, value: bool) -> bool {
+		value ^ self.get_inverted()
+	}
+
+	fn set(&mut self, value: bool) -> Result<(), EmgauwaError>;
+	fn get_pin(&self) -> u8;
+	fn get_inverted(&self) -> bool;
+}
diff --git a/emgauwa-lib/src/drivers/piface.rs b/emgauwa-lib/src/drivers/piface.rs
new file mode 100644
index 0000000..74c7857
--- /dev/null
+++ b/emgauwa-lib/src/drivers/piface.rs
@@ -0,0 +1,52 @@
+use rppal_pfd::{
+	ChipSelect, HardwareAddress, OutputPin, PiFaceDigital, PiFaceDigitalError, SpiBus, SpiMode,
+};
+
+use crate::drivers::RelayDriver;
+use crate::errors::EmgauwaError;
+
+pub struct PifaceDriver {
+	pub pfd_pin: OutputPin,
+}
+
+impl PifaceDriver {
+	pub fn new(pin: u8, pfd: &Option<PiFaceDigital>) -> Result<Self, EmgauwaError> {
+		let pfd = pfd.as_ref().ok_or(EmgauwaError::Hardware(String::from(
+			"PiFaceDigital not initialized",
+		)))?;
+		let pfd_pin = pfd.get_output_pin(pin)?;
+		Ok(Self { pfd_pin })
+	}
+
+	pub fn init_piface() -> Result<PiFaceDigital, EmgauwaError> {
+		let mut pfd = PiFaceDigital::new(
+			HardwareAddress::new(0)?,
+			SpiBus::Spi0,
+			ChipSelect::Cs0,
+			100_000,
+			SpiMode::Mode0,
+		)?;
+		pfd.init()?;
+
+		Ok(pfd)
+	}
+}
+
+impl RelayDriver for PifaceDriver {
+	fn set(&mut self, value: bool) -> Result<(), EmgauwaError> {
+		if self.get_high(value) {
+			self.pfd_pin.set_high().map_err(PiFaceDigitalError::from)?;
+		} else {
+			self.pfd_pin.set_low().map_err(PiFaceDigitalError::from)?;
+		}
+		Ok(())
+	}
+
+	fn get_pin(&self) -> u8 {
+		self.pfd_pin.get_pin_number()
+	}
+
+	fn get_inverted(&self) -> bool {
+		false
+	}
+}
diff --git a/emgauwa-lib/src/errors/emgauwa_error.rs b/emgauwa-lib/src/errors/emgauwa_error.rs
index b947c16..3cf72d5 100644
--- a/emgauwa-lib/src/errors/emgauwa_error.rs
+++ b/emgauwa-lib/src/errors/emgauwa_error.rs
@@ -6,6 +6,9 @@ use actix::MailboxError;
 use actix_web::http::StatusCode;
 use actix_web::HttpResponse;
 use config::ConfigError;
+use rppal::gpio;
+use rppal_mcp23s17::Mcp23s17Error;
+use rppal_pfd::PiFaceDigitalError;
 use serde::ser::SerializeStruct;
 use serde::{Serialize, Serializer};
 
@@ -21,6 +24,7 @@ pub enum EmgauwaError {
 	Other(String),
 	Internal(String),
 	Connection(ControllerUid),
+	Hardware(String),
 }
 
 impl EmgauwaError {
@@ -33,6 +37,7 @@ impl EmgauwaError {
 			EmgauwaError::Internal(_) => StatusCode::INTERNAL_SERVER_ERROR,
 			EmgauwaError::Connection(_) => StatusCode::GATEWAY_TIMEOUT,
 			EmgauwaError::Other(_) => StatusCode::INTERNAL_SERVER_ERROR,
+			EmgauwaError::Hardware(_) => StatusCode::INTERNAL_SERVER_ERROR,
 		}
 	}
 }
@@ -47,6 +52,7 @@ impl From<&EmgauwaError> for String {
 			EmgauwaError::Internal(_) => String::from("internal error"),
 			EmgauwaError::Connection(_) => String::from("the target controller is not connected"),
 			EmgauwaError::Other(err) => format!("other error: {}", err),
+			EmgauwaError::Hardware(err) => format!("hardware error: {}", err),
 		}
 	}
 }
@@ -93,6 +99,25 @@ impl From<ConfigError> for EmgauwaError {
 	}
 }
 
+impl From<gpio::Error> for EmgauwaError {
+	fn from(value: gpio::Error) -> Self {
+		Self::Hardware(value.to_string())
+	}
+}
+
+impl From<PiFaceDigitalError> for EmgauwaError {
+	fn from(value: PiFaceDigitalError) -> Self {
+		match value {
+			PiFaceDigitalError::Mcp23s17Error { source } => match source {
+				Mcp23s17Error::SpiError { source } => Self::Hardware(source.to_string()),
+				_ => Self::Hardware(source.to_string()),
+			},
+			PiFaceDigitalError::GpioError { source } => Self::Hardware(source.to_string()),
+			_ => Self::Hardware(value.to_string()),
+		}
+	}
+}
+
 impl From<&EmgauwaError> for HttpResponse {
 	fn from(err: &EmgauwaError) -> Self {
 		HttpResponse::build(err.get_code()).json(err)
diff --git a/emgauwa-lib/src/lib.rs b/emgauwa-lib/src/lib.rs
index f939d0c..14609b9 100644
--- a/emgauwa-lib/src/lib.rs
+++ b/emgauwa-lib/src/lib.rs
@@ -1,5 +1,6 @@
 pub mod constants;
 pub mod db;
+pub mod drivers;
 pub mod errors;
 pub mod models;
 pub mod settings;