diff --git a/src/control.rs b/src/control.rs
new file mode 100644
index 0000000..7b9ae29
--- /dev/null
+++ b/src/control.rs
@@ -0,0 +1,5 @@
+use crate::types::{Error, PowerState};
+
+pub trait Control {
+    async fn set_power(&self, state: PowerState) -> Result<(), Error>;
+}
diff --git a/src/main.rs b/src/main.rs
index 129371c..a85d5e0 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,21 +1,36 @@
 use clap::{Parser, Subcommand};
-use monitor::Monitor;
 
+mod control;
 mod monitor;
+mod system;
 mod tasmota;
+mod types;
+
+#[derive(Parser)]
+pub struct PowerCommand {
+    index: usize,
+    #[command(subcommand)]
+    state: types::PowerState,
+}
 
 #[derive(Subcommand)]
 pub enum Commands {
     Monitor,
+    Set(PowerCommand),
 }
 
 impl Commands {
     pub async fn execute(self, config_file: &str) {
+        let s = system::System::new_from_file(config_file).unwrap();
+
         let handle = match self {
-            Self::Monitor => {
-                let m = Monitor::new_from_file(config_file).unwrap();
+            Self::Monitor => tokio::spawn(async move {
+                s.try_get_power().await.unwrap();
+            }),
+            Self::Set(command) => {
+                // let c = Controller::new_from_file(config_file).unwrap();
                 tokio::spawn(async move {
-                    m.get_power().await.unwrap();
+                    s.try_set_power(command.index, command.state).await.unwrap();
                 })
             }
         };
diff --git a/src/monitor.rs b/src/monitor.rs
index c43974a..6d121d9 100644
--- a/src/monitor.rs
+++ b/src/monitor.rs
@@ -1,68 +1,9 @@
 use crate::tasmota::{PowerStatusData, StatusResponse, TasmotaInterface, TasmotaInterfaceConfig};
+use crate::types::Error;
 use reqwest::Client;
 use serde::Deserialize;
 use std::fs;
-use thiserror::Error;
-
-#[derive(Error, Debug)]
-pub enum Error {
-    #[error("io error")]
-    IoError(#[from] std::io::Error),
-    #[error("toml parsing error")]
-    ParseError(#[from] toml::de::Error),
-    #[error("request error")]
-    RequestError(#[from] reqwest::Error),
-    #[error("JSON Parse error")]
-    JsonParseError(#[from] serde_json::Error),
-}
 
 pub trait Monitoring {
     async fn get_power(&self) -> Result<isize, Error>;
 }
-
-#[derive(Deserialize)]
-pub struct MonitorConfig {
-    targets: Vec<TasmotaInterfaceConfig>,
-}
-impl MonitorConfig {
-    fn print(&self) {
-        for t in &self.targets {
-            t.print();
-        }
-    }
-}
-
-pub struct Monitor {
-    targets: Vec<TasmotaInterface>,
-    client: Client,
-}
-
-impl Monitor {
-    pub fn new_from_file(config_file: &str) -> Result<Self, Error> {
-        let config_str = fs::read_to_string(config_file)?;
-        let config: MonitorConfig = toml::from_str(&config_str)?;
-        Ok(Self {
-            targets: Monitor::load_targets(&config.targets),
-            client: Client::new(),
-        })
-    }
-
-    pub fn load_targets(targets: &Vec<TasmotaInterfaceConfig>) -> Vec<TasmotaInterface> {
-        let mut v = Vec::new();
-        for target in targets {
-            v.push(TasmotaInterface::new(target.clone()));
-        }
-        v
-    }
-
-    pub async fn get_power(&self) -> Result<(), Error> {
-        for target in &self.targets {
-            if let Ok(res) = target.get_power().await {
-                target.print();
-                println!("* POWER: {}W", res);
-                println!("------------------")
-            }
-        }
-        Ok(())
-    }
-}
diff --git a/src/system.rs b/src/system.rs
new file mode 100644
index 0000000..b5ffa8c
--- /dev/null
+++ b/src/system.rs
@@ -0,0 +1,58 @@
+use crate::control::Control;
+use crate::monitor::Monitoring;
+use crate::tasmota::{TasmotaInterface, TasmotaInterfaceConfig};
+use crate::types::{self, Error};
+use reqwest::Client;
+use serde::Deserialize;
+use std::fs;
+
+#[derive(Deserialize)]
+pub struct SystemConfig {
+    components: Vec<TasmotaInterfaceConfig>,
+}
+impl SystemConfig {
+    fn print(&self) {
+        for t in &self.components {
+            t.print();
+        }
+    }
+}
+
+pub struct System {
+    components: Vec<TasmotaInterface>,
+}
+
+impl System {
+    pub fn new_from_file(config_file: &str) -> Result<Self, Error> {
+        let config_str = fs::read_to_string(config_file)?;
+        let config: SystemConfig = toml::from_str(&config_str)?;
+        Ok(Self {
+            components: System::load_targets(&config.components),
+        })
+    }
+
+    pub fn load_targets(targets: &Vec<TasmotaInterfaceConfig>) -> Vec<TasmotaInterface> {
+        let mut v = Vec::new();
+        for target in targets {
+            v.push(TasmotaInterface::new(target.clone()));
+        }
+        v
+    }
+
+    pub async fn try_get_power(&self) -> Result<(), Error> {
+        for component in &self.components {
+            if let Ok(res) = component.get_power().await {
+                component.print();
+                println!("* POWER: {}W", res);
+                println!("------------------")
+            }
+        }
+        Ok(())
+    }
+
+    pub async fn try_set_power(&self, index: usize, state: types::PowerState) -> Result<(), Error> {
+        //TODO: check bounds
+        self.components[index].set_power(state).await?;
+        Ok(())
+    }
+}
diff --git a/src/tasmota.rs b/src/tasmota.rs
index 1ad6f5b..b8bae8a 100644
--- a/src/tasmota.rs
+++ b/src/tasmota.rs
@@ -1,8 +1,11 @@
 use reqwest::Client;
 use serde::Deserialize;
 
-use crate::monitor::Error;
-use crate::monitor::Monitoring;
+use crate::{
+    control::Control,
+    monitor::Monitoring,
+    types::{Error, PowerState},
+};
 
 #[derive(Deserialize)]
 pub struct EnergyData {
@@ -69,3 +72,23 @@ impl Monitoring for TasmotaInterface {
         Ok(data.status.energy.power)
     }
 }
+
+impl Control for TasmotaInterface {
+    async fn set_power(&self, state: PowerState) -> Result<(), Error> {
+        let cmd = match state {
+            PowerState::Off => "OFF",
+            PowerState::On => "ON",
+        };
+        let _res = self
+            .client
+            .get(format!(
+                "http://{}/cm?cmnd=Power%20{}",
+                &self.config.target, cmd
+            ))
+            .send()
+            .await?
+            .text()
+            .await?;
+        Ok(())
+    }
+}
diff --git a/src/types.rs b/src/types.rs
new file mode 100644
index 0000000..d25711e
--- /dev/null
+++ b/src/types.rs
@@ -0,0 +1,21 @@
+use clap::Parser;
+use serde::{Deserialize, Serialize};
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum Error {
+    #[error("io error")]
+    IoError(#[from] std::io::Error),
+    #[error("toml parsing error")]
+    ParseError(#[from] toml::de::Error),
+    #[error("request error")]
+    RequestError(#[from] reqwest::Error),
+    #[error("JSON Parse error")]
+    JsonParseError(#[from] serde_json::Error),
+}
+
+#[derive(Serialize, Deserialize, Parser, Clone)]
+pub enum PowerState {
+    Off,
+    On,
+}