diff --git a/Cargo.toml b/Cargo.toml
index 1dc8373..9c12ca6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,9 +3,9 @@ name = "device"
 version = "0.1.0"
 authors = ["Romulus21 <romain@delanoe.pro>"]
 edition = "2018"
+description = "Send metrics to MQTT server"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
 rumqttc = "0.23.0"
-
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..2198c4d
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,6 @@
+deploy:
+	ssh raspiwork 'cd /home/pi/Scripts/rust_device && git pull && make build'
+
+build:
+	cargo build --release
+	scp target/release/device raspigate::/home/pi/Scripts/device
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..3a3ce95
--- /dev/null
+++ b/README.md
@@ -0,0 +1,4 @@
+to run, add this line to crontab:
+```
+*/5 * * * * cd /path/to/folder && ./device
+```
diff --git a/src/device_var.rs b/src/device_var.rs
index ecd34d2..f475cb1 100644
--- a/src/device_var.rs
+++ b/src/device_var.rs
@@ -5,14 +5,8 @@ use std::io::{self, BufRead};
 use std::path::Path;
 
 pub fn read_env_var() {
-    let filename = "device.env";
-    let mut path = env::var("HOME").unwrap().to_string();
-    path.push_str("/Scripts/");
-    path.push_str(filename);
-    println!("{}", path);
-
-    fs::read_to_string(path.clone())
-        .expect("Something went wrong reading the file : device.env");
+    let path = "device.env";
+    fs::read_to_string(path).expect("Something went wrong reading the file : device.env");
 
     if let Ok(lines) = read_lines(path) {
         for line in lines {
@@ -23,15 +17,19 @@ pub fn read_env_var() {
         }
     }
 
-    // println!("\n");
-    // for (key, value) in env::vars() {
-    //     println!("{}: {}", key, value);
-    // }
-    // println!("\n");
+    /*
+        println!("\n");
+        for (key, value) in env::vars() {
+            println!("{}: {}", key, value);
+        }
+        println!("\n");
+    */
 }
 
 fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
-where P: AsRef<Path>, {
+where
+    P: AsRef<Path>,
+{
     let file = File::open(filename)?;
     Ok(io::BufReader::new(file).lines())
 }
diff --git a/src/main.rs b/src/main.rs
index cca3567..84becee 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,17 +1,20 @@
 use std::env;
 
+mod device_var;
 mod mqtt_pub;
 mod system_values;
-mod device_var;
 
 fn main() {
-
     device_var::read_env_var();
 
     let mut count = 3;
     let (mut cli, connection) = mqtt_pub::init_cli();
 
-    cli = mqtt_pub::publish_message(cli, "temperature", system_values::get_temperature().to_string());
+    cli = mqtt_pub::publish_message(
+        cli,
+        "temperature",
+        system_values::get_temperature().to_string(),
+    );
     cli = mqtt_pub::publish_message(cli, "storage", system_values::get_storage().to_string());
     cli = mqtt_pub::publish_message(cli, "mem", system_values::get_mem().to_string());
 
@@ -23,4 +26,3 @@ fn main() {
 
     mqtt_pub::disconnect(connection, count);
 }
-
diff --git a/src/mqtt_pub.rs b/src/mqtt_pub.rs
index 4bd67e3..78517b2 100644
--- a/src/mqtt_pub.rs
+++ b/src/mqtt_pub.rs
@@ -1,11 +1,9 @@
-use std::{
-    env,
-    time::Duration
-};
 use rumqttc::{Client, Connection, MqttOptions, QoS};
+use std::{env, time::Duration};
 
 pub fn init_cli() -> (Client, Connection) {
-    let mut mqttoptions = MqttOptions::new("test-1", env::var("BROKER_ADDRESS").unwrap().to_string(), 1883);
+    let mut mqttoptions =
+        MqttOptions::new("test-1", env::var("MQTT_HOST").unwrap().to_string(), 1883);
     mqttoptions.set_keep_alive(Duration::from_secs(1));
     let (client, connection) = Client::new(mqttoptions, 10);
 
@@ -13,7 +11,9 @@ pub fn init_cli() -> (Client, Connection) {
 }
 
 pub fn publish_message(mut client: Client, topic: &str, payload: String) -> Client {
-    client.publish(get_topic_name(topic), QoS::AtLeastOnce, true, payload).unwrap();
+    client
+        .publish(get_topic_name(topic), QoS::AtLeastOnce, true, payload)
+        .unwrap();
     client
 }
 
@@ -36,7 +36,6 @@ pub fn disconnect(mut connection: Connection, count: usize) {
 }
 
 pub fn get_topic_name(types: &str) -> String {
-
     let mut topic = env::var("SERVICE").unwrap().to_string();
     topic.push('/');
     let capteur = env::var("CAPTEUR").unwrap().to_string();
@@ -44,5 +43,5 @@ pub fn get_topic_name(types: &str) -> String {
     topic.push('/');
     topic.push_str(&types);
 
-    return topic;
-}
\ No newline at end of file
+    topic
+}
diff --git a/src/system_values.rs b/src/system_values.rs
index afac5e0..7ae024b 100644
--- a/src/system_values.rs
+++ b/src/system_values.rs
@@ -25,7 +25,7 @@ pub fn get_temperature() -> f32 {
         temperature += temperature_string.parse::<f32>().unwrap();
     }
 
-    return temperature;
+    temperature
 }
 
 pub fn get_storage() -> i8 {
@@ -41,7 +41,7 @@ pub fn get_storage() -> i8 {
     value.pop();
     let storage = value.parse::<i8>().unwrap();
 
-    return storage;
+    storage
 }
 
 pub fn get_mem() -> i8 {
@@ -56,7 +56,7 @@ pub fn get_mem() -> i8 {
     let mem_use = vec_mem[8].parse::<f32>().unwrap();
     let result = (mem_use / total * 100.0) as i8;
 
-    return result;
+    result
 }
 
 pub fn get_battery() -> i8 {
@@ -75,5 +75,5 @@ pub fn get_battery() -> i8 {
             .unwrap();
     }
 
-    return battery;
+    battery
 }