diff --git a/Cargo.toml b/Cargo.toml
index 1b4a46d..a9ba871 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,5 @@
 [package]
-name = "lazer"
+name = "lj_rust"
 version = "0.1.0"
 edition = "2021"
 
diff --git a/copyme.Settings.toml b/copyme.Settings.toml
index 5296d56..21944b6 100644
--- a/copyme.Settings.toml
+++ b/copyme.Settings.toml
@@ -1,6 +1,20 @@
+# file: Settings.toml
+# Rename me !
+
+# The main key of your laser in LJ
 laser_id = 0
+
+# Activate for more debug 
 debug = "true"
+
+# Redis URL as IP:port  
 redis_url = "127.0.0.1"
+
+# Either Helios or Etherdream
 dac_family = "Helios"
-dac_id = 1
+
+# For Helios. USB Device Id of the DAC 
+dac_id = 0
+
+# For Etherdream. IP of the DAC
 dac_url = "192.168.1.68"
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..167b21e
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,2 @@
+pub mod conf;
+pub mod redis_ctrl;
\ No newline at end of file
diff --git a/tests/test_conf.rs b/tests/test_conf.rs
new file mode 100644
index 0000000..1305e13
--- /dev/null
+++ b/tests/test_conf.rs
@@ -0,0 +1,6 @@
+use lj_rust::conf;
+
+#[test]
+fn it_adds_two() {
+    assert_eq!(4, 4);
+}
\ No newline at end of file