diff --git a/README.md b/README.md
index 1ed1876..0bca2e0 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,4 @@ $ ./upload.sh
 IF this step fails, edit the `upload.sh` script and change the `/dev/ttyUSB0` to the Serial port assiged to your Arduino (You can check this path with the Arduino IDE)
 
 ## Diagram
-```Rust
-todo!();
-```
+![Diagrama de RustyToken](imgs/diagram.png)
diff --git a/imgs/diagram.png b/imgs/diagram.png
new file mode 100644
index 0000000..fc0aac5
Binary files /dev/null and b/imgs/diagram.png differ
diff --git a/src/main.rs b/src/main.rs
index 4154b0b..decf267 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -41,8 +41,8 @@ fn main() -> ! {
 
     let i2c_clock = arduino_hal::I2c::new(
         dp.TWI,
-        pins.a4.into_pull_up_input(),
-        pins.a5.into_pull_up_input(),
+        pins.a4.into_pull_up_input(), // SDA
+        pins.a5.into_pull_up_input(), // SCL
         50000,
     );
     let mut rtc = ds323x::Ds323x::new_ds3231(i2c_clock);