diff --git a/i2c.c b/i2c.c
index c455c1e..1f086b9 100644
--- a/i2c.c
+++ b/i2c.c
@@ -4,6 +4,7 @@
 #include <util/delay.h>
 #include <util/twi.h>
 #include <stdint.h>
+#include "uart.h" // DEBUG macro
 
 void I2C_init() {
     // Set the prescaler to 1
@@ -17,23 +18,29 @@ uint8_t I2C_start(uint8_t addr) {
     // Send the start condition
     TWCR = (1 << TWINT) | (1 << TWSTA) | (1 << TWEN);
 
+    DEBUG("Waiting for start condition to be sent");
     // Wait for the start condition to be sent
     while (!(TWCR & (1 << TWINT)))
         ;
 
+    DEBUG("Start condition sent");
     // Load the address of the slave device
     TWDR = addr;
 
+    DEBUG("Sending address");
     // Clear the TWINT bit to start the transmission
     TWCR = (1 << TWINT) | (1 << TWEN);
 
+    DEBUG("Waiting for address to be sent");
     // Wait for the address to be sent
     while (!(TWCR & (1 << TWINT)))
         ;
 
+    DEBUG("Address sent");
     // Get the status of the transmission
     uint8_t status = TWSR & 0xF8;
 
+    DEBUG("Checking status");
     // Return true if the slave acknowledged the address
     return (status == TW_MT_SLA_ACK || status == TW_MR_SLA_ACK);
 }
diff --git a/i2c.h b/i2c.h
index ed984e9..e1ec836 100644
--- a/i2c.h
+++ b/i2c.h
@@ -4,8 +4,17 @@
 #define TW_WRITE 0
 #define TW_READ 1
 
+// Function to initialize I2C
 void I2C_init();
+
+// Function to send start condition
 uint8_t I2C_start(uint8_t addr);
+
+// Function to send stop condition
 void I2C_stop();
+
+// Write a byte to I2C bus
 uint8_t I2C_write(uint8_t data);
+
+// Read a byte from I2C bus
 uint8_t I2C_read(uint8_t ack);
\ No newline at end of file