fix

README.md

@@ -139,16 +139,16 @@ with SMBus(1) as bus:
 ```c
 uint8_t send_hat_command(int fd, uint8_t output) {
 
-int rv_hat = ioctl(fd, I2C_SLAVE, 0x20);
-if(rv_hat<0) { return rv_hat; }
+  int rv_hat = ioctl(fd, I2C_SLAVE, 0x20);
+  if(rv_hat<0) { return rv_hat; }
 
-unsigned char hat_command[1] = {0};
-int rw_hat = I2C_RW_Block(fd, 0x03, I2C_SMBUS_WRITE, 1, hat_command);
+  unsigned char hat_command[1] = {0};
+  int rw_hat = I2C_RW_Block(fd, 0x03, I2C_SMBUS_WRITE, 1, hat_command);
 
-hat_command[0] = output;
-rw_hat = I2C_RW_Block(fd, 0x01, I2C_SMBUS_WRITE, 1, hat_command);
+  hat_command[0] = output;
+  rw_hat = I2C_RW_Block(fd, 0x01, I2C_SMBUS_WRITE, 1, hat_command);
 
-return rw_hat;
+  return rw_hat;
 }
 ```
 
@@ -158,15 +158,15 @@ return rw_hat;
 uint8_t send_sysctl(int fd, uint8_t command) {
 
 unsigned char sysctl_buffer[5] = {0};
-sysctl_buffer[3] = command;
+  sysctl_buffer[3] = command;
 
-uint8_t rw = I2C_RW_Block(fd, 0x04, I2C_SMBUS_WRITE, 5, sysctl_buffer);
-if(rw == 0) { 
-	return 0; 
-} else {
+  uint8_t rw = I2C_RW_Block(fd, 0x04, I2C_SMBUS_WRITE, 5, sysctl_buffer);
+  if(rw == 0) { 
+  	return 0; 
+  } else {
 	RCLCPP_INFO(this->get_logger(), "I2C Error: %s", strerror(rw));
 	return rw;
-}
+  }
 
 }
 ```