diff --git a/.gitignore b/.gitignore
index f97c8f4..ca224f7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -171,3 +171,4 @@ cython_debug/
 
 # PyPI configuration file
 .pypirc
+.DS_Store
diff --git a/rv3028/rv3028.py b/rv3028/rv3028.py
old mode 100644
new mode 100755
index 7b1d177..04552c0
--- a/rv3028/rv3028.py
+++ b/rv3028/rv3028.py
@@ -20,9 +20,12 @@
 )
 
 try:
-    from tests.stubs.i2c_device import I2CDevice
+    from tests.stubs.i2c_device import I2C, I2CDevice
 except ImportError:
     from adafruit_bus_device.i2c_device import I2CDevice
+    from busio import I2C
+
+_RV3028_DEFAULT_ADDRESS = 0x52
 
 
 class WEEKDAY:
@@ -36,8 +39,13 @@ class WEEKDAY:
 
 
 class RV3028:
-    def __init__(self, i2c_device: I2CDevice):
-        self.i2c_device = i2c_device
+    def __init__(self, i2c, address: int = _RV3028_DEFAULT_ADDRESS):
+        if isinstance(i2c, I2C):
+            self.i2c_device = I2CDevice(i2c, address)
+        elif isinstance(i2c, I2CDevice):
+            self.i2c_device = i2c
+        else:
+            raise TypeError("i2c should be an i2c bus or device!")
 
     def _read_register(self, register, length=1):
         with self.i2c_device as i2c:
diff --git a/tests/mocks/i2cMock.py b/tests/mocks/i2cMock.py
index 5e78799..713b783 100644
--- a/tests/mocks/i2cMock.py
+++ b/tests/mocks/i2cMock.py
@@ -1,9 +1,12 @@
-class MockI2C:
+from tests.stubs.i2c_device import I2C, I2CDevice
+
+
+class MockI2C(I2C):
     def __init__(self):
         self.registers = [0x00] * 256  # 256 8 bit registers
 
 
-class MockI2CDevice:
+class MockI2CDevice(I2CDevice):
     def __init__(self, i2c: MockI2C, address):
         self.i2c = i2c
         self.address = address
diff --git a/tests/stubs/i2c_device.py b/tests/stubs/i2c_device.py
index c4d0af1..b6e8eb4 100644
--- a/tests/stubs/i2c_device.py
+++ b/tests/stubs/i2c_device.py
@@ -4,3 +4,7 @@ def __enter__(self): ...
     def __exit__(self, exc_type, exc_value, traceback): ...
     def write(self, data): ...
     def readinto(self, buffer): ...
+
+
+class I2C:
+    def __init__(self): ...