diff --git a/csaxs_bec/devices/epics/delay_generator_csaxs/__init__.py b/csaxs_bec/devices/epics/delay_generator_csaxs/__init__.py
index 04a1eea..beab8e9 100644
--- a/csaxs_bec/devices/epics/delay_generator_csaxs/__init__.py
+++ b/csaxs_bec/devices/epics/delay_generator_csaxs/__init__.py
@@ -1,2 +1,14 @@
 from .ddg_1 import DDG1
 from .ddg_2 import DDG2
+from .delay_generator_csaxs import (
+    BURSTCONFIG,
+    CHANNELREFERENCE,
+    OUTPUTPOLARITY,
+    STATUSBITS,
+    TRIGGERINHIBIT,
+    TRIGGERSOURCE,
+    AllChannelNames,
+    ChannelConfig,
+    DelayChannelNames,
+)
+from .error_registry import ERROR_CODES
diff --git a/tests/tests_devices/test_delay_generator_csaxs.py b/tests/tests_devices/test_delay_generator_csaxs.py
index 2274c5d..0d6e5b4 100644
--- a/tests/tests_devices/test_delay_generator_csaxs.py
+++ b/tests/tests_devices/test_delay_generator_csaxs.py
@@ -8,14 +8,42 @@ import ophyd
 import pytest
 from ophyd_devices.tests.utils import MockPV, patch_dual_pvs
 
+from csaxs_bec.devices.epics.delay_generator_csaxs import DDG1, DDG2
 from csaxs_bec.devices.epics.delay_generator_csaxs.delay_generator_csaxs import (
     BURSTCONFIG,
+    CHANNELREFERENCE,
     STATUSBITS,
     TRIGGERSOURCE,
     DelayGeneratorCSAXS,
 )
 
 
+@pytest.fixture(scope="function")
+def mock_ddg1() -> Generator[DDG1, DDG1, DDG1]:
+    """Fixture to mock the DDG1 device."""
+    name = "ddg1"
+    prefix = "test_ddg1:"
+    with mock.patch.object(ophyd, "cl") as mock_cl:
+        mock_cl.get_pv = MockPV
+        mock_cl.thread_class = threading.Thread
+        dev = DDG1(name=name, prefix=prefix)
+        patch_dual_pvs(dev)
+        yield dev
+
+
+@pytest.fixture(scope="function")
+def mock_ddg2() -> Generator[DDG2, DDG2, DDG2]:
+    """Fixture to mock the DDG1 device."""
+    name = "ddg2"
+    prefix = "test_ddg2:"
+    with mock.patch.object(ophyd, "cl") as mock_cl:
+        mock_cl.get_pv = MockPV
+        mock_cl.thread_class = threading.Thread
+        dev = DDG2(name=name, prefix=prefix)
+        patch_dual_pvs(dev)
+        yield dev
+
+
 @pytest.fixture(scope="function")
 def mock_ddg() -> Generator[DelayGeneratorCSAXS, DelayGeneratorCSAXS, DelayGeneratorCSAXS]:
     """Fixture to mock the camera device."""
@@ -126,3 +154,136 @@ def test_ddg_set_delay_pairs(mock_ddg):
         assert np.isclose(getattr(mock_ddg, channel).width.get(), 0.2)
         assert np.isclose(getattr(mock_ddg, channel).ch1.setpoint.get(), delay)
         assert np.isclose(getattr(mock_ddg, channel).ch2.setpoint.get(), delay + 0.2)
+
+
+def test_ddg1_on_connected(mock_ddg1):
+    """Test the on_connected method of DDG1."""
+    mock_ddg1.on_connected()
+    # IO defaults
+    assert mock_ddg1.burst_mode.get() == 0
+    assert mock_ddg1.ab.io.amplitude.get() == 5.0
+    assert mock_ddg1.cd.io.offset.get() == 0.0
+    assert mock_ddg1.ef.io.polarity.get() == 1
+    assert mock_ddg1.gh.io.ttl_mode.get() == 1
+
+    # reference defaults
+    assert mock_ddg1.ab.ch1.reference.get() == 0  # CHANNELREFERENCE.T0.value
+    assert mock_ddg1.ab.ch2.reference.get() == 1  # CHANNELREFERENCE.A.value
+    assert mock_ddg1.cd.ch1.reference.get() == 0  # CHANNELREFERENCE.T0.value
+    assert mock_ddg1.cd.ch2.reference.get() == 3  # CHANNELREFERENCE.C.value
+    assert mock_ddg1.ef.ch1.reference.get() == 4  # CHANNELREFERENCE.D.value
+    assert mock_ddg1.ef.ch2.reference.get() == 5  # CHANNELREFERENCE.E.value
+    assert mock_ddg1.gh.ch1.reference.get() == 0  # CHANNELREFERENCE.T0.value
+    assert mock_ddg1.gh.ch2.reference.get() == 7  # CHANNELREFERENCE.G.value
+
+    # Default trigger source
+    assert mock_ddg1.trigger_source.get() == 5  # TRIGGERSOURCE.SINGLE_SHOT.value
+
+
+def test_ddg1_stage(mock_ddg1):
+    """Test the on_stage method of DDG1."""
+    exp_time = 0.1
+    frames_per_trigger = 10
+
+    mock_ddg1.burst_mode.put(1)
+    mock_ddg1.scan_info.msg.scan_parameters["exp_time"] = exp_time
+    mock_ddg1.scan_info.msg.scan_parameters["frames_per_trigger"] = frames_per_trigger
+
+    mock_ddg1.stage()
+
+    assert np.isclose(mock_ddg1.burst_mode.get(), 0)  # Burst mode is disabled
+    # Trigger DDG2 through EXT/EN
+
+    assert np.isclose(mock_ddg1.ab.delay.get(), 2e-3)
+    assert np.isclose(mock_ddg1.ab.width.get(), 1e-6)
+    # Shutter channel cd
+    assert np.isclose(mock_ddg1.cd.delay.get(), 0)
+    assert np.isclose(mock_ddg1.cd.width.get(), 2e-3 + exp_time * frames_per_trigger + 1e-3)
+    # MCS channel ef or gate
+    assert np.isclose(mock_ddg1.ef.delay.get(), 0)
+    assert np.isclose(mock_ddg1.ef.width.get(), 1e-6)
+
+    assert mock_ddg1.staged == ophyd.Staged.yes
+
+
+def test_ddg1_trigger(mock_ddg1):
+    """Test the on_trigger method of DDG1."""
+    mock_ddg1.state.event_status._read_pv.mock_data = (
+        5  # STATUSBITS.END_OF_DELAY.value + STATUSBITS.TRIG.value
+    )
+    status = mock_ddg1.trigger()
+    assert status.done is True
+    assert status.success is True
+    assert mock_ddg1.trigger_shot.get() == 1
+
+
+def test_ddg1_stop(mock_ddg1):
+    """Test the on_stop method of DDG1."""
+    mock_ddg1.burst_mode.put(1)  # Enable burst mode
+    mock_ddg1.stop()
+    assert mock_ddg1.burst_mode.get() == 0  # Burst mode is disabled
+
+
+def test_ddg2_on_connected(mock_ddg2):
+    """Test on connected method of DDG2."""
+    mock_ddg2.on_connected()
+    # IO defaults
+    assert mock_ddg2.burst_mode.get() == 0
+    assert mock_ddg2.ab.io.amplitude.get() == 5.0
+    assert mock_ddg2.cd.io.offset.get() == 0.0
+    assert mock_ddg2.ef.io.polarity.get() == 1
+    assert mock_ddg2.gh.io.ttl_mode.get() == 1
+
+    # reference defaults
+    assert mock_ddg2.ab.ch1.reference.get() == 0  # CHANNELREFERENCE.T0.value
+    assert mock_ddg2.ab.ch2.reference.get() == 1  # CHANNELREFERENCE.A.value
+    assert mock_ddg2.cd.ch1.reference.get() == 0  # CHANNELREFERENCE.T0.value
+    assert mock_ddg2.cd.ch2.reference.get() == 3  # CHANNELREFERENCE.C.value
+    assert mock_ddg2.ef.ch1.reference.get() == 0  # CHANNELREFERENCE.T0.value
+    assert mock_ddg2.ef.ch2.reference.get() == 5  # CHANNELREFERENCE.E.value
+    assert mock_ddg2.gh.ch1.reference.get() == 0  # CHANNELREFERENCE.T0.value
+    assert mock_ddg2.gh.ch2.reference.get() == 7  # CHANNELREFERENCE.G.value
+
+    # Default trigger source
+    assert mock_ddg2.trigger_source.get() == 1  # TRIGGERSOURCE.EXT_RISING_EDGE.value
+
+
+def test_ddg2_stage(mock_ddg2):
+    """Test the on_stage method of DDG2."""
+    exp_time = 0.1
+    frames_per_trigger = 10
+    mock_ddg2.on_connected()
+
+    mock_ddg2.burst_mode.put(0)
+    mock_ddg2.scan_info.msg.scan_parameters["exp_time"] = exp_time
+    mock_ddg2.scan_info.msg.scan_parameters["frames_per_trigger"] = frames_per_trigger
+
+    mock_ddg2.stage()
+
+    assert np.isclose(mock_ddg2.burst_mode.get(), 1)  # Burst mode is enabled
+    assert np.isclose(mock_ddg2.ab.delay.get(), 0)
+    assert np.isclose(mock_ddg2.ab.width.get(), exp_time - 2e-4)  # DEFAULT_READOUT_TIMES["ab"])
+    assert mock_ddg2.burst_count.get() == frames_per_trigger
+    assert np.isclose(mock_ddg2.burst_delay.get(), 0)
+    assert np.isclose(mock_ddg2.burst_period.get(), exp_time)
+
+    assert mock_ddg2.trigger_source.get() == TRIGGERSOURCE.EXT_RISING_EDGE.value
+
+    assert mock_ddg2.staged == ophyd.Staged.yes
+
+
+def test_ddg2_trigger(mock_ddg2):
+    """Test the on_trigger method of DDG2."""
+    mock_ddg2.trigger_shot.put(0)
+    status = mock_ddg2.trigger()
+    assert mock_ddg2.trigger_shot.get() == 0  # Should not trigger DDG2 via soft trigger
+    status.wait()
+    assert status.done is True
+    assert status.success is True
+
+
+def test_ddg2_stop(mock_ddg2):
+    """Test the on_stop method of DDG2."""
+    mock_ddg2.burst_mode.put(1)  # Enable burst mode
+    mock_ddg2.stop()
+    assert mock_ddg2.burst_mode.get() == 0  # Burst mode is disabled