diff --git a/api/__init__.py b/api/__init__.py
index cb32a38..7c33afd 100644
--- a/api/__init__.py
+++ b/api/__init__.py
@@ -100,4 +100,6 @@ from .s26_labels import get_label_schema, get_label, set_label, add_label, delet
 from .s27_backdrop import get_backdrop_schema, get_backdrop, set_backdrop
 
 from .s29_scada_model import SCADA_TYPE_PRESSURE, SCADA_TYPE_DEMAND, SCADA_TYPE_QUALITY, SCADA_TYPE_LEVEL, SCADA_TYPE_FLOW
-from .s29_scada_model import get_scada_model_schema, get_scada_model, set_scada_model, add_scada_model, delete_scada_model
\ No newline at end of file
+from .s29_scada_model import get_scada_model_schema, get_scada_model, set_scada_model, add_scada_model, delete_scada_model
+
+from .s30_scada_data import get_scada_data_schema, get_scada_data, set_scada_data
diff --git a/api/s30_scada_data.py b/api/s30_scada_data.py
new file mode 100644
index 0000000..e222131
--- /dev/null
+++ b/api/s30_scada_data.py
@@ -0,0 +1,51 @@
+from .database import *
+
+
+def get_scada_data_schema(name: str) -> dict[str, dict[str, Any]]:
+    return { 'device_id' : {'type': 'str'  , 'optional': False , 'readonly': True },
+             'data'      : {'type': 'list' , 'optional': False , 'readonly': False, 
+                           'element': { 'time'  : {'type': 'str'   , 'optional': False , 'readonly': False }, 
+                                        'value' : {'type': 'float' , 'optional': False , 'readonly': False } }}}
+
+
+def get_scada_data(name: str, device_id: str) -> dict[str, Any]:
+    sds = read_all(name, f"select * from scada_data where device_id = '{device_id}' order by time")
+    ds = []
+    for r in sds:
+        ds.append({ 'time': str(r['time']), 'value': float(r['value']) })
+    return { 'device_id': device_id, 'data': ds }
+
+
+def set_scada_data_cmd(name: str, cs: ChangeSet) -> DbChangeSet:
+    device_id = cs.operations[0]['device_id']
+
+    old = get_scada_data(name, device_id)
+    new = { 'device_id': device_id, 'data': [] }
+
+    f_device_id = f"'{device_id}'"
+
+    # TODO: transaction ?
+    redo_sql = f"delete from scada_data where device_id = {f_device_id};"
+    for tv in cs.operations[0]['data']:
+        time, value = str(tv['time']), float(tv['value'])
+        f_time, f_value = f"'{time}'", value
+        redo_sql += f"\ninsert into scada_data (device_id, time, value) values ({f_device_id}, {f_time}, {f_value});"
+        new['data'].append({ 'time': time, 'value': value })
+
+    undo_sql = f"delete from scada_data where device_id = {f_device_id};"
+    for tv in old['data']:
+        time, value = str(tv['time']), float(tv['value'])
+        f_time, f_value = f"'{time}'", value
+        undo_sql += f"\ninsert into scada_data (device_id, time, value) values ({f_device_id}, {f_time}, {f_value});"
+
+    redo_cs = { 'type': 'scada_data' } | new
+    undo_cs = { 'type': 'scada_data' } | old
+
+    return DbChangeSet(redo_sql, undo_sql, [redo_cs], [undo_cs])
+
+
+def set_scada_data(name: str, cs: ChangeSet) -> ChangeSet:
+    result = set_scada_data_cmd(name, cs)
+    result.redo_cs[0] |= g_update_prefix
+    result.undo_cs[0] |= g_update_prefix
+    return execute_command(name, result)
diff --git a/tjnetwork.py b/tjnetwork.py
index 161ab8c..00c9abb 100644
--- a/tjnetwork.py
+++ b/tjnetwork.py
@@ -748,3 +748,18 @@ def add_scada_model(name: str, cs: ChangeSet) -> ChangeSet:
 
 def delete_scada_model(name: str, cs: ChangeSet) -> ChangeSet:
     return api.delete_scada_model(name, cs)
+
+
+############################################################
+# scada_data 29
+############################################################
+
+def get_scada_data_schema(name: str) -> dict[str, dict[str, Any]]:
+    return api.get_scada_data_schema(name)
+
+def get_scada_data(name: str, device_id: str) -> dict[str, Any]:
+    return api.get_scada_data(name, device_id)
+
+# example: set_scada_data(p, ChangeSet({'device_id': 'sm_device', 'data': [{ 'time': '2023-02-10 00:02:22', 'value': 100.0 }, { 'time': '2023-02-10 00:03:22', 'value': 200.0 }]}))
+def set_scada_data(name: str, cs: ChangeSet) -> ChangeSet:
+    return api.set_scada_data(name, cs)