diff --git a/api/forms/module_form.py b/api/forms/module_form.py
index 514e207..94ace9f 100644
--- a/api/forms/module_form.py
+++ b/api/forms/module_form.py
@@ -10,5 +10,5 @@ class ModuleSetValueForm(FlaskForm):
             UUID(message='Hodnota nie je vo formáte UUID.')
         ]
     )
-    data_point = StringField('data_point', validators=[DataRequired(message='Hodnota data_point je povinná.')])
+    datapoint = StringField('data_point', validators=[DataRequired(message='Hodnota datapoint je povinná.')])
     value = StringField('value', validators=[DataRequired(message='Hodnota value je povinná.')])
diff --git a/api/routes.py b/api/routes.py
index 075f4ab..8b7d091 100644
--- a/api/routes.py
+++ b/api/routes.py
@@ -178,11 +178,15 @@ def set_value_module(module_id):
         raise ApiException('Daný modul sa nepodarilo nájsť.', status_code=http_status.HTTP_404_NOT_FOUND)
 
     device = module.devices.filter_by(id=data.get('device_id')).first()
+    del data['device_id']
     if not device:
         raise ApiException('Dané zariadenie sa nepodarilo nájsť.', status_code=http_status.HTTP_404_NOT_FOUND)
 
-    data['device_uuid'] = data['device_id']
-    del data['device_id']
+    datapoint = module.module_device_type.device_type_datapoints.filter_by(code=data.get('datapoint')).first()
+    if not datapoint:
+        raise ApiException('Daný datapoint sa nepodarilo nájsť.', status_code=http_status.HTTP_404_NOT_FOUND)
+
+    data['device_uuid'] = str(device.uuid)
 
     # TODO: Ziskat sequence number (odniekial)
     data['sequence_number'] = 123
diff --git a/core/models/module_device_type.py b/core/models/module_device_type.py
index 7b8f91a..360e16d 100644
--- a/core/models/module_device_type.py
+++ b/core/models/module_device_type.py
@@ -11,7 +11,7 @@ class ModuleDeviceType(StandardModel):
     code = db.Column(db.String(100), nullable=True)
     protocol_id = db.Column(UUID(as_uuid=True), db.ForeignKey('protocols.id'))
 
-    device_type_datapoints = db.relationship("DeviceTypeDatapoint", back_populates="module_device_type")
+    device_type_datapoints = db.relationship("DeviceTypeDatapoint", lazy='dynamic', back_populates="module_device_type")
     protocol = db.relationship("Protocol", back_populates="module_device_types")
     modules = db.relationship("Module", back_populates="module_device_type")