diff --git a/models/bus.go b/models/bus.go
new file mode 100644
index 0000000..53300d7
--- /dev/null
+++ b/models/bus.go
@@ -0,0 +1,31 @@
+package models
+
+import "slices"
+
+// bus model
+type Bus struct {
+	Name    string `json:"name,omitemtpy"`
+	Address []uint `json:"address,omitemtpy"` // address of bus
+	Topic   *Topic `json:"topic,omitemtpy"`   // address of bus
+}
+
+func (b *Bus) AddAddress(address uint) {
+	if !slices.Contains(b.Address, address) {
+		b.Address = append(b.Address, address)
+		slices.Sort(b.Address)
+	}
+}
+
+func (b *Bus) AddSubscription(sub string) {
+	if b.Topic == nil {
+		b.Topic = &Topic{}
+	}
+	b.Topic.AddSubscription(sub)
+}
+
+func (b *Bus) AddPublish(pub string) {
+	if b.Topic == nil {
+		b.Topic = &Topic{}
+	}
+	b.Topic.AddPublish(pub)
+}
diff --git a/models/driver.go b/models/driver.go
new file mode 100644
index 0000000..e107d95
--- /dev/null
+++ b/models/driver.go
@@ -0,0 +1,25 @@
+package models
+
+// driver model
+type Driver struct {
+	Type  string          `json:"type"`  // driver type name of driver in collection
+	Buses map[string]*Bus `json:"buses"` // name of driver bus
+}
+
+func (d *Driver) AddBus(name string) *Bus {
+	if d.Buses == nil {
+		d.Buses = make(map[string]*Bus)
+	}
+	if b, ok := d.Buses[name]; ok {
+		return b
+	}
+	d.Buses[name] = &Bus{Name: name}
+	return d.Buses[name]
+}
+
+func (d *Driver) GetBus(name string) *Bus {
+	if b, ok := d.Buses[name]; ok {
+		return b
+	}
+	return nil
+}
diff --git a/models/drivers.go b/models/drivers.go
index b02fd80..0c55f60 100644
--- a/models/drivers.go
+++ b/models/drivers.go
@@ -3,23 +3,10 @@ package models
 // collection of drivers ordered in map
 type Drivers map[string]*Driver
 
-// driver model
-type Driver struct {
-	Type    string `json:"type,omitempty"` // driver type name of driver in collection
-	Bus     string `json:"bus"`            // name of driver bus
-	Address uint   `json:"address"`        // address of bus
-}
-
-// returns a new collection of drivers
-func NewDrivers() Drivers {
-	return make(Drivers)
-}
-
-// Add new driver to driver collection
-// typ is the name of the driver in driver collection
-func (d *Drivers) AddDriver(typ, bus string, address uint) {
-	(*d)[typ] = &Driver{
-		Bus:     bus,
-		Address: address,
+func (d *Drivers) AddDriver(typ string) *Driver {
+	if drv, ok := (*d)[typ]; ok {
+		return drv
 	}
+	(*d)[typ] = &Driver{Type: typ}
+	return (*d)[typ]
 }
diff --git a/models/set.go b/models/set.go
index 7ed92c6..f02ed2a 100644
--- a/models/set.go
+++ b/models/set.go
@@ -37,10 +37,31 @@ func (s *Set) New(path string, typ Type, value any, rights Rights) {
 }
 
 // sets new driver typ with bus and address
-func (s *Set) NewDriver(typ, bus string, address uint) {
-	s.Driver = &Driver{
-		Type:    typ,
-		Bus:     bus,
-		Address: address,
+func (s *Set) NewDriverAddress(typ, bus string, address uint) {
+	if s.Drivers == nil {
+		s.Drivers = &Drivers{}
 	}
+	drv := s.Drivers.AddDriver(typ)
+	b := drv.AddBus(bus)
+	b.AddAddress(address)
+}
+
+// sets new driver typ with bus and subscription
+func (s *Set) NewDriverSubscribe(typ, bus string, sub string) {
+	if s.Drivers == nil {
+		s.Drivers = &Drivers{}
+	}
+	drv := s.Drivers.AddDriver(typ)
+	b := drv.AddBus(bus)
+	b.AddSubscription(sub)
+}
+
+// sets new driver typ with bus and publish
+func (s *Set) NewDriverPublish(typ, bus string, pub string) {
+	if s.Drivers == nil {
+		s.Drivers = &Drivers{}
+	}
+	drv := s.Drivers.AddDriver(typ)
+	b := drv.AddBus(bus)
+	b.AddPublish(pub)
 }
diff --git a/models/topic.go b/models/topic.go
new file mode 100644
index 0000000..1a6b222
--- /dev/null
+++ b/models/topic.go
@@ -0,0 +1,23 @@
+package models
+
+import "slices"
+
+// topic model
+type Topic struct {
+	Publish   []string `json:"Publish,omitemtpy"`
+	Subscribe []string `json:"subscribe,omitemtpy"`
+}
+
+func (t *Topic) AddSubscription(sub string) {
+	if !slices.Contains(t.Subscribe, sub) {
+		t.Subscribe = append(t.Subscribe, sub)
+		slices.Sort(t.Subscribe)
+	}
+}
+
+func (t *Topic) AddPublish(pub string) {
+	if !slices.Contains(t.Publish, pub) {
+		t.Publish = append(t.Publish, pub)
+		slices.Sort(t.Publish)
+	}
+}