diff --git a/connect/messager.go b/connect/messager.go
index 7a855e6..3255164 100644
--- a/connect/messager.go
+++ b/connect/messager.go
@@ -7,7 +7,8 @@ import (
 )
 
 type Messenger struct {
-	Tunnel  Tunnel
+	Conn
+
 	Timeout time.Duration
 
 	mu sync.Mutex
@@ -17,21 +18,21 @@ func (m *Messenger) Ask(request []byte, response []byte) (int, error) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 
-	//s := bufio.NewReader(m.Tunnel)
+	//s := bufio.NewReader(m.Conn)
 
 	//先写
-	_, err := m.Tunnel.Write(request)
+	_, err := m.Conn.Write(request)
 	if err != nil {
 		return 0, err
 	}
 
 	//读超时
-	err = m.Tunnel.SetReadTimeout(m.Timeout)
+	err = m.Conn.SetReadTimeout(m.Timeout)
 	if err != nil {
 		return 0, err
 	}
 
-	return m.Tunnel.Read(response)
+	return m.Conn.Read(response)
 }
 
 func (m *Messenger) AskAtLeast(request []byte, response []byte, min int) (int, error) {
@@ -39,18 +40,18 @@ func (m *Messenger) AskAtLeast(request []byte, response []byte, min int) (int, e
 	defer m.mu.Unlock()
 
 	//先写
-	_, err := m.Tunnel.Write(request)
+	_, err := m.Conn.Write(request)
 	if err != nil {
 		return 0, err
 	}
 
 	//读超时
-	err = m.Tunnel.SetReadTimeout(m.Timeout)
+	err = m.Conn.SetReadTimeout(m.Timeout)
 	if err != nil {
 		return 0, err
 	}
 
-	return io.ReadAtLeast(m.Tunnel, response, min)
+	return io.ReadAtLeast(m.Conn, response, min)
 }
 
 func (m *Messenger) Read(response []byte) (int, error) {
@@ -58,12 +59,12 @@ func (m *Messenger) Read(response []byte) (int, error) {
 	defer m.mu.Unlock()
 
 	//读超时
-	err := m.Tunnel.SetReadTimeout(m.Timeout)
+	err := m.Conn.SetReadTimeout(m.Timeout)
 	if err != nil {
 		return 0, err
 	}
 	//读
-	return m.Tunnel.Read(response)
+	return m.Conn.Read(response)
 }
 
 func (m *Messenger) ReadAtLeast(response []byte, min int) (int, error) {
@@ -71,10 +72,10 @@ func (m *Messenger) ReadAtLeast(response []byte, min int) (int, error) {
 	defer m.mu.Unlock()
 
 	//读超时
-	err := m.Tunnel.SetReadTimeout(m.Timeout)
+	err := m.Conn.SetReadTimeout(m.Timeout)
 	if err != nil {
 		return 0, err
 	}
 
-	return io.ReadAtLeast(m.Tunnel, response, min)
+	return io.ReadAtLeast(m.Conn, response, min)
 }
diff --git a/connect/tunnel.go b/connect/tunnel.go
index 6462de5..5c3e96d 100644
--- a/connect/tunnel.go
+++ b/connect/tunnel.go
@@ -8,9 +8,5 @@ type Tunnel interface {
 
 	Open() error
 
-	Close() error
-
-	Available() bool
-
 	//Online() bool
 }
diff --git a/modbus/adapter.go b/modbus/adapter.go
index c916cd6..e96143a 100644
--- a/modbus/adapter.go
+++ b/modbus/adapter.go
@@ -3,12 +3,10 @@ package modbus
 import (
 	"errors"
 	"github.com/god-jason/bucket/types"
-	"github.com/zgwit/iot-gateway/connect"
 	"github.com/zgwit/iot-gateway/product"
 )
 
 type Adapter struct {
-	tunnel connect.Tunnel
 	modbus Modbus
 
 	//device=>product_id
@@ -20,10 +18,6 @@ type Adapter struct {
 	pollers map[string]*[]*Poller
 }
 
-func (adapter *Adapter) Tunnel() connect.Tunnel {
-	return adapter.tunnel
-}
-
 func (adapter *Adapter) Mount(id string, product_id string, station types.Options) (err error) {
 	adapter.devices[id] = product_id
 	adapter.stations[id] = station
diff --git a/modbus/modbus-rtu.go b/modbus/modbus-rtu.go
index bed9bce..ce50fd8 100644
--- a/modbus/modbus-rtu.go
+++ b/modbus/modbus-rtu.go
@@ -15,11 +15,11 @@ type RTU struct {
 	buf       []byte
 }
 
-func NewRTU(tunnel connect.Tunnel, opts types.Options) *RTU {
+func NewRTU(conn connect.Conn, opts types.Options) *RTU {
 	rtu := &RTU{
 		messenger: connect.Messenger{
 			Timeout: time.Millisecond * time.Duration(opts.Int64("timeout", 1000)),
-			Tunnel:  tunnel,
+			Conn:    conn,
 		},
 		buf: make([]byte, opts.Int("buffer", 256)),
 	}
diff --git a/modbus/modbus-tcp.go b/modbus/modbus-tcp.go
index 63cfa6a..d964f28 100644
--- a/modbus/modbus-tcp.go
+++ b/modbus/modbus-tcp.go
@@ -15,11 +15,11 @@ type TCP struct {
 	buf       []byte
 }
 
-func NewTCP(tunnel connect.Tunnel, opts types.Options) *TCP {
+func NewTCP(conn connect.Conn, opts types.Options) *TCP {
 	tcp := &TCP{
 		messenger: connect.Messenger{
 			Timeout: time.Millisecond * time.Duration(opts.Int64("timeout", 1000)),
-			Tunnel:  tunnel,
+			Conn:    conn,
 		},
 		buf: make([]byte, opts.Int("buffer", 256)),
 	}
diff --git a/modbus/modbus.go b/modbus/modbus.go
index b139274..7b9e724 100644
--- a/modbus/modbus.go
+++ b/modbus/modbus.go
@@ -70,9 +70,8 @@ var stationForm = []types.SmartField{
 var modbusRtu = &protocol.Protocol{
 	Name:  "modbus-rtu",
 	Label: "Modbus RTU",
-	Factory: func(conn connect.Tunnel, opts map[string]any) protocol.Adapter {
+	Factory: func(conn connect.Conn, opts map[string]any) protocol.Adapter {
 		return &Adapter{
-			tunnel:   conn,
 			modbus:   NewRTU(conn, opts),
 			devices:  make(map[string]string),
 			stations: make(map[string]types.Options),
@@ -89,9 +88,8 @@ var modbusRtu = &protocol.Protocol{
 var modbusTCP = &protocol.Protocol{
 	Name:  "modbus-tcp",
 	Label: "Modbus TCP",
-	Factory: func(conn connect.Tunnel, opts map[string]any) protocol.Adapter {
+	Factory: func(conn connect.Conn, opts map[string]any) protocol.Adapter {
 		return &Adapter{
-			tunnel:   conn,
 			modbus:   NewTCP(conn, opts),
 			devices:  make(map[string]string),
 			stations: make(map[string]types.Options),
diff --git a/protocol/adapter.go b/protocol/adapter.go
index 95a6fc2..dd05ae0 100644
--- a/protocol/adapter.go
+++ b/protocol/adapter.go
@@ -2,11 +2,10 @@ package protocol
 
 import (
 	"github.com/god-jason/bucket/types"
-	"github.com/zgwit/iot-gateway/connect"
 )
 
 type Adapter interface {
-	Tunnel() connect.Tunnel
+	//Tunnel() connect.Tunnel
 
 	//设备动态添加
 	Mount(device string, product string, station types.Options) error
diff --git a/protocol/config.go b/protocol/config.go
new file mode 100644
index 0000000..2d0eaff
--- /dev/null
+++ b/protocol/config.go
@@ -0,0 +1 @@
+package protocol
diff --git a/protocol/protocol.go b/protocol/protocol.go
index f69e21a..b6707bd 100644
--- a/protocol/protocol.go
+++ b/protocol/protocol.go
@@ -5,7 +5,7 @@ import (
 	"github.com/zgwit/iot-gateway/connect"
 )
 
-type Factory func(conn connect.Tunnel, opts map[string]any) Adapter
+type Factory func(conn connect.Conn, opts map[string]any) Adapter
 
 type Protocol struct {
 	Name    string  `json:"name"`
diff --git a/tunnel/tunnel.go b/tunnel/tunnel.go
index a6d61cc..536bf38 100644
--- a/tunnel/tunnel.go
+++ b/tunnel/tunnel.go
@@ -65,10 +65,6 @@ func (l *Tunnel) ID() string {
 	return l.Id
 }
 
-func (l *Tunnel) Available() bool {
-	return l.Running
-}
-
 func (l *Tunnel) Keep(open func() error) {
 	if l.keeping {
 		return