适配继电器空的情况

internal/server.go

@@ -109,11 +109,14 @@ func Run() {
 	tts.DefaultTTS = tts.New(ctx, config.C.Aliyun)
 
 	// 构建继电器对象
-	r, err := relay.New(config.C.Relay)
+	var r relay.Relay
+	if config.C.Relay != "" {
+		r, err = relay.New(config.C.Relay)
 		if err != nil {
-		zap.S().Panicln("串口连接异常: ", err)
+			zap.S().Panicln("继电器连接异常: ", err)
 		}
 		defer r.Close()
+	}
 
 	// 构建全局设备变量
 	device := common.DefaultDevice(ctx, publishTopic)
@@ -127,7 +130,7 @@ func Run() {
 		middleware.DeviceLock(device),
 		middleware.EmergencyStop(common.GlobalStopper),
 		middleware.SoundStart(),
-		middleware.RelayMaster(nil),
+		middleware.RelayMaster(r),
 		middleware.TimeoutOver(config.C.MaxTimeout),
 		middleware.TickerAction(),
 		middleware.PlayBgm(),

pkg/relay/relay.go

@@ -2,6 +2,7 @@ package relay
 
 import (
 	"github.com/grid-x/modbus"
+	"go.uber.org/zap"
 	"io"
 )
 
@@ -53,6 +54,8 @@ func (r *device) Off(num int) error {
 }
 
 func New(address string) (Relay, error) {
+	zap.S().Infoln("连接继电器: ", address)
+
 	h := modbus.NewRTUClientHandler(address)
 	h.SlaveID = 1
 	h.BaudRate = 9600