Add UDP, support connection cloning

go.mod

@@ -11,25 +11,25 @@ require (
 	github.com/gorilla/handlers v1.5.2
 	github.com/gorilla/mux v1.8.1
 	github.com/gorilla/websocket v1.5.1
-	github.com/grid-x/modbus v0.0.0-20230713135356-d9fefd3ae5a5
+	github.com/grid-x/modbus v0.0.0-20240429072715-02314cc902aa
 	github.com/influxdata/influxdb-client-go/v2 v2.13.0
 	github.com/spf13/cobra v1.8.0
 	github.com/spf13/pflag v1.0.5
-	github.com/spf13/viper v1.18.1
-	github.com/stretchr/testify v1.8.4
+	github.com/spf13/viper v1.18.2
+	github.com/stretchr/testify v1.9.0
 	github.com/tcnksm/go-latest v0.0.0-20170313132115-e3007ae9052e
-	golang.org/x/exp v0.0.0-20231214170342-aacd6d4b4611
+	golang.org/x/exp v0.0.0-20240416160154-fe59bbe5cc7f
 )
 
 require (
 	github.com/apapsch/go-jsonmerge/v2 v2.0.0 // indirect
-	github.com/cpuguy83/go-md2man/v2 v2.0.3 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.4 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
 	github.com/fsnotify/fsnotify v1.7.0 // indirect
 	github.com/google/go-github v17.0.0+incompatible // indirect
 	github.com/google/go-querystring v1.1.0 // indirect
-	github.com/google/uuid v1.5.0 // indirect
+	github.com/google/uuid v1.6.0 // indirect
 	github.com/grid-x/serial v0.0.0-20211107191517-583c7356b3aa // indirect
 	github.com/hashicorp/go-version v1.6.0 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
@@ -38,9 +38,9 @@ require (
 	github.com/magiconair/properties v1.8.7 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
-	github.com/oapi-codegen/runtime v1.0.0 // indirect
+	github.com/oapi-codegen/runtime v1.1.1 // indirect
 	github.com/pascaldekloe/name v1.0.1 // indirect
-	github.com/pelletier/go-toml/v2 v2.1.1 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.1 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/sagikazarmark/locafero v0.4.0 // indirect
@@ -50,13 +50,15 @@ require (
 	github.com/spf13/cast v1.6.0 // indirect
 	github.com/subosito/gotenv v1.6.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/mod v0.14.0 // indirect
-	golang.org/x/net v0.19.0 // indirect
-	golang.org/x/sync v0.5.0 // indirect
-	golang.org/x/sys v0.15.0 // indirect
+	golang.org/x/mod v0.17.0 // indirect
+	golang.org/x/net v0.24.0 // indirect
+	golang.org/x/sync v0.7.0 // indirect
+	golang.org/x/sys v0.19.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
-	golang.org/x/tools v0.16.1 // indirect
+	golang.org/x/tools v0.20.0 // indirect
 	gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
+
+replace github.com/grid-x/modbus => github.com/evcc-io/modbus v0.0.0-20240419133105-829633e7c6b0

go.sum

@@ -4,8 +4,9 @@ github.com/andig/gosunspec v0.0.0-20231205122018-1daccfa17912/go.mod h1:c6P6szcR
 github.com/apapsch/go-jsonmerge/v2 v2.0.0 h1:axGnT1gRIfimI7gJifB699GoE/oq+F2MU7Dml6nw9rQ=
 github.com/apapsch/go-jsonmerge/v2 v2.0.0/go.mod h1:lvDnEdqiQrp0O42VQGgmlKpxL1AP2+08jFMw88y4klk=
 github.com/bmatcuk/doublestar v1.1.1/go.mod h1:UD6OnuiIn0yFxxA2le/rnRU1G4RaI4UvFv1sNto9p6w=
-github.com/cpuguy83/go-md2man/v2 v2.0.3 h1:qMCsGGgs+MAzDFyp9LpAe1Lqy/fY/qCovCm0qnXZOBM=
 github.com/cpuguy83/go-md2man/v2 v2.0.3/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/cpuguy83/go-md2man/v2 v2.0.4 h1:wfIWP927BUkWJb2NmU/kNDYIBTh/ziUX91+lVfRxZq4=
+github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
@@ -14,6 +15,8 @@ github.com/dmarkham/enumer v1.5.9 h1:NM/1ma/AUNieHZg74w67GkHFBNB15muOt3sj486QVZk
 github.com/dmarkham/enumer v1.5.9/go.mod h1:e4VILe2b1nYK3JKJpRmNdl5xbDQvELc6tQ8b+GsGk6E=
 github.com/eclipse/paho.mqtt.golang v1.4.3 h1:2kwcUGn8seMUfWndX0hGbvH8r7crgcJguQNCyp70xik=
 github.com/eclipse/paho.mqtt.golang v1.4.3/go.mod h1:CSYvoAlsMkhYOXh/oKyxa8EcBci6dVkLCbo5tTC1RIE=
+github.com/evcc-io/modbus v0.0.0-20240419133105-829633e7c6b0 h1:TRyQYvEfiVsQup88bfboOmFy8bPYltAFJfzeS6JcSP4=
+github.com/evcc-io/modbus v0.0.0-20240419133105-829633e7c6b0/go.mod h1:ei49YhPP0v5cVJZAX9k/VdqQakUYNKOEvKB/6vnkZaU=
 github.com/fatih/camelcase v1.0.0/go.mod h1:yN2Sb0lFhZJUdVvtELVWefmrXpuZESvPmqwoZc+/fpc=
 github.com/felixge/httpsnoop v1.0.4 h1:NFTV2Zj1bL4mc9sqWACXbQFVBBg2W3GPvqp8/ESS2Wg=
 github.com/felixge/httpsnoop v1.0.4/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
@@ -29,17 +32,14 @@ github.com/google/go-github v17.0.0+incompatible h1:N0LgJ1j65A7kfXrZnUDaYCs/Sf4r
 github.com/google/go-github v17.0.0+incompatible/go.mod h1:zLgOLi98H3fifZn+44m+umXrS52loVEgC2AApnigrVQ=
 github.com/google/go-querystring v1.1.0 h1:AnCroh3fv4ZBgVIf1Iwtovgjaw/GiKJo8M8yD/fhyJ8=
 github.com/google/go-querystring v1.1.0/go.mod h1:Kcdr2DB4koayq7X8pmAG4sNG59So17icRSOU623lUBU=
-github.com/google/uuid v1.5.0 h1:1p67kYwdtXjb0gL0BPiP1Av9wiZPo5A8z2cWkTZ+eyU=
-github.com/google/uuid v1.5.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gorilla/handlers v1.5.2 h1:cLTUSsNkgcwhgRqvCNmdbRWG0A3N4F+M2nWKdScwyEE=
 github.com/gorilla/handlers v1.5.2/go.mod h1:dX+xVpaxdSw+q0Qek8SSsl3dfMk3jNddUkMzo0GtH0w=
 github.com/gorilla/mux v1.8.1 h1:TuBL49tXwgrFYWhqrNgrUNEY92u81SPhu7sTdzQEiWY=
 github.com/gorilla/mux v1.8.1/go.mod h1:AKf9I4AEqPTmMytcMc0KkNouC66V3BtZ4qD5fmWSiMQ=
 github.com/gorilla/websocket v1.5.1 h1:gmztn0JnHVt9JZquRuzLw3g4wouNVzKL15iLr/zn/QY=
 github.com/gorilla/websocket v1.5.1/go.mod h1:x3kM2JMyaluk02fnUJpQuwD2dCS5NDG2ZHL0uE0tcaY=
-github.com/grid-x/modbus v0.0.0-20210714071042-7af2b65ec03b/go.mod h1:YaK0rKJenZ74vZFcSSLlAQqtG74PMI68eDjpDCDDmTw=
-github.com/grid-x/modbus v0.0.0-20230713135356-d9fefd3ae5a5 h1:yrEpKpnrEPDjgmhAugQG2Og9FV6HMliPjV70NioqP3Y=
-github.com/grid-x/modbus v0.0.0-20230713135356-d9fefd3ae5a5/go.mod h1:qVX2WhsI5xyAoM6I/MV1bXSKBPdLAjp7pCvieO/S0AY=
 github.com/grid-x/serial v0.0.0-20191104121038-e24bc9bf6f08/go.mod h1:kdOd86/VGFWRrtkNwf1MPk0u1gIjc4Y7R2j7nhwc7Rk=
 github.com/grid-x/serial v0.0.0-20211107191517-583c7356b3aa h1:Rsn6ARgNkXrsXJIzhkE4vQr5Gbx2LvtEMv4BJOK4LyU=
 github.com/grid-x/serial v0.0.0-20211107191517-583c7356b3aa/go.mod h1:kdOd86/VGFWRrtkNwf1MPk0u1gIjc4Y7R2j7nhwc7Rk=
@@ -66,12 +66,12 @@ github.com/mitchellh/mapstructure v1.5.0 h1:jeMsZIYE/09sWLaz43PL7Gy6RuMjD2eJVyua
 github.com/mitchellh/mapstructure v1.5.0/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e h1:fD57ERR4JtEqsWbfPhv4DMiApHyliiK5xCTNVSPiaAs=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
-github.com/oapi-codegen/runtime v1.0.0 h1:P4rqFX5fMFWqRzY9M/3YF9+aPSPPB06IzP2P7oOxrWo=
-github.com/oapi-codegen/runtime v1.0.0/go.mod h1:LmCUMQuPB4M/nLXilQXhHw+BLZdDb18B34OO356yJ/A=
+github.com/oapi-codegen/runtime v1.1.1 h1:EXLHh0DXIJnWhdRPN2w4MXAzFyE4CskzhNLUmtpMYro=
+github.com/oapi-codegen/runtime v1.1.1/go.mod h1:SK9X900oXmPWilYR5/WKPzt3Kqxn/uS/+lbpREv+eCg=
 github.com/pascaldekloe/name v1.0.1 h1:9lnXOHeqeHHnWLbKfH6X98+4+ETVqFqxN09UXSjcMb0=
 github.com/pascaldekloe/name v1.0.1/go.mod h1:Z//MfYJnH4jVpQ9wkclwu2I2MkHmXTlT9wR5UZScttM=
-github.com/pelletier/go-toml/v2 v2.1.1 h1:LWAJwfNvjQZCFIDKWYQaM62NcYeYViCmWIwmOStowAI=
-github.com/pelletier/go-toml/v2 v2.1.1/go.mod h1:tJU2Z3ZkXwnxa4DPO899bsyIoywizdUvyaeZurnPPDc=
+github.com/pelletier/go-toml/v2 v2.2.1 h1:9TA9+T8+8CUCO2+WYnDLCgrYi9+omqKXyjDtosvtEhg=
+github.com/pelletier/go-toml/v2 v2.2.1/go.mod h1:1t835xjRzz80PqgE6HHgN2JOsmgYu/h4qDAS4n929Rs=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 h1:Jamvg5psRIccs7FGNTlIRMkT8wgtp5eCXdBlqhYGL6U=
 github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
@@ -93,37 +93,39 @@ github.com/spf13/cobra v1.8.0 h1:7aJaZx1B85qltLMc546zn58BxxfZdR/W22ej9CFoEf0=
 github.com/spf13/cobra v1.8.0/go.mod h1:WXLWApfZ71AjXPya3WOlMsY9yMs7YeiHhFVlvLyhcho=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
-github.com/spf13/viper v1.18.1 h1:rmuU42rScKWlhhJDyXZRKJQHXFX02chSVW1IvkPGiVM=
-github.com/spf13/viper v1.18.1/go.mod h1:EKmWIqdnk5lOcmR72yw6hS+8OPYcwD0jteitLMVB+yk=
+github.com/spf13/viper v1.18.2 h1:LUXCnvUvSM6FXAsj6nnfc8Q2tp1dIgUfY9Kc8GsSOiQ=
+github.com/spf13/viper v1.18.2/go.mod h1:EKmWIqdnk5lOcmR72yw6hS+8OPYcwD0jteitLMVB+yk=
 github.com/spkg/bom v0.0.0-20160624110644-59b7046e48ad/go.mod h1:qLr4V1qq6nMqFKkMo8ZTx3f+BZEkzsRUY10Xsm2mwU0=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/subosito/gotenv v1.6.0 h1:9NlTDc1FTs4qu0DDq7AEtTPNw6SVm7uBMsUCUjABIf8=
 github.com/subosito/gotenv v1.6.0/go.mod h1:Dk4QP5c2W3ibzajGcXpNraDfq2IrhjMIvMSWPKKo0FU=
 github.com/tcnksm/go-latest v0.0.0-20170313132115-e3007ae9052e h1:IWllFTiDjjLIf2oeKxpIUmtiDV5sn71VgeQgg6vcE7k=
 github.com/tcnksm/go-latest v0.0.0-20170313132115-e3007ae9052e/go.mod h1:d7u6HkTYKSv5m6MCKkOQlHwaShTMl3HjqSGW3XtVhXM=
 go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
 go.uber.org/multierr v1.11.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
-golang.org/x/exp v0.0.0-20231214170342-aacd6d4b4611 h1:qCEDpW1G+vcj3Y7Fy52pEM1AWm3abj8WimGYejI3SC4=
-golang.org/x/exp v0.0.0-20231214170342-aacd6d4b4611/go.mod h1:iRJReGqOEeBhDZGkGbynYwcHlctCvnjTYIamk7uXpHI=
-golang.org/x/mod v0.14.0 h1:dGoOF9QVLYng8IHTm7BAyWqCqSheQ5pYWGhzW00YJr0=
-golang.org/x/mod v0.14.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
-golang.org/x/net v0.19.0 h1:zTwKpTd2XuCqf8huc7Fo2iSy+4RHPd10s4KzeTnVr1c=
-golang.org/x/net v0.19.0/go.mod h1:CfAk/cbD4CthTvqiEl8NpboMuiuOYsAr/7NOjZJtv1U=
-golang.org/x/sync v0.5.0 h1:60k92dhOjHxJkrqnwsfl8KuaHbn/5dl0lUPUklKo3qE=
-golang.org/x/sync v0.5.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc=
-golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/exp v0.0.0-20240416160154-fe59bbe5cc7f h1:99ci1mjWVBWwJiEKYY6jWa4d2nTQVIEhZIptnrVb1XY=
+golang.org/x/exp v0.0.0-20240416160154-fe59bbe5cc7f/go.mod h1:/lliqkxwWAhPjf5oSOIJup2XcqJaw8RGS6k3TGEc7GI=
+golang.org/x/mod v0.17.0 h1:zY54UmvipHiNd+pm+m0x9KhZ9hl1/7QNMyxXbc6ICqA=
+golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+golang.org/x/net v0.24.0 h1:1PcaxkF854Fu3+lvBIx5SYn9wRlBzzcnHZSiaFFAb0w=
+golang.org/x/net v0.24.0/go.mod h1:2Q7sJY5mzlzWjKtYUEXSlBWCdyaioyXzRB2RtU8KVE8=
+golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
+golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sys v0.19.0 h1:q5f1RH2jigJ1MoAWp2KTp3gm5zAGFUTarQZ5U386+4o=
+golang.org/x/sys v0.19.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
-golang.org/x/tools v0.16.1 h1:TLyB3WofjdOEepBHAU20JdNC1Zbg87elYofWYAY5oZA=
-golang.org/x/tools v0.16.1/go.mod h1:kYVVN6I1mBNoB1OX+noeBjbRk4IUEPa7JJ+TJMEooJ0=
+golang.org/x/tools v0.20.0 h1:hz/CVckiOxybQvFw6h7b/q80NTr9IUQb4s1IIzW7KNY=
+golang.org/x/tools v0.20.0/go.mod h1:WvitBU7JJf6A4jOdg4S1tviW9bhUxkgeCui/0JHctQg=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b h1:QRR6H1YWRnHb4Y/HeNFCTJLFVxaq6wH4YuVdsUOr75U=

meters/ascii.go

@@ -10,7 +10,6 @@ import (
 
 // ASCII is an ASCII modbus connection
 type ASCII struct {
-	device  string
 	Client  modbus.Client
 	Handler *modbus.ASCIIClientHandler
 	prevID  uint8
@@ -45,7 +44,6 @@ func NewASCII(device string, baudrate int, comset string) Connection {
 	client := modbus.NewClient(handler)
 
 	b := &ASCII{
-		device:  device,
 		Client:  client,
 		Handler: handler,
 	}
@@ -55,7 +53,7 @@ func NewASCII(device string, baudrate int, comset string) Connection {
 
 // String returns the bus device
 func (b *ASCII) String() string {
-	return b.device
+	return b.Handler.Address
 }
 
 // ModbusClient returns the RTU modbus client
@@ -96,3 +94,14 @@ func (b *ASCII) ConnectDelay(delay time.Duration) {
 func (b *ASCII) Close() {
 	b.Handler.Close()
 }
+
+// Clone clones the modbus connection.
+func (b *ASCII) Clone(deviceID byte) Connection {
+	handler := b.Handler.Clone()
+	handler.SetSlave(deviceID)
+
+	return &ASCII{
+		Client:  modbus.NewClient(handler),
+		Handler: handler,
+	}
+}

meters/asciiovertcp.go

@@ -8,7 +8,6 @@ import (
 
 // ASCIIOverTCP is an ASCII encoder over a TCP modbus connection
 type ASCIIOverTCP struct {
-	address string
 	Client  modbus.Client
 	Handler *modbus.ASCIIOverTCPClientHandler
 	prevID  uint8
@@ -31,7 +30,6 @@ func NewASCIIOverTCP(address string) Connection {
 	client := modbus.NewClient(handler)
 
 	b := &ASCIIOverTCP{
-		address: address,
 		Client:  client,
 		Handler: handler,
 	}
@@ -41,7 +39,7 @@ func NewASCIIOverTCP(address string) Connection {
 
 // String returns the bus connection address (TCP)
 func (b *ASCIIOverTCP) String() string {
-	return b.address
+	return b.Handler.Address
 }
 
 // ModbusClient returns the TCP modbus client
@@ -82,3 +80,14 @@ func (b *ASCIIOverTCP) ConnectDelay(delay time.Duration) {
 func (b *ASCIIOverTCP) Close() {
 	b.Handler.Close()
 }
+
+// Clone clones the modbus connection.
+func (b *ASCIIOverTCP) Clone(deviceID byte) Connection {
+	handler := b.Handler.Clone()
+	handler.SetSlave(deviceID)
+
+	return &ASCIIOverTCP{
+		Client:  modbus.NewClient(handler),
+		Handler: handler,
+	}
+}

meters/connection.go

@@ -24,6 +24,9 @@ type Connection interface {
 	// This forces the modbus client to reopen the connection before the next bus operations.
 	Close()
 
+	// Clone clones the modbus connection, keeping the underlying transport.
+	Clone(deviceID byte) Connection
+
 	// Logger sets a logging instance for physical bus operations
 	Logger(l Logger)
 

meters/mock.go

@@ -45,7 +45,7 @@ func (b *Mock) Logger(l Logger) {
 }
 
 // Slave sets the modbus device id for the following operations
-func (b *Mock) Slave(deviceID uint8) {
+func (b *Mock) Slave(_ uint8) {
 }
 
 // Timeout sets the modbus timeout
@@ -54,14 +54,18 @@ func (b *Mock) Timeout(timeout time.Duration) time.Duration {
 }
 
 // ConnectDelay sets the the initial delay after connecting before starting communication
-func (b *Mock) ConnectDelay(delay time.Duration) {
-	// nop
+func (b *Mock) ConnectDelay(_ time.Duration) {
 }
 
 // Close closes the modbus connection.
 func (b *Mock) Close() {
 }
 
+// Clone clones the modbus connection.
+func (b *Mock) Clone(_ byte) Connection {
+	return b
+}
+
 // MockClient is a mock modbus client for testing that
 // is able to simulate devices and errors
 type MockClient struct {

meters/rtu.go

@@ -10,7 +10,6 @@ import (
 
 // RTU is an RTU modbus connection
 type RTU struct {
-	device  string
 	Client  modbus.Client
 	Handler *modbus.RTUClientHandler
 	prevID  uint8
@@ -45,7 +44,6 @@ func NewRTU(device string, baudrate int, comset string) Connection {
 	client := modbus.NewClient(handler)
 
 	b := &RTU{
-		device:  device,
 		Client:  client,
 		Handler: handler,
 	}
@@ -55,7 +53,7 @@ func NewRTU(device string, baudrate int, comset string) Connection {
 
 // String returns the bus device
 func (b *RTU) String() string {
-	return b.device
+	return b.Handler.Address
 }
 
 // ModbusClient returns the RTU modbus client
@@ -95,3 +93,14 @@ func (b *RTU) ConnectDelay(delay time.Duration) {
 func (b *RTU) Close() {
 	b.Handler.Close()
 }
+
+// Clone clones the modbus connection.
+func (b *RTU) Clone(deviceID byte) Connection {
+	handler := b.Handler.Clone()
+	handler.SetSlave(deviceID)
+
+	return &RTU{
+		Client:  modbus.NewClient(handler),
+		Handler: handler,
+	}
+}

meters/rtuovertcp.go

@@ -8,7 +8,6 @@ import (
 
 // RTUOverTCP is a RTU encoder over a TCP modbus connection
 type RTUOverTCP struct {
-	address string
 	Client  modbus.Client
 	Handler *modbus.RTUOverTCPClientHandler
 	prevID  uint8
@@ -31,7 +30,6 @@ func NewRTUOverTCP(address string) Connection {
 	client := modbus.NewClient(handler)
 
 	b := &RTUOverTCP{
-		address: address,
 		Client:  client,
 		Handler: handler,
 	}
@@ -41,7 +39,7 @@ func NewRTUOverTCP(address string) Connection {
 
 // String returns the bus connection address (TCP)
 func (b *RTUOverTCP) String() string {
-	return b.address
+	return b.Handler.Address
 }
 
 // ModbusClient returns the TCP modbus client
@@ -82,3 +80,14 @@ func (b *RTUOverTCP) ConnectDelay(delay time.Duration) {
 func (b *RTUOverTCP) Close() {
 	b.Handler.Close()
 }
+
+// Clone clones the modbus connection.
+func (b *RTUOverTCP) Clone(deviceID byte) Connection {
+	handler := b.Handler.Clone()
+	handler.SetSlave(deviceID)
+
+	return &RTUOverTCP{
+		Client:  modbus.NewClient(handler),
+		Handler: handler,
+	}
+}