How to use session method of mqtt Package

Best Venom code snippet using mqtt.session

main.go

Source:main.go Github

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...10 "github.com/eclipse/paho.mqtt.golang"11 "golang.org/x/sys/unix"12)13var (14 sessionLock sync.Mutex15 carInfo *leaf.VehicleInfo16 carBattery *leaf.BatteryRecords17 carBatteryLock sync.Mutex18 carTemperature *leaf.TemperatureRecords19 carTemperatureLock sync.Mutex20 carLocation *leaf.Location21 carLocationLock sync.Mutex22 carHVAC bool23 carHVACExpiry time.Time24 carHVACLock sync.Mutex25 carHVACReady bool26 mqttBinaryTopic string27 mqttSensorTopic string28 mqttSwitchTopic string29 mqttTrackerTopic string30)31func main() {32 log.SetOutput(os.Stdout)33 err := run()34 if err != nil {35 fmt.Printf("Error: %v\n", err)36 os.Exit(1)37 }38}39func run() error {40 // Setup error handling for background Go routines.41 chError := make(chan error, 0)42 // Setup MQTT connection details.43 mqttOpts := mqtt.NewClientOptions()44 mqttOpts.AddBroker(os.Getenv("MQTT_HOST"))45 mqttOpts.SetClientID("leaf2mqtt")46 mqttOpts.SetUsername(os.Getenv("MQTT_USERNAME"))47 mqttOpts.SetPassword(os.Getenv("MQTT_PASSWORD"))48 mqttOpts.SetAutoReconnect(true)49 mqttOpts.SetCleanSession(false)50 mqttSession := mqtt.NewClient(mqttOpts)51 if token := mqttSession.Connect(); token.Wait() && token.Error() != nil {52 return token.Error()53 }54 // Setup Nissan connection details.55 leafSession := &leaf.Session{56 Username: os.Getenv("LEAF_USERNAME"),57 Password: os.Getenv("LEAF_PASSWORD"),58 Country: os.Getenv("LEAF_COUNTRY"),59 }60 // Login.61 info, _, _, err := leafSession.Login()62 if err != nil {63 return err64 }65 carInfo = info66 mqttBinaryTopic = fmt.Sprintf("homeassistant/binary_sensor/leaf2mqtt_%s", carInfo.VIN)67 mqttTrackerTopic = fmt.Sprintf("homeassistant/device_tracker/leaf2mqtt_%s", carInfo.VIN)68 mqttSensorTopic = fmt.Sprintf("homeassistant/sensor/leaf2mqtt_%s", carInfo.VIN)69 mqttSwitchTopic = fmt.Sprintf("homeassistant/switch/leaf2mqtt_%s", carInfo.VIN)70 // Create the MQTT location topics.71 data := fmt.Sprintf(`{72 "name": "%s (location)",73 "state_topic": "%s/location/state",74 "payload_home": "home",75 "payload_not_home": "not_home",76 "json_attributes_topic": "%s/location/attributes",77 "icon": "mdi:car",78 "source_type": "gps"79}`, carInfo.VIN, mqttTrackerTopic, mqttTrackerTopic)80 if token := mqttSession.Publish(fmt.Sprintf("%s/location/config", mqttTrackerTopic), 0, true, data); token.Wait() && token.Error() != nil {81 return token.Error()82 }83 if token := mqttSession.Publish(fmt.Sprintf("%s/location/state", mqttTrackerTopic), 0, true, "not_home"); token.Wait() && token.Error() != nil {84 return token.Error()85 }86 // Create the MQTT battery topics.87 data = fmt.Sprintf(`{88 "name": "%s (charge)",89 "state_topic": "%s/charge/state",90 "device_class": "battery",91 "unit_of_measurement": "%%"92}`, carInfo.VIN, mqttSensorTopic)93 if token := mqttSession.Publish(fmt.Sprintf("%s/charge/config", mqttSensorTopic), 0, true, data); token.Wait() && token.Error() != nil {94 return token.Error()95 }96 data = fmt.Sprintf(`{97 "name": "%s (plugged)",98 "state_topic": "%s/plugged/state",99 "payload_on": "on",100 "payload_off": "off",101 "device_class": "plug"102}`, carInfo.VIN, mqttBinaryTopic)103 if token := mqttSession.Publish(fmt.Sprintf("%s/plugged/config", mqttBinaryTopic), 0, true, data); token.Wait() && token.Error() != nil {104 return token.Error()105 }106 data = fmt.Sprintf(`{107 "name": "%s (charging)",108 "state_topic": "%s/charging/state",109 "payload_on": "on",110 "payload_off": "off",111 "device_class": "battery_charging"112}`, carInfo.VIN, mqttBinaryTopic)113 if token := mqttSession.Publish(fmt.Sprintf("%s/charging/config", mqttBinaryTopic), 0, true, data); token.Wait() && token.Error() != nil {114 return token.Error()115 }116 // Create the MQTT range topics117 data = fmt.Sprintf(`{118 "name": "%s (range with AC)",119 "state_topic": "%s/range_ac/state",120 "unit_of_measurement": "km"121}`, carInfo.VIN, mqttSensorTopic)122 if token := mqttSession.Publish(fmt.Sprintf("%s/range_ac/config", mqttSensorTopic), 0, true, data); token.Wait() && token.Error() != nil {123 return token.Error()124 }125 data = fmt.Sprintf(`{126 "name": "%s (range without AC)",127 "state_topic": "%s/range_noac/state",128 "unit_of_measurement": "km"129}`, carInfo.VIN, mqttSensorTopic)130 if token := mqttSession.Publish(fmt.Sprintf("%s/range_noac/config", mqttSensorTopic), 0, true, data); token.Wait() && token.Error() != nil {131 return token.Error()132 }133 // Create the MQTT temperature topics.134 data = fmt.Sprintf(`{135 "name": "%s (temperature)",136 "state_topic": "%s/temperature/state",137 "device_class": "temperature",138 "unit_of_measurement": "C"139}`, carInfo.VIN, mqttSensorTopic)140 if token := mqttSession.Publish(fmt.Sprintf("%s/temperature/config", mqttSensorTopic), 0, true, data); token.Wait() && token.Error() != nil {141 return token.Error()142 }143 // Create the MQTT climate topics.144 data = fmt.Sprintf(`{145 "name": "%s (climate)",146 "state_topic": "%s/climate/state",147 "command_topic": "%s/climate/set",148 "payload_on": "on",149 "payload_off": "off",150 "retain": true,151 "state_on": "on",152 "state_off": "off"153}`, carInfo.VIN, mqttSwitchTopic, mqttSwitchTopic)154 if token := mqttSession.Publish(fmt.Sprintf("%s/climate/config", mqttSwitchTopic), 0, true, data); token.Wait() && token.Error() != nil {155 return token.Error()156 }157 if token := mqttSession.Publish(fmt.Sprintf("%s/climate/state", mqttSwitchTopic), 0, true, "off"); token.Wait() && token.Error() != nil {158 return token.Error()159 }160 callback := func(client mqtt.Client, msg mqtt.Message) {161 mqttClimateSet(leafSession, client, msg, chError)162 }163 if token := mqttSession.Subscribe(fmt.Sprintf("%s/climate/set", mqttSwitchTopic), 0, callback); token.Wait() && token.Error() != nil {164 return token.Error()165 }166 // Start the goroutines167 go updateBattery(leafSession, mqttSession, chError)168 go updateLocation(leafSession, mqttSession, chError)169 go printStatus(leafSession, mqttSession, chError)170 go signalHandling(leafSession, chError)171 return <-chError172}173func mqttClimateSet(session *leaf.Session, mqttSession mqtt.Client, msg mqtt.Message, chError chan error) {174 value := msg.Payload()175 if !carHVACReady {176 carHVACReady = true177 log.Printf("[climate] Skipping initial request")178 return179 }180 if string(value) == "on" {181 err := turnClimateOn(session)182 if err == nil {183 if token := mqttSession.Publish(fmt.Sprintf("%s/climate/state", mqttSwitchTopic), 0, true, "on"); token.Wait() && token.Error() != nil {184 log.Printf("[climate] Failed to update MQTT: %v", token.Error())185 return186 }187 }188 } else if string(value) == "off" {189 err := turnClimateOff(session)190 if err == nil {191 if token := mqttSession.Publish(fmt.Sprintf("%s/climate/state", mqttSwitchTopic), 0, true, "off"); token.Wait() && token.Error() != nil {192 log.Printf("[climate] Failed to update MQTT: %v", token.Error())193 return194 }195 }196 } else {197 log.Printf("[climate] Invalid climate state: %v", value)198 }199}200func turnClimateOn(session *leaf.Session) error {201 log.Printf("[climate] Turning HVAC on")202 carHVACLock.Lock()203 defer carHVACLock.Unlock()204 if carHVAC {205 // Reset by attempting to turn off first.206 sessionLock.Lock()207 session.ClimateOff()208 sessionLock.Unlock()209 }210 sessionLock.Lock()211 err := session.ClimateOn()212 sessionLock.Unlock()213 if err != nil {214 log.Printf("[climate] Failed to turn on: %v", err)215 return err216 }217 carHVAC = true218 carHVACExpiry = time.Now().Add(15*time.Minute)219 log.Printf("[climate] Turned HVAC on")220 return nil221}222func turnClimateOff(session *leaf.Session) error {223 log.Printf("[climate] Turning HVAC off")224 carHVACLock.Lock()225 defer carHVACLock.Unlock()226 sessionLock.Lock()227 err := session.ClimateOff()228 sessionLock.Unlock()229 if err != nil {230 log.Printf("[climate] Failed to turn off: %v", err)231 return err232 }233 carHVAC = false234 log.Printf("[climate] Turned HVAC off")235 return nil236}237func signalHandling(session *leaf.Session, chError chan error) {238 sigs := make(chan os.Signal, 1)239 signal.Notify(sigs, unix.SIGUSR1, unix.SIGUSR2)240 for {241 sig := <-sigs242 // Turn on the HVAC system.243 if sig == unix.SIGUSR1 {244 turnClimateOn(session)245 }246 // Turn off the HVAC system.247 if sig == unix.SIGUSR2 {248 turnClimateOff(session)249 }250 }251}252func printStatus(session *leaf.Session, mqttSession mqtt.Client, chError chan error) {253 printCurrent := func() {254 carBatteryLock.Lock()255 carLocationLock.Lock()256 carTemperatureLock.Lock()257 carHVACLock.Lock()258 defer carBatteryLock.Unlock()259 defer carLocationLock.Unlock()260 defer carTemperatureLock.Unlock()261 defer carHVACLock.Unlock()262 log.Printf("[info] Start of status update")263 log.Printf("Car information:")264 log.Printf(" Name: %s", carInfo.Nickname)265 log.Printf(" VIN: %s", carInfo.VIN)266 if carBattery != nil {267 hvacState := "off"268 if carHVAC {269 if carBattery.BatteryStatus.BatteryChargingStatus.IsCharging() {270 hvacState = "on"271 } else if carHVACExpiry.After(time.Now()) {272 hvacState = fmt.Sprintf("on (%s remaining)", time.Until(carHVACExpiry))273 }274 if hvacState == "off" {275 carHVAC = false276 if token := mqttSession.Publish(fmt.Sprintf("%s/climate/state", mqttSwitchTopic), 0, true, "off"); token.Wait() && token.Error() != nil {277 log.Printf("[climate] Failed to update MQTT: %v", token.Error())278 }279 }280 }281 log.Printf("Battery:")282 log.Printf(" Last update: %s", carBattery.LastUpdatedDateAndTime)283 log.Printf(" Plugged: %s", carBattery.PluginState)284 log.Printf(" Charging: %s", carBattery.BatteryStatus.BatteryChargingStatus)285 log.Printf(" Capacity: %d%%", carBattery.BatteryStatus.BatteryRemainingAmount)286 log.Printf("Range:")287 log.Printf(" With HVAC: %.0fkm", carBattery.CruisingRangeACOn/1000)288 log.Printf(" Without HVAC: %.0fkm", carBattery.CruisingRangeACOff/1000)289 log.Printf("Climate:")290 log.Printf(" HVAC: %s", hvacState)291 log.Printf(" Inside temperature: %sC", carTemperature.Temperature)292 }293 if carLocation != nil {294 log.Printf("Location:")295 log.Printf(" Last update: %s", carLocation.ReceivedDate)296 log.Printf(" Latitude: %s", carLocation.Latitude)297 log.Printf(" Longitude: %s", carLocation.Longitude)298 }299 log.Printf("[info] End of status update")300 }301 for {302 printCurrent()303 time.Sleep(2*time.Minute)304 }305}306func updateBattery(session *leaf.Session, mqttSession mqtt.Client, chError chan error) {307 for {308 sessionLock.Lock()309 retBattery, retTemperature, err := session.ChargingStatus()310 sessionLock.Unlock()311 if err != nil {312 log.Printf("[battery] Failed, retrying in 5 minutes: %v", err)313 sessionLock.Lock()314 for {315 _, _, _, err := session.Login()316 if err != nil {317 log.Printf("[battery] Failed login, retrying in 15s: %v", err)318 time.Sleep(15*time.Second)319 continue320 }321 break322 }323 sessionLock.Unlock()324 time.Sleep(5*time.Minute)325 continue326 }327 carBatteryLock.Lock()328 carBattery = retBattery329 carBatteryLock.Unlock()330 carTemperatureLock.Lock()331 carTemperature = retTemperature332 carTemperatureLock.Unlock()333 // MQTT charge update.334 if token := mqttSession.Publish(fmt.Sprintf("%s/charge/state", mqttSensorTopic), 0, true, fmt.Sprintf("%d", retBattery.BatteryStatus.BatteryRemainingAmount)); token.Wait() && token.Error() != nil {335 log.Printf("[battery] Failed to update MQTT: %v", token.Error())336 }337 // MQTT range update.338 if token := mqttSession.Publish(fmt.Sprintf("%s/range_ac/state", mqttSensorTopic), 0, true, fmt.Sprintf("%.0f", retBattery.CruisingRangeACOn/1000)); token.Wait() && token.Error() != nil {339 log.Printf("[battery] Failed to update MQTT: %v", token.Error())340 }341 if token := mqttSession.Publish(fmt.Sprintf("%s/range_noac/state", mqttSensorTopic), 0, true, fmt.Sprintf("%.0f", retBattery.CruisingRangeACOff/1000)); token.Wait() && token.Error() != nil {342 log.Printf("[battery] Failed to update MQTT: %v", token.Error())343 }344 // MQTT plugged in update.345 state := "off"346 if retBattery.PluginState == "CONNECTED" {347 state = "on"348 }349 if token := mqttSession.Publish(fmt.Sprintf("%s/plugged/state", mqttBinaryTopic), 0, true, state); token.Wait() && token.Error() != nil {350 log.Printf("[battery] Failed to update MQTT: %v", token.Error())351 }352 // MQTT charging update.353 state = "off"354 if retBattery.BatteryStatus.BatteryChargingStatus == "YES" {355 state = "on"356 }357 if token := mqttSession.Publish(fmt.Sprintf("%s/charging/state", mqttBinaryTopic), 0, true, state); token.Wait() && token.Error() != nil {358 log.Printf("[battery] Failed to update MQTT: %v", token.Error())359 }360 // MQTT temperature update.361 if token := mqttSession.Publish(fmt.Sprintf("%s/temperature/state", mqttSensorTopic), 0, true, retTemperature.Temperature); token.Wait() && token.Error() != nil {362 log.Printf("[battery] Failed to update MQTT: %v", token.Error())363 }364 if retBattery.BatteryStatus.BatteryChargingStatus.IsCharging() {365 log.Printf("[battery] Waiting for 5min (charging)")366 time.Sleep(5*time.Minute)367 } else if carHVAC {368 log.Printf("[battery] Waiting for 5min (heating up)")369 time.Sleep(5*time.Minute)370 } else {371 log.Printf("[battery] Waiting for 15min")372 time.Sleep(15*time.Minute)373 }374 }375}376func updateLocation(session *leaf.Session, mqttSession mqtt.Client, chError chan error) {377 for {378 sessionLock.Lock()379 ret, err := session.LocateVehicle()380 sessionLock.Unlock()381 if err != nil {382 log.Printf("[locate] Failed, retrying in 5 minutes: %v", err)383 sessionLock.Lock()384 for {385 _, _, _, err := session.Login()386 if err != nil {387 log.Printf("[battery] Failed login, retrying in 15s: %v", err)388 time.Sleep(15*time.Second)389 continue390 }391 break392 }393 sessionLock.Unlock()394 time.Sleep(5*time.Minute)395 continue396 }397 if ret.Latitude == "" || ret.Longitude == "" {398 log.Printf("[locate] Failed, retrying in 5 minutes: bad data received")399 sessionLock.Lock()400 for {401 _, _, _, err := session.Login()402 if err != nil {403 log.Printf("[battery] Failed login, retrying in 15s: %v", err)404 time.Sleep(15*time.Second)405 continue406 }407 break408 }409 sessionLock.Unlock()410 time.Sleep(5*time.Minute)411 continue412 }413 // MQTT location update.414 data := fmt.Sprintf(`{415 "latitude": %s,416 "longitude": %s,417 "gps_accuracy": 1.2418}`, ret.Latitude, ret.Longitude)419 if token := mqttSession.Publish(fmt.Sprintf("%s/location/attributes", mqttTrackerTopic), 0, true, data); token.Wait() && token.Error() != nil {420 log.Printf("[locate] Failed to update MQTT: %v", token.Error())421 }422 carLocationLock.Lock()423 moved := carLocation == nil || ret.Longitude != carLocation.Longitude || ret.Latitude != carLocation.Latitude...

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pushChannel.go

Source:pushChannel.go Github

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...22 err = p.engineMqtt.Where("channel_type = ?", channelType+p.lastfix).And("service = ?", "mqtt").And("production = ?", "storybox").Find(&pushChannels)23 return24}25func (p *PushChannel) Delete(channelType string) (err error) {26 sessionMqtt := p.engineMqtt.NewSession()27 defer sessionMqtt.Close()28 lists, err := p.List(channelType)29 if err != nil {30 sessionMqtt.Rollback()31 return32 }33 for _, one := range lists {34 _, err = sessionMqtt.Id(one.General.Id).Delete(&one)35 if err != nil {36 sessionMqtt.Rollback()37 return38 }39 }40 err = sessionMqtt.Commit()41 return42}43func (p *PushChannel) Add(autobuildId int, paramsJson string) (err error) {44 sessionTK := p.engineTK.NewSession()45 sessionMqtt := p.engineMqtt.NewSession()46 defer sessionTK.Close()47 defer sessionMqtt.Close()48 err = sessionTK.Begin()49 if err != nil {50 return51 }52 err = sessionMqtt.Begin()53 if err != nil {54 return55 }56 autobuild := models.AutoBuild{}57 _, err = sessionTK.Where("id = ?", autobuildId).Get(&autobuild)58 if err != nil {59 sessionTK.Rollback()60 sessionMqtt.Rollback()61 return err62 }63 channelType := autobuild.AppId + p.lastfix64 // 如果mqtt状态为true，则检查是否已插入65 if autobuild.Mqtt != 0 {66 tmpMqtt := models.PushChannel{}67 _, err = sessionMqtt.Where("channel_type = ?", channelType).And("service = ?", "mqtt").And("production = ?", "storybox").Get(&tmpMqtt)68 if err != nil {69 sessionTK.Rollback()70 sessionMqtt.Rollback()71 return err72 }73 if tmpMqtt.Id > 0 {74 return errors.New("mqtt already set")75 }76 }77 mqtt := models.PushChannel{78 ChannelType: channelType,79 Production: "storybox",80 Service: "mqtt",81 Params: paramsJson,82 Status: 1,83 }84 mqtt.General.UpdatedAt = int(time.Now().Unix())85 mqtt.General.CreatedAt = int(time.Now().Unix())86 _, err = sessionMqtt.Insert(&mqtt)87 if err != nil {88 sessionTK.Rollback()89 sessionMqtt.Rollback()90 return err91 }92 autobuild.Mqtt = 193 updateAutobuild := models.AutoBuild{94 Mqtt: 1,95 }96 _, err = sessionTK.Where("id = ?", autobuild.Id).Update(&updateAutobuild)97 if err != nil {98 sessionTK.Rollback()99 sessionMqtt.Rollback()100 return err101 }102 err = sessionTK.Commit()103 if err != nil {104 sessionTK.Rollback()105 sessionMqtt.Rollback()106 return err107 }108 err = sessionMqtt.Commit()109 if err != nil {110 sessionTK.Rollback()111 sessionMqtt.Rollback()112 return err113 }114 return nil115}...

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config.go

Source:config.go Github

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...14 // if this flag set true, sever will store the message and can be delivered to future subscribers15 // default false16 // Note: Can not use "omitempty" option, It will affect the output of the default configuration file17 MqttRetain bool `json:"mqttRetain"`18 // MqttSessionQueueSize indicates the size of how many sessions will be handled.19 // default 10020 MqttSessionQueueSize int `json:"mqttSessionQueueSize,omitempty"`21 // MqttServerInternal indicates internal mqtt broker url22 // default tcp://127.0.0.1:188423 MqttServerInternal string `json:"mqttServerInternal,omitempty"`24 // MqttServerExternal indicates external mqtt broker url25 // default tcp://127.0.0.1:188326 MqttServerExternal string `json:"mqttServerExternal,omitempty"`27 // MqttMode indicates which broker type will be choose28 // 0: internal mqtt broker enable only. 1: internal and external mqtt broker enable. 2: external mqtt broker enable only29 // +Required30 // default: 031 MqttMode int `json:"mqttMode"`32}33func GetEventBusConfig() *EventBusConfig {34 eBConfig := &EventBusConfig{}35 qos, err := config.CONFIG.GetValue("eventbus.mqtt.qos").ToInt()36 if err != nil {37 klog.Infof("eventbus.mqtt.qos is empty")38 qos = 239 }40 eBConfig.MqttQOS = qos41 retain, err := config.CONFIG.GetValue("eventbus.mqtt.retain").ToBool()42 if err != nil {43 klog.Infof("eventbus.mqtt.retain is empty")44 retain = false45 }46 eBConfig.MqttRetain = retain47 sessionQueueSize, err := config.CONFIG.GetValue("eventbus.mqtt.session-queue-size").ToInt()48 if err != nil {49 klog.Infof("eventbus.mqtt.session-queue-size is empty")50 sessionQueueSize = 10051 }52 eBConfig.MqttSessionQueueSize = sessionQueueSize53 MqttServerInternal, err := config.CONFIG.GetValue("eventbus.mqtt.mqttServerInternal").ToString()54 if err != nil {55 klog.Infof("eventbus.mqtt.mqttServerInternal is empty")56 MqttServerInternal = "tcp://127.0.0.1:1884"57 }58 eBConfig.MqttServerInternal = MqttServerInternal59 MqttServerExternal, err := config.CONFIG.GetValue("eventbus.mqtt.mqttServerExternal").ToString()60 if err != nil {61 klog.Infof("eventbus.mqtt.mqttServerExternal is empty")62 MqttServerExternal = "tcp://127.0.0.1:1883"63 }64 eBConfig.MqttServerExternal = MqttServerExternal65 mode, err := config.CONFIG.GetValue("eventbus.mqtt.mode").ToInt()66 if err != nil {...

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session

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1import (2func main() {3 opts.SetKeepAlive(2 * time.Second)4 opts.SetPingTimeout(1 * time.Second)5 c := mqtt.NewClient(opts)6 if token := c.Connect(); token.Wait() && token.Error() != nil {7 panic(token.Error())8 }9 fmt.Println("Connected to broker")10 if token := c.Subscribe("hello/world/1", 0, func(client mqtt.Client, msg mqtt.Message) {11 fmt.Printf("Received message: %s from topic: %s\n", msg.Payload(), msg.Topic())12 }); token.Wait() && token.Error() != nil {13 log.Println(token.Error())14 os.Exit(1)15 }16 fmt.Println("Subscribed to topic")17 time.Sleep(3 * time.Second)18 if token := c.Publish("hello/world/1", 0, false, "Hello World"); token.Wait() && token.Error() != nil {19 log.Println(token.Error())20 os.Exit(1)21 }22 fmt.Println("Published message to topic")23 time.Sleep(3 * time.Second)24}25import (26func main() {27 opts.SetKeepAlive(2 * time.Second)28 opts.SetPingTimeout(1 * time.Second)29 c := mqtt.NewClient(opts)30 if token := c.Connect(); token.Wait() && token.Error() != nil {31 panic(token.Error())32 }33 fmt.Println("Connected to broker")34 if token := c.Subscribe("hello/world/2", 0, func(client mqtt.Client, msg mqtt.Message) {35 fmt.Printf("Received message: %s from topic: %s\n", msg.Payload(), msg.Topic())36 }); token.Wait() && token.Error() != nil {37 log.Println(token.Error())38 os.Exit(1)39 }40 fmt.Println("Subscribed to topic")41 time.Sleep(3 * time.Second)42 if token := c.Publish("hello/world/2", 0, false,

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session

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1import (2func main() {3 opts := mqtt.NewClientOptions()4 opts.SetClientID("go-simple")5 opts.SetCleanSession(false)6 opts.SetUsername("test")7 opts.SetPassword("test")8 opts.SetKeepAlive(2 * time.Second)9 opts.SetPingTimeout(1 * time.Second)10 opts.SetWriteTimeout(1 * time.Second)11 opts.SetMaxReconnectInterval(1 * time.Second)12 opts.SetAutoReconnect(false)13 client := mqtt.NewClient(opts)14 if token := client.Connect(); token.Wait() && token.Error() != nil {15 panic(token.Error())16 }17 fmt.Println("Connected")18 if token := client.Subscribe("test", 0, func(client mqtt.Client, msg mqtt.Message) {19 fmt.Printf("Received message on topic: %s Message: %s\n", msg.Topic(), msg.Payload())20 }); token.Wait() && token.Error() != nil {21 fmt.Println(token.Error())22 os.Exit(1)23 }24 for i := 0; i < 5; i++ {25 text := fmt.Sprintf("this is msg #%d!", i)26 token := client.Publish("test", 0, false, text)27 token.Wait()28 }29 time.Sleep(6 * time.Second)30 if token := client.Unsubscribe("test"); token.Wait() && token.Error() != nil {31 fmt.Println(token.Error())32 os.Exit(1)33 }34 client.Disconnect(250)35}36import (37func main() {38 opts := mqtt.NewClientOptions()39 opts.SetClientID("go-simple")40 opts.SetCleanSession(false)41 opts.SetUsername("test")42 opts.SetPassword("test")43 opts.SetKeepAlive(2 * time.Second)44 opts.SetPingTimeout(1 * time.Second)45 opts.SetWriteTimeout(1 * time.Second)46 opts.SetMaxReconnectInterval(1 *

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session

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1import (2func main() {3 opts.SetClientID("go-simple")4 opts.SetCleanSession(false)5 opts.SetKeepAlive(2 * time.Second)6 opts.SetPingTimeout(1 * time.Second)7 c := mqtt.NewClient(opts)8 if token := c.Connect(); token.Wait() && token.Error() != nil {9 panic(token.Error())10 }11 if token := c.Subscribe("go-simple", 0, nil); token.Wait() && token.Error() != nil {12 fmt.Println(token.Error())13 os.Exit(1)14 }15 time.Sleep(3 * time.Second)16 if token := c.Unsubscribe("go-simple"); token.Wait() && token.Error() != nil {17 fmt.Println(token.Error())18 os.Exit(1)19 }20 c.Disconnect(250)21}22import (23func main() {24 opts.SetClientID("go-simple")25 opts.SetCleanSession(true)26 opts.SetKeepAlive(2 * time.Second)27 opts.SetPingTimeout(1 * time.Second)28 c := mqtt.NewClient(opts)29 if token := c.Connect(); token.Wait() && token.Error() != nil {30 panic(token.Error())31 }32 if token := c.Subscribe("go-simple", 0, nil); token.Wait() && token.Error() != nil {33 fmt.Println(token.Error())34 os.Exit(1)35 }36 time.Sleep(3 * time.Second)37 if token := c.Unsubscribe("go-simple"); token.Wait() && token.Error() != nil {38 fmt.Println(token.Error())39 os.Exit(1)40 }41 c.Disconnect(250)42}

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session

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1import (2func main() {3 opts.SetClientID("go-simple")4 opts.SetUsername("admin")5 opts.SetPassword("password")6 c := mqtt.NewClient(opts)7 if token := c.Connect(); token.Wait() && token.Error() != nil {8 panic(token.Error())9 }10 if token := c.Subscribe("go-mqtt/sample", 0, nil); token.Wait() && token.Error() != nil {11 fmt.Println(token.Error())12 os.Exit(1)13 }14 for i := 0; i < 5; i++ {15 text := fmt.Sprintf("this is msg #%d!", i)16 token := c.Publish("go-mqtt/sample", 0, false, text)17 token.Wait()18 }19 if token := c.Unsubscribe("go-mqtt/sample"); token.Wait() && token.Error() != nil {20 fmt.Println(token.Error())21 os.Exit(1)22 }23 c.Disconnect(250)24}

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