add random string to mqtt clientID to prevent concurrent connections

src/v1_TeslaMateAPICarsStatus.go

@@ -11,6 +11,7 @@ import (
 	mqtt "github.com/eclipse/paho.mqtt.golang"
 	"github.com/gin-gonic/gin"
 	_ "github.com/lib/pq"
+	"github.com/thanhpk/randstr"
 )
 
 // defining a lot of vars that are used my the MQTT MessageHandler
@@ -229,11 +230,11 @@ func TeslaMateAPICarsStatusV1(c *gin.Context) {
 	// create options for the MQTT client connection
 	opts := mqtt.NewClientOptions().AddBroker(mqttURL)
 	// setting generic MQTT settings in opts
-	opts.SetKeepAlive(2 * time.Second)   // setting keepalive for client
-	opts.SetDefaultPublishHandler(f)     // using f mqtt.MessageHandler function
-	opts.SetPingTimeout(1 * time.Second) // setting pingtimeout for client
-	opts.SetClientID("teslamateapi")     // setting mqtt client id for TeslaMateApi
-	opts.SetCleanSession(true)           // removal of all subscriptions on disconnect
+	opts.SetKeepAlive(2 * time.Second)                    // setting keepalive for client
+	opts.SetDefaultPublishHandler(f)                      // using f mqtt.MessageHandler function
+	opts.SetPingTimeout(1 * time.Second)                  // setting pingtimeout for client
+	opts.SetClientID("teslamateapi-" + randstr.String(4)) // setting mqtt client id for TeslaMateApi
+	opts.SetCleanSession(true)                            // removal of all subscriptions on disconnect
 
 	// creating MQTT connection with options
 	m := mqtt.NewClient(opts)