Make the HCI device index configurable

config.sample.yml

@@ -4,6 +4,9 @@ gw_mac: 00:00:00:00:00:00
 # Whether to include all advertisements (true) or just those from RuuviTags (false)
 all_advertisements: false
 
+# HCI device index for the bluetooth adapter to use. 0 by default, which should correspond to the hci0 device
+hci_index: 0
+
 # Publish the data to MQTT in Ruuvi Gateway format
 mqtt:
   # Flag to enable or disable publishing the data to a MQTT server

config/config.go

@@ -38,6 +38,7 @@ type Logging struct {
 type Config struct {
 	GwMac             string  `yaml:"gw_mac"`
 	AllAdvertisements bool    `yaml:"all_advertisements"`
+	HciIndex          int     `yaml:"hci_index"`
 	MQTT              *MQTT   `yaml:"mqtt,omitempty"`
 	HTTP              *HTTP   `yaml:"http,omitempty"`
 	Logging           Logging `yaml:"logging"`
@@ -46,7 +47,7 @@ type Config struct {
 
 func ReadConfig(configFile string, strict bool) (Config, error) {
 	if _, err := os.Stat(configFile); errors.Is(err, os.ErrNotExist) {
-		return Config{}, errors.New(fmt.Sprintf("No config found! Tried to open \"%s\"", configFile))
+		return Config{}, fmt.Errorf("no config found! Tried to open \"%s\"", configFile)
 	}
 
 	f, err := os.Open(configFile)

gateway/gateway.go

@@ -32,11 +32,15 @@ func Run(config config.Config) {
 		log.Fatal("Neither MQTT nor HTTP is configured, check the config")
 	}
 
-	device, err := dev.NewDevice("default", ble.OptScanParams(cmd.LESetScanParameters{
-		LEScanType: 0, // passive scan
-	}))
+	device, err := dev.NewDevice("default",
+		ble.OptDeviceID(config.HciIndex),
+		ble.OptScanParams(cmd.LESetScanParameters{
+			LEScanType: 0, // passive scan
+		}))
 	if err != nil {
-		log.WithError(err).Fatal("Can't setup default bluetooth device")
+		log.WithError(err).WithFields(log.Fields{
+			"hci_index": config.HciIndex,
+		}).Fatal("Can't setup bluetooth device")
 	}
 	ble.SetDefaultDevice(device)
 	advHandler := func(adv ble.Advertisement) {