lora

README

LoRa Adapter

Adapter between Mainflux IoT system and LoRa Server.

This adapter sits between Mainflux and LoRa server and just forwards the messages from one system to another via MQTT protocol, using the adequate MQTT topics and in the good message format (JSON and SenML), i.e. respecting the APIs of both systems.

LoRa Server is used for connectivity layer and data is pushed via this adapter service to Mainflux, where it is persisted and routed to other protocols via Mainflux multi-protocol message broker. Mainflux adds user accounts, application management and security in order to obtain the overall end-to-end LoRa solution.

Configuration

The service is configured using the environment variables presented in the following table. Note that any unset variables will be replaced with their default values.

Variable	Description	Default
MF_LORA_ADAPTER_HTTP_PORT	Service HTTP port	8180
MF_LORA_ADAPTER_LOG_LEVEL	Service Log level	error
MF_NATS_URL	NATS instance URL	nats://localhost:4222
MF_LORA_ADAPTER_MESSAGES_URL	LoRa Server MQTT broker URL	tcp://localhost:1883
MF_LORA_ADAPTER_ROUTE_MAP_URL	Route-map database URL	localhost:6379
MF_LORA_ADAPTER_ROUTE_MAP_PASS	Route-map database password
MF_LORA_ADAPTER_ROUTE_MAP_DB	Route-map instance	0
MF_THINGS_ES_URL	Things service event source URL	localhost:6379
MF_THINGS_ES_PASS	Things service event source password
MF_THINGS_ES_DB	Things service event source DB	0
MF_LORA_ADAPTER_EVENT_CONSUMER	Service event consumer name	lora

Deployment

The service is distributed as Docker container. The following snippet provides a compose file template that can be used to deploy the service container locally:

version: "2"
services:
  adapter:
    image: mainflux/lora:[version]
    container_name: [instance name]
    environment:
      MF_LORA_ADAPTER_LOG_LEVEL: [Service Log Level]
      MF_NATS_URL: [NATS instance URL]
      MF_LORA_ADAPTER_MESSAGES_URL: [LoRa Server MQTT broker URL]
      MF_LORA_ADAPTER_ROUTE_MAP_URL: [Route-map database URL]
      MF_LORA_ADAPTER_ROUTE_MAP_PASS: [Route-map database password]
      MF_LORA_ADAPTER_ROUTE_MAP_DB: [Route-map instance]
      MF_THINGS_ES_URL: [Things event source URL]
      MF_THINGS_ES_PASS: [Things event source password]
      MF_THINGS_ES_DB: [Things event source DB instance]
      MF_LORA_ADAPTER_EVENT_CONSUMER: [Service event consumer name]

To start the service outside of the container, execute the following shell script:

# download the latest version of the service
git clone https://gitee.com/shtemmi/iotflux

cd mainflux

# compile the lora adapter
make lora

# copy binary to bin
make install

# set the environment variables and run the service
MF_LORA_ADAPTER_LOG_LEVEL=[Lora Adapter Log Level] MF_NATS_URL=[NATS instance URL] MF_LORA_ADAPTER_MESSAGES_URL=[LoRa Server mqtt broker URL] MF_LORA_ADAPTER_ROUTE_MAP_URL=[Lora adapter routemap URL] MF_LORA_ADAPTER_ROUTE_MAP_PASS=[Lora adapter routemap password] MF_LORA_ADAPTER_ROUTE_MAP_DB=[Lora adapter routemap instance] MF_THINGS_ES_URL=[Things service event source URL] MF_THINGS_ES_PASS=[Things service event source password] MF_THINGS_ES_DB=[Things service event source password] MF_OPCUA_ADAPTER_EVENT_CONSUMER=[LoRa adapter instance name] $GOBIN/mainflux-lora

Using docker-compose

This service can be deployed using docker containers. Docker compose file is available in <project_root>/docker/addons/lora-adapter/docker-compose.yml. In order to run Mainflux lora-adapter, execute the following command:

docker-compose -f docker/addons/lora-adapter/docker-compose.yml up -d

Usage

For more information about service capabilities and its usage, please check out the Mainflux documentation.

Documentation

Index

• Variables
• type DataRate
• type Message
• type RouteMapRepository
• type RxInfo
• type Service
  • func New(publisher messaging.Publisher, thingsRM, channelsRM RouteMapRepository) Service
• type TxInfo

Variables

var (
	// ErrMalformedMessage indicates malformed LoRa message.
	ErrMalformedMessage = errors.New("malformed message received")

	// ErrNotFoundDev indicates a non-existent route map for a device EUI.
	ErrNotFoundDev = errors.New("route map not found for this device EUI")

	// ErrNotFoundApp indicates a non-existent route map for an application ID.
	ErrNotFoundApp = errors.New("route map not found for this application ID")
)

Types

type DataRate

type DataRate struct {
	Modulation   string  `json:"modulation"`
	Bandwith     float64 `json:"bandwith"`
	SpreadFactor int64   `json:"spreadFactor"`
}

DataRate lora data rate

type Message

type Message struct {
	ApplicationID       string      `json:"applicationID"`
	ApplicationName     string      `json:"applicationName"`
	DeviceName          string      `json:"deviceName"`
	DevEUI              string      `json:"devEUI"`
	DeviceStatusBattery string      `json:"deviceStatusBattery"`
	DeviceStatusMrgin   string      `json:"deviceStatusMargin"`
	RxInfo              RxInfo      `json:"rxInfo"`
	TxInfo              TxInfo      `json:"txInfo"`
	FCnt                int         `json:"fCnt"`
	FPort               int         `json:"fPort"`
	Data                string      `json:"data"`
	Object              interface{} `json:"object"`
}

Message lora msg (www.loraserver.io/lora-app-server/integrate/data/)

type RouteMapRepository

type RouteMapRepository interface {
	// Save stores/routes pair lora application topic & mainflux channel.
	Save(string, string) error

	// Channel returns mainflux channel for given lora application.
	Get(string) (string, error)

	// Removes mapping from cache.
	Remove(string) error
}

RouteMapRepository store route map between Lora App Server and Mainflux

type RxInfo

type RxInfo []struct {
	Mac       string  `json:"mac"`
	Name      string  `json:"name"`
	Latitude  float64 `json:"latitude"`
	Longitude float64 `json:"longitude"`
	Altitude  float64 `json:"altitude"`
	Time      string  `json:"time"`
	Rssi      float64 `json:"rssi"`
	LoRaSNR   float64 `json:"loRaSNR"`
}

RxInfo receiver parameters

type Service

type Service interface {
	// CreateThing creates thingID:devEUI route-map
	CreateThing(thingID string, devEUI string) error

	// UpdateThing updates thingID:devEUI route-map
	UpdateThing(thingID string, devEUI string) error

	// RemoveThing removes thingID:devEUI route-map
	RemoveThing(thingID string) error

	// CreateChannel creates channelID:appID route-map
	CreateChannel(chanID string, appID string) error

	// UpdateChannel updates channelID:appID route-map
	UpdateChannel(chanID string, appID string) error

	// RemoveChannel removes channelID:appID route-map
	RemoveChannel(chanID string) error

	// Publish forwards messages from the LoRa MQTT broker to Mainflux NATS broker
	Publish(ctx context.Context, token string, msg Message) error
}

Service specifies an API that must be fullfiled by the domain service implementation, and all of its decorators (e.g. logging & metrics).

func New

func New(publisher messaging.Publisher, thingsRM, channelsRM RouteMapRepository) Service

New instantiates the LoRa adapter implementation.

type TxInfo

type TxInfo struct {
	Frequency float64  `json:"frequency"`
	DataRate  DataRate `json:"dataRate"`
	Adr       bool     `json:"adr"`
	CodeRate  string   `json:"codeRate"`
}

TxInfo transmeter parameters