Mainflux.mainflux/coap

Mainflux CoAP Adapter

Mainflux CoAP adapter provides an CoAP API for sending messages through the platform.

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_COAP_ADAPTER_LOG_LEVEL	Service log level	info
MF_COAP_ADAPTER_HOST	CoAP service listening host
MF_COAP_ADAPTER_PORT	CoAP service listening port	5683
MF_COAP_ADAPTER_SERVER_CERT	CoAP service server certificate
MF_COAP_ADAPTER_SERVER_KEY	CoAP service server key
MF_COAP_ADAPTER_HTTP_HOST	Service HTTP listening host
MF_COAP_ADAPTER_HTTP_PORT	Service listening port	5683
MF_COAP_ADAPTER_HTTP_SERVER_CERT	Service server certificate
MF_COAP_ADAPTER_HTTP_SERVER_KEY	Service server key
MF_THINGS_AUTH_GRPC_URL	Things service Auth gRPC URL	localhost:7000
MF_THINGS_AUTH_GRPC_TIMEOUT	Things service Auth gRPC request timeout in seconds	1s
MF_THINGS_AUTH_GRPC_CLIENT_TLS	Flag that indicates if TLS should be turned on	false
MF_THINGS_AUTH_GRPC_CA_CERTS	Path to trusted CAs in PEM format
MF_MESSAGE_BROKER_URL	Message broker instance URL	nats://localhost:4222
MF_JAEGER_URL	Jaeger server URL	http://jaeger:14268/api/traces
MF_SEND_TELEMETRY	Send telemetry to mainflux call home server	true
MF_COAP_ADAPTER_INSTANCE_ID	CoAP adapter instance ID

Deployment

The service itself is distributed as Docker container. Check the coap-adapter service section in docker-compose to see how service is deployed.

Running this service outside of container requires working instance of the message broker service. To start the service outside of the container, execute the following shell script:

# download the latest version of the service
git clone https://github.com/mainflux/mainflux

cd mainflux

# compile the http
make coap

# copy binary to bin
make install

# set the environment variables and run the service
MF_COAP_ADAPTER_LOG_LEVEL=[Service log level] \
MF_COAP_ADAPTER_HOST=[CoAP service host] \
MF_COAP_ADAPTER_PORT=[CoAP service port] \
MF_COAP_ADAPTER_SERVER_CERT=[Path to CoAP server certificate] \
MF_COAP_ADAPTER_SERVER_KEY=[Path to CoAP server key] \
MF_COAP_ADAPTER_HTTP_HOST=[CoAP HTTP service host] \
MF_COAP_ADAPTER_HTTP_PORT=[CoAP HTTP service port] \
MF_COAP_ADAPTER_HTTP_SERVER_CERT=[Path to HTTP server certificate] \
MF_COAP_ADAPTER_HTTP_SERVER_KEY=[Path to HTTP server key] \
MF_THINGS_AUTH_GRPC_URL=[Things service Auth gRPC URL] \
MF_THINGS_AUTH_GRPC_TIMEOUT=[Things service Auth gRPC request timeout in seconds] \
MF_THINGS_AUTH_GRPC_CLIENT_TLS=[Flag that indicates if TLS should be turned on] \
MF_THINGS_AUTH_GRPC_CA_CERTS=[Path to trusted CAs in PEM format] \
MF_MESSAGE_BROKER_URL=[Message broker instance URL] \
MF_JAEGER_URL=[Jaeger server URL] \
MF_SEND_TELEMETRY=[Send telemetry to mainflux call home server] \
MF_COAP_ADAPTER_INSTANCE_ID=[CoAP adapter instance ID] \
$GOBIN/mainflux-coap

Usage

If CoAP adapter is running locally (on default 5683 port), a valid URL would be: coap://localhost/channels/<channel_id>/messages?auth=<thing_auth_key>. Since CoAP protocol does not support Authorization header (option) and options have limited size, in order to send CoAP messages, valid auth value (a valid Thing key) must be present in Uri-Query option.