77 lines
4.6 KiB
Markdown
77 lines
4.6 KiB
Markdown
# Mainflux CoAP Adapter
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Mainflux CoAP adapter provides an [CoAP](http://coap.technology/) API for sending messages through the
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platform.
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## Configuration
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The service is configured using the environment variables presented in the
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following table. Note that any unset variables will be replaced with their
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default values.
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| Variable | Description | Default |
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| -------------------------------- | --------------------------------------------------- | ------------------------------ |
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| MF_COAP_ADAPTER_LOG_LEVEL | Service log level | info |
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| MF_COAP_ADAPTER_HOST | CoAP service listening host | |
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| MF_COAP_ADAPTER_PORT | CoAP service listening port | 5683 |
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| MF_COAP_ADAPTER_SERVER_CERT | CoAP service server certificate | |
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| MF_COAP_ADAPTER_SERVER_KEY | CoAP service server key | |
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| MF_COAP_ADAPTER_HTTP_HOST | Service HTTP listening host | |
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| MF_COAP_ADAPTER_HTTP_PORT | Service listening port | 5683 |
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| MF_COAP_ADAPTER_HTTP_SERVER_CERT | Service server certificate | |
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| MF_COAP_ADAPTER_HTTP_SERVER_KEY | Service server key | |
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| MF_THINGS_AUTH_GRPC_URL | Things service Auth gRPC URL | localhost:7000 |
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| MF_THINGS_AUTH_GRPC_TIMEOUT | Things service Auth gRPC request timeout in seconds | 1s |
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| MF_THINGS_AUTH_GRPC_CLIENT_TLS | Flag that indicates if TLS should be turned on | false |
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| MF_THINGS_AUTH_GRPC_CA_CERTS | Path to trusted CAs in PEM format | |
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| MF_MESSAGE_BROKER_URL | Message broker instance URL | nats://localhost:4222 |
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| MF_JAEGER_URL | Jaeger server URL | http://jaeger:14268/api/traces |
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| MF_SEND_TELEMETRY | Send telemetry to mainflux call home server | true |
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| MF_COAP_ADAPTER_INSTANCE_ID | CoAP adapter instance ID | |
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## Deployment
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The service itself is distributed as Docker container. Check the [`coap-adapter`](https://github.com/mainflux/mainflux/blob/master/docker/docker-compose.yml#L273-L291) service section in
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docker-compose to see how service is deployed.
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Running this service outside of container requires working instance of the message broker service.
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To start the service outside of the container, execute the following shell script:
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```bash
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# download the latest version of the service
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git clone https://github.com/mainflux/mainflux
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cd mainflux
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# compile the http
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make coap
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# copy binary to bin
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make install
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# set the environment variables and run the service
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MF_COAP_ADAPTER_LOG_LEVEL=[Service log level] \
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MF_COAP_ADAPTER_HOST=[CoAP service host] \
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MF_COAP_ADAPTER_PORT=[CoAP service port] \
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MF_COAP_ADAPTER_SERVER_CERT=[Path to CoAP server certificate] \
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MF_COAP_ADAPTER_SERVER_KEY=[Path to CoAP server key] \
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MF_COAP_ADAPTER_HTTP_HOST=[CoAP HTTP service host] \
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MF_COAP_ADAPTER_HTTP_PORT=[CoAP HTTP service port] \
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MF_COAP_ADAPTER_HTTP_SERVER_CERT=[Path to HTTP server certificate] \
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MF_COAP_ADAPTER_HTTP_SERVER_KEY=[Path to HTTP server key] \
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MF_THINGS_AUTH_GRPC_URL=[Things service Auth gRPC URL] \
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MF_THINGS_AUTH_GRPC_TIMEOUT=[Things service Auth gRPC request timeout in seconds] \
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MF_THINGS_AUTH_GRPC_CLIENT_TLS=[Flag that indicates if TLS should be turned on] \
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MF_THINGS_AUTH_GRPC_CA_CERTS=[Path to trusted CAs in PEM format] \
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MF_MESSAGE_BROKER_URL=[Message broker instance URL] \
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MF_JAEGER_URL=[Jaeger server URL] \
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MF_SEND_TELEMETRY=[Send telemetry to mainflux call home server] \
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MF_COAP_ADAPTER_INSTANCE_ID=[CoAP adapter instance ID] \
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$GOBIN/mainflux-coap
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```
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## Usage
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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>`.
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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.
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