# README
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_PORT | Service listening port | 5683 |
| MF_BROKER_URL | Message broker instance URL | nats://localhost:4222 |
| MF_COAP_ADAPTER_LOG_LEVEL | Service log level | error |
| MF_COAP_ADAPTER_CLIENT_TLS | Flag that indicates if TLS should be turned on | false |
| MF_COAP_ADAPTER_CA_CERTS | Path to trusted CAs in PEM format | |
| MF_COAP_ADAPTER_PING_PERIOD | Hours between 1 and 24 to ping client with ACK message | 12 |
| MF_JAEGER_URL | Jaeger server URL | localhost:6831 |
| MF_THINGS_AUTH_GRPC_URL | Things service Auth gRPC URL | localhost:8181 |
| MF_THINGS_AUTH_GRPC_TIMEOUT | Things service Auth gRPC request timeout in seconds | 1s |
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/MainfluxLabs/mainflux
cd mainflux
# compile the http
make coap
# copy binary to bin
make install
# set the environment variables and run the service
MF_BROKER_URL=[Message broker instance URL] \
MF_COAP_ADAPTER_PORT=[Service HTTP port] \
MF_COAP_ADAPTER_LOG_LEVEL=[Service log level] \
MF_COAP_ADAPTER_CLIENT_TLS=[Flag that indicates if TLS should be turned on] \
MF_COAP_ADAPTER_CA_CERTS=[Path to trusted CAs in PEM format] \
MF_COAP_ADAPTER_PING_PERIOD: [Hours between 1 and 24 to ping client with ACK message] \
MF_JAEGER_URL=[Jaeger server URL] \
MF_THINGS_AUTH_GRPC_URL=[Things service Auth gRPC URL] \
MF_THINGS_AUTH_GRPC_TIMEOUT=[Things service Auth gRPC request timeout in seconds] \
$GOBIN/mainfluxlabs-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.