coap源码和例子，很不错的物联网例子 C语言编写 ./coap-client -v 100 -m get coap://127.0.0.1/.well-known/core ./coap-client -v 100 -m get coap://127.0.0.1/light ./coap-client -e "1" -m put coap://127.0.0.1/light ./coap-client -e "0" -m put coap://127.0.0.1/light