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Example CoAP client

This is an example coap client application, that can be use with any LwM2M Server.

Usage

./run.sh [-k KEYSTORE_FILE] [-s SSL_PROVIDER] <scheme>://<registration-url>

Schemes

  • coap:// (RFC 7252)
  • coaps:// (RFC 7252)
  • coap+tcp:// (RFC 8323)
  • coaps+tcp:// (RFC 8323)

Examples

./run.sh 'coap://localhost:5683/rd?ep=device007&lt=3600&b=U'

Running with openssl:

./run.sh -k device01.jks -s openssl 'coaps://localhost:5684/rd?ep=device001'

Note: this requires openssl installed in your system that support dtls. Use environment variable OPENSSL_BIN_PATH to point to specific location of openssl binary.

Running with standard io (bidirectional pipe):

mkfifo fifo
./run.sh -s stdio "coaps://127.0.0.1:5683/rd?ep=test&aid=dm&lt=60" < fifo | \
socat -d -d - udp-sendto:localhost:5683 > fifo

or

./run.sh -s stdio "coaps://127.0.0.1:5683/rd?ep=test&aid=dm&lt=60" < fifo | \
openssl s_client -connect localhost:5684 -cipher PSK-AES128-CBC-SHA -psk 01010101010101010101010101010101 -psk_identity device-0000000001  -quiet > fifo