| Title: CoAP client |
| |
| Description: |
| |
| A simple CoAP server showing how to retrieve information from a resource. |
| |
| This demo assumes that the platform of choice has networking support, |
| some adjustments to the configuration may be needed. |
| |
| This sample will make a GET request with path 'test' to the IPv6 |
| multicast address reserved for CoAP nodes, so the URI can be |
| represented as: |
| |
| coap://[ff02::fd]:5683/test |
| |
| -------------------------------------------------------------------------------- |
| |
| Building and Running Project: |
| |
| This project will print all the octets of the response received, more context can |
| be obtained by using a tool like tcpdump or wireshark. |
| |
| See the net-tools[1] project for more details. |
| |
| It can be built and executed on QEMU as follows: |
| |
| make qemu |
| |
| [1] net-tools: |
| https://gerrit.zephyrproject.org/r/gitweb?p=net-tools.git;a=tree |
| |
| -------------------------------------------------------------------------------- |
| |
| Troubleshooting: |
| |
| Problems caused by out-dated project information can be addressed by |
| issuing one of the following commands then rebuilding the project: |
| |
| make clean # discard results of previous builds |
| # but keep existing configuration info |
| or |
| make pristine # discard results of previous builds |
| # and restore pre-defined configuration info |
| |
| ------------------------------------------------------------------------------- |
| |
| Sample output: |
| |
| reply: 60 00 00 00 00 24 11 40 fe 80 00 00 00 00 00 00 5c 25 e2 ff fe |
| 15 01 01 fe 80 00 00 00 00 00 00 5c 25 e2 ff fe 15 01 01 16 33 16 33 |
| 00 24 3d 86 60 40 00 01 ff 54 79 70 65 3a 20 30 0a 43 6f 64 65 3a 20 |
| 31 0a 4d 49 44 3a 20 31 0a (76 bytes) |
| |
| <the values may be different> |