W55RP20 COAP Client example

github link : https://github.com/WIZnet-ioNIC/WIZnet-PICO-COAP_C/tree/main/examples/coap_client

How to test COAP Client example

Setup board configuration

Setup board to W55RP20_EVB_PICO in CMakeLists.txt in WIZnet-PICO-COAP_C/ directory.

# Set board
#set(BOARD_NAME WIZnet_Ethernet_HAT)
#set(BOARD_NAME W5100S_EVB_PICO)
#set(BOARD_NAME W5500_EVB_PICO)
set(BOARD_NAME W55RP20_EVB_PICO)
#set(BOARD_NAME W5100S_EVB_PICO2)
#set(BOARD_NAME W5500_EVB_PICO2)

Setup network settings

Setup network configuration such as IP in 'w5x00_coap_client.c' which is the COAP Client example in 'WIZnet-PICO-COAP_C/examples/coap_client/' directory.

/* Network */
static wiz_NetInfo g_net_info =
    {
        .mac = {0x00, 0x08, 0xDC, 0x12, 0x34, 0x56}, // MAC address
        .ip = {192, 168, 11, 2},                     // IP address
        .sn = {255, 255, 255, 0},                    // Subnet Mask
        .gw = {192, 168, 11, 1},                     // Gateway
        .dns = {8, 8, 8, 8},                         // DNS server
        .dhcp = NETINFO_STATIC                       // DHCP enable/disable
};

uint8_t payload[] = ""; 
uint8_t uri_path[] = ".well-known/core";

Setup coap client configuration

Setup COAP configuration in 'coapClient.c' in 'WIZnet-PICO-COAP_C/libraries/coapLibrary/coapClient/' directory.

static uint8_t destip[4] = {192, 168, 11, 3};  
static uint16_t destport = 5683;

Setup coap server program

Download libcoap program

$ git clone https://github.com/obgm/libcoap.git
$ cd libcoap
$ git checkout main

$ cmake -E remove_directory build
$ cmake -E make_directory build
$ cd build
$ cmake .. -DENABLE_TESTS=ON
$ cmake --build .
$ cd Debug

If the build is successful, the programs coap-server.exe and coap-client.exe will appear as shown below.

Execute libcoap server program and open COAP server.

Build & Run

If the COAP Client example works normally, you can see the network information and the list of resources provided by the CoAP server every second.

Wireshark packet capture.