From: Liu Han Date: Sat, 10 Dec 2016 06:34:50 +0000 (+0800) Subject: examples: Add CoAP client demo X-Git-Tag: v2.0-rc1~85^2 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=56514d5ab20c5d506f382a7a9c7966bbcd1ba65a;p=esp-idf examples: Add CoAP client demo Test CoAP protocol client --- diff --git a/examples/23_coap_client/Makefile b/examples/23_coap_client/Makefile new file mode 100644 index 0000000000..c9a25d117f --- /dev/null +++ b/examples/23_coap_client/Makefile @@ -0,0 +1,9 @@ +# +# This is a project Makefile. It is assumed the directory this Makefile resides in is a +# project subdirectory. +# + +PROJECT_NAME := coap_client + +include $(IDF_PATH)/make/project.mk + diff --git a/examples/23_coap_client/main/Kconfig.projbuild b/examples/23_coap_client/main/Kconfig.projbuild new file mode 100644 index 0000000000..ba3e0d458b --- /dev/null +++ b/examples/23_coap_client/main/Kconfig.projbuild @@ -0,0 +1,34 @@ +menu "Example Configuration" + +config TARGET_DOMAIN + string "Target Domain" + default "californium.eclipse.org" + help + Target domain for the example to connect to. + +config TARGET_DOMAIN_URI + string "Target Uri" + default "coap://californium.eclipse.org" + help + Target uri for the example to use. + +config TARGET_PORT_NUMBER + int "Target port number" + range 0 65535 + default 5683 + help + Target port number for the example to connect to. + +config WIFI_SSID + string "WiFi SSID" + default "myssid" + help + SSID (network name) for the example to connect to. + +config WIFI_PASSWORD + string "WiFi Password" + default "mypassword" + help + WiFi password (WPA or WPA2) for the example to use. + +endmenu \ No newline at end of file diff --git a/examples/23_coap_client/main/coap_client.c b/examples/23_coap_client/main/coap_client.c new file mode 100644 index 0000000000..cef24f4c6e --- /dev/null +++ b/examples/23_coap_client/main/coap_client.c @@ -0,0 +1,176 @@ +/* CoAP client Example + + This example code is in the Public Domain (or CC0 licensed, at your option.) + + Unless required by applicable law or agreed to in writing, this + software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR + CONDITIONS OF ANY KIND, either express or implied. +*/ +#include "coap_client.h" + +#include + +#include "freertos/FreeRTOS.h" +#include "freertos/task.h" +#include "freertos/event_groups.h" + +#include "esp_log.h" +#include "esp_wifi.h" +#include "esp_event_loop.h" + +#include "nvs_flash.h" +#include + +#include "coap_config.h" +#include "resource.h" +#include "coap.h" + + +static EventGroupHandle_t wifi_event_group; + +/* The event group allows multiple bits for each event, + but we only care about one event - are we connected + to the AP with an IP? */ +const static int CONNECTED_BIT = BIT0; + +const static char *TAG = "CoAP_demo"; + +static void message_handler(struct coap_context_t *ctx, const coap_endpoint_t *local_interface, const coap_address_t *remote, + coap_pdu_t *sent, coap_pdu_t *received, + const coap_tid_t id) +{ + unsigned char* data = NULL; + size_t data_len; + if (COAP_RESPONSE_CLASS(received->hdr->code) == 2) { + if (coap_get_data(received, &data_len, &data)) { + printf("Received: %s\n", data); + } + } +} + +static void coap_demo_thread(void *p) +{ + coap_context_t* ctx = NULL; + coap_address_t dst_addr, src_addr; + static coap_uri_t uri; + fd_set readfds; + struct timeval tv; + int flags, result; + coap_pdu_t* request = NULL; + const char* server_uri = COAP_DEFAULT_DEMO_URI; + uint8_t get_method = 1; + + coap_address_init(&src_addr); + src_addr.addr.sin.sin_family = AF_INET; + src_addr.addr.sin.sin_port = htons(0); + src_addr.addr.sin.sin_addr.s_addr = INADDR_ANY; + + ctx = coap_new_context(&src_addr); + if (ctx) { + coap_address_init(&dst_addr); + dst_addr.addr.sin.sin_family = AF_INET; + dst_addr.addr.sin.sin_port = htons(COAP_DEFAULT_PORT); + dst_addr.addr.sin.sin_addr.s_addr = inet_addr(COAP_DEFAULT_DEMO_ADDR); + + coap_split_uri((const uint8_t *)server_uri, strlen(server_uri), &uri); + request = coap_new_pdu(); + if (request){ + request->hdr->type = COAP_MESSAGE_CON; + request->hdr->id = coap_new_message_id(ctx); + request->hdr->code = get_method; + coap_add_option(request, COAP_OPTION_URI_PATH, uri.path.length, uri.path.s); + + coap_register_response_handler(ctx, message_handler); + coap_send_confirmed(ctx, ctx->endpoint, &dst_addr, request); + + flags = fcntl(ctx->sockfd, F_GETFL, 0); + fcntl(ctx->sockfd, F_SETFL, flags|O_NONBLOCK); + + tv.tv_usec = COAP_DEFAULT_TIME_USEC; + tv.tv_sec = COAP_DEFAULT_TIME_SEC; + + for(;;) { + FD_ZERO(&readfds); + FD_CLR( ctx->sockfd, &readfds ); + FD_SET( ctx->sockfd, &readfds ); + result = select( FD_SETSIZE, &readfds, 0, 0, &tv ); + if (result > 0) { + if (FD_ISSET( ctx->sockfd, &readfds )) + coap_read(ctx); + } else if (result < 0) { + break; + } else { + printf("select timeout\n"); + } + } + } + coap_free_context(ctx); + } + + vTaskDelete(NULL); +} + +static void coap_server_init(void) +{ + int ret = pdPASS; + xTaskHandle coap_handle = NULL; + + ret = xTaskCreate(coap_demo_thread, + COAP_DEMO_THREAD_NAME, + COAP_DEMO_THREAD_STACK_WORDS, + NULL, + COAP_DEMO_THREAD_PRORIOTY, + &coap_handle); + + if (ret != pdPASS) { + ESP_LOGI(TAG, "create thread %s failed", COAP_DEMO_THREAD_NAME); + } +} + +static esp_err_t wifi_event_handler(void *ctx, system_event_t *event) +{ + switch(event->event_id) { + case SYSTEM_EVENT_STA_START: + esp_wifi_connect(); + break; + case SYSTEM_EVENT_STA_GOT_IP: + xEventGroupSetBits(wifi_event_group, CONNECTED_BIT); + coap_server_init(); + break; + case SYSTEM_EVENT_STA_DISCONNECTED: + /* This is a workaround as ESP32 WiFi libs don't currently + auto-reassociate. */ + esp_wifi_connect(); + xEventGroupClearBits(wifi_event_group, CONNECTED_BIT); + break; + default: + break; + } + return ESP_OK; +} + +static void wifi_conn_init(void) +{ + tcpip_adapter_init(); + wifi_event_group = xEventGroupCreate(); + ESP_ERROR_CHECK( esp_event_loop_init(wifi_event_handler, NULL) ); + wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT(); + ESP_ERROR_CHECK( esp_wifi_init(&cfg) ); + ESP_ERROR_CHECK( esp_wifi_set_storage(WIFI_STORAGE_RAM) ); + wifi_config_t wifi_config = { + .sta = { + .ssid = EXAMPLE_WIFI_SSID, + .password = EXAMPLE_WIFI_PASS, + }, + }; + ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA) ); + ESP_ERROR_CHECK( esp_wifi_set_config(WIFI_IF_STA, &wifi_config) ); + + ESP_ERROR_CHECK( esp_wifi_start() ); +} + +void app_main(void) +{ + nvs_flash_init(); + wifi_conn_init(); +} diff --git a/examples/23_coap_client/main/coap_client.h b/examples/23_coap_client/main/coap_client.h new file mode 100644 index 0000000000..50f4ccd16f --- /dev/null +++ b/examples/23_coap_client/main/coap_client.h @@ -0,0 +1,43 @@ +/* CoAP client Example + + This example code is in the Public Domain (or CC0 licensed, at your option.) + + Unless required by applicable law or agreed to in writing, this + software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR + CONDITIONS OF ANY KIND, either express or implied. +*/ + +#ifndef _COAP_CLIENT_H_ +#define _COAP_CLIENT_H_ + +#include + +/* The examples use simple WiFi configuration that you can set via + 'make menuconfig'. + + If you'd rather not, just change the below entries to strings with + the config you want - ie #define EXAMPLE_WIFI_SSID "mywifissid" +*/ +#define EXAMPLE_WIFI_SSID CONFIG_WIFI_SSID +#define EXAMPLE_WIFI_PASS CONFIG_WIFI_PASSWORD + +#define COAP_DEMO_THREAD_NAME "CoAP_demo" +#define COAP_DEMO_THREAD_STACK_WORDS 10240 +#define COAP_DEMO_THREAD_PRORIOTY 8 + +#define COAP_DEFAULT_TIME_SEC 5 +#define COAP_DEFAULT_TIME_USEC 0 + +/* The examples use domain of "californium.eclipse.org",uri "coap://californium.eclipse.org" and port number of 5683 that + you can set via 'make menuconfig'. + + If you'd rather not, just change the below entries to strings with + the config you want - ie #define COAP_DEFAULT_DEMO_ADDR "californium.eclipse.org" + , ie #define COAP_DEFAULT_DEMO_URI "coap://californium.eclipse.org" and ie #define COAP_DEFAULT_PORT 5683 +*/ +#define COAP_DEFAULT_PORT CONFIG_TARGET_PORT_NUMBER +#define COAP_DEFAULT_DEMO_ADDR CONFIG_TARGET_DOMAIN +#define COAP_DEFAULT_DEMO_URI CONFIG_TARGET_DOMAIN_URI + +#endif + diff --git a/examples/23_coap_client/main/component.mk b/examples/23_coap_client/main/component.mk new file mode 100644 index 0000000000..0b9d7585e7 --- /dev/null +++ b/examples/23_coap_client/main/component.mk @@ -0,0 +1,5 @@ +# +# "main" pseudo-component makefile. +# +# (Uses default behaviour of compiling all source files in directory, adding 'include' to include path.) +