mirror of
https://github.com/espressif/ESP8266_RTOS_SDK.git
synced 2025-12-15 10:17:49 +08:00
feat: move coap examples from (release/v3.0)esp-idf/examples/protocols to ESP8266_RTOS_SDK/examples
This commit is contained in:
chenwu
206
examples/coap_client/user/coap_client_example_main.c
Normal file
206
examples/coap_client/user/coap_client_example_main.c
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/* CoAP client Example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#include <string.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/event_groups.h"
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#include "esp_log.h"
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#include "esp_wifi.h"
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#include "esp_event_loop.h"
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#include "nvs_flash.h"
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#include "coap.h"
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/* The examples use simple WiFi configuration that you can set via
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'make menuconfig'.
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If you'd rather not, just change the below entries to strings with
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the config you want - ie #define EXAMPLE_WIFI_SSID "mywifissid"
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*/
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#define EXAMPLE_WIFI_SSID CONFIG_WIFI_SSID
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#define EXAMPLE_WIFI_PASS CONFIG_WIFI_PASSWORD
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#define COAP_DEFAULT_TIME_SEC 5
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#define COAP_DEFAULT_TIME_USEC 0
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/* The examples use uri "coap://californium.eclipse.org" that
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you can set via 'make menuconfig'.
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If you'd rather not, just change the below entries to strings with
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the config you want - ie #define COAP_DEFAULT_DEMO_URI "coap://californium.eclipse.org"
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*/
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#define COAP_DEFAULT_DEMO_URI CONFIG_TARGET_DOMAIN_URI
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static EventGroupHandle_t wifi_event_group;
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/* The event group allows multiple bits for each event,
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but we only care about one event - are we connected
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to the AP with an IP? */
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const static int CONNECTED_BIT = BIT0;
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const static char *TAG = "CoAP_client";
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static void message_handler(struct coap_context_t *ctx, const coap_endpoint_t *local_interface, const coap_address_t *remote,
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coap_pdu_t *sent, coap_pdu_t *received,
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const coap_tid_t id)
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{
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unsigned char* data = NULL;
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size_t data_len;
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if (COAP_RESPONSE_CLASS(received->hdr->code) == 2) {
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if (coap_get_data(received, &data_len, &data)) {
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printf("Received: %s\n", data);
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}
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}
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}
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static void coap_example_task(void *p)
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{
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struct hostent *hp;
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struct ip4_addr *ip4_addr;
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coap_context_t* ctx = NULL;
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coap_address_t dst_addr, src_addr;
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static coap_uri_t uri;
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fd_set readfds;
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struct timeval tv;
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int flags, result;
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coap_pdu_t* request = NULL;
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const char* server_uri = COAP_DEFAULT_DEMO_URI;
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uint8_t get_method = 1;
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while (1) {
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/* Wait for the callback to set the CONNECTED_BIT in the
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event group.
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*/
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xEventGroupWaitBits(wifi_event_group, CONNECTED_BIT,
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false, true, portMAX_DELAY);
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ESP_LOGI(TAG, "Connected to AP");
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if (coap_split_uri((const uint8_t *)server_uri, strlen(server_uri), &uri) == -1) {
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ESP_LOGE(TAG, "CoAP server uri error");
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break;
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}
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printf("host:%s path:%s\n", (const char *)uri.host.s, (const char *)uri.path.s);
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hp = gethostbyname((const char *)uri.host.s);
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if (hp == NULL) {
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ESP_LOGE(TAG, "DNS lookup failed");
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vTaskDelay(1000 / portTICK_PERIOD_MS);
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continue;
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}
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/* Code to print the resolved IP.
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Note: inet_ntoa is non-reentrant, look at ipaddr_ntoa_r for "real" code */
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ip4_addr = (struct ip4_addr *)hp->h_addr;
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ESP_LOGI(TAG, "DNS lookup succeeded. IP=%s", inet_ntoa(*ip4_addr));
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coap_address_init(&src_addr);
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src_addr.addr.sin.sin_family = AF_INET;
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src_addr.addr.sin.sin_port = htons(0);
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src_addr.addr.sin.sin_addr.s_addr = INADDR_ANY;
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ctx = coap_new_context(&src_addr);
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if (ctx) {
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coap_address_init(&dst_addr);
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dst_addr.addr.sin.sin_family = AF_INET;
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dst_addr.addr.sin.sin_port = htons(COAP_DEFAULT_PORT);
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dst_addr.addr.sin.sin_addr.s_addr = ip4_addr->addr;
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request = coap_new_pdu();
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if (request){
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request->hdr->type = COAP_MESSAGE_CON;
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request->hdr->id = coap_new_message_id(ctx);
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request->hdr->code = get_method;
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coap_add_option(request, COAP_OPTION_URI_PATH, uri.path.length, uri.path.s);
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coap_register_response_handler(ctx, message_handler);
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coap_send_confirmed(ctx, ctx->endpoint, &dst_addr, request);
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flags = fcntl(ctx->sockfd, F_GETFL, 0);
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fcntl(ctx->sockfd, F_SETFL, flags|O_NONBLOCK);
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tv.tv_usec = COAP_DEFAULT_TIME_USEC;
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tv.tv_sec = COAP_DEFAULT_TIME_SEC;
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for(;;) {
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FD_ZERO(&readfds);
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FD_CLR( ctx->sockfd, &readfds );
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FD_SET( ctx->sockfd, &readfds );
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result = select( ctx->sockfd+1, &readfds, 0, 0, &tv );
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if (result > 0) {
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if (FD_ISSET( ctx->sockfd, &readfds ))
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coap_read(ctx);
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} else if (result < 0) {
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break;
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} else {
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ESP_LOGE(TAG, "select timeout");
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}
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}
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}
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coap_free_context(ctx);
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}
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}
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vTaskDelete(NULL);
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}
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static esp_err_t wifi_event_handler(void *ctx, system_event_t *event)
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{
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switch(event->event_id) {
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case SYSTEM_EVENT_STA_START:
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esp_wifi_connect();
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break;
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case SYSTEM_EVENT_STA_GOT_IP:
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xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
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break;
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case SYSTEM_EVENT_STA_DISCONNECTED:
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/* This is a workaround as ESP32 WiFi libs don't currently
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auto-reassociate. */
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esp_wifi_connect();
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xEventGroupClearBits(wifi_event_group, CONNECTED_BIT);
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break;
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default:
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break;
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}
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return ESP_OK;
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}
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static void wifi_conn_init(void)
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{
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tcpip_adapter_init();
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wifi_event_group = xEventGroupCreate();
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ESP_ERROR_CHECK( esp_event_loop_init(wifi_event_handler, NULL) );
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wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
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ESP_ERROR_CHECK( esp_wifi_init(&cfg) );
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ESP_ERROR_CHECK( esp_wifi_set_storage(WIFI_STORAGE_RAM) );
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wifi_config_t wifi_config = {
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.sta = {
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.ssid = EXAMPLE_WIFI_SSID,
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.password = EXAMPLE_WIFI_PASS,
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},
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};
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ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA) );
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ESP_ERROR_CHECK( esp_wifi_set_config(WIFI_IF_STA, &wifi_config) );
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ESP_ERROR_CHECK( esp_wifi_start() );
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}
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void app_main(void)
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{
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ESP_ERROR_CHECK( nvs_flash_init() );
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wifi_conn_init();
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xTaskCreate(coap_example_task, "coap", 2048, NULL, 5, NULL);
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}
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192
examples/coap_server/user/coap_server_example_main.c
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192
examples/coap_server/user/coap_server_example_main.c
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@@ -0,0 +1,192 @@
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/* CoAP server Example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#include <string.h>
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#include <sys/socket.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/event_groups.h"
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#include "esp_log.h"
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#include "esp_wifi.h"
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#include "esp_event_loop.h"
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#include "nvs_flash.h"
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#include "coap.h"
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/* The examples use simple WiFi configuration that you can set via
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'make menuconfig'.
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If you'd rather not, just change the below entries to strings with
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the config you want - ie #define EXAMPLE_WIFI_SSID "mywifissid"
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*/
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#define EXAMPLE_WIFI_SSID CONFIG_WIFI_SSID
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#define EXAMPLE_WIFI_PASS CONFIG_WIFI_PASSWORD
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#define COAP_DEFAULT_TIME_SEC 5
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#define COAP_DEFAULT_TIME_USEC 0
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static EventGroupHandle_t wifi_event_group;
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/* The event group allows multiple bits for each event,
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but we only care about one event - are we connected
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to the AP with an IP? */
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const static int CONNECTED_BIT = BIT0;
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const static char *TAG = "CoAP_server";
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static coap_async_state_t *async = NULL;
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static void
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send_async_response(coap_context_t *ctx, const coap_endpoint_t *local_if)
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{
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coap_pdu_t *response;
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unsigned char buf[3];
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const char* response_data = "Hello World WTF!";
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size_t size = sizeof(coap_hdr_t) + 20;
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response = coap_pdu_init(async->flags & COAP_MESSAGE_CON, COAP_RESPONSE_CODE(205), 0, size);
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response->hdr->id = coap_new_message_id(ctx);
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if (async->tokenlen)
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coap_add_token(response, async->tokenlen, async->token);
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coap_add_option(response, COAP_OPTION_CONTENT_TYPE, coap_encode_var_bytes(buf, COAP_MEDIATYPE_TEXT_PLAIN), buf);
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coap_add_data (response, strlen(response_data), (unsigned char *)response_data);
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if (coap_send(ctx, local_if, &async->peer, response) == COAP_INVALID_TID) {
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}
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coap_delete_pdu(response);
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coap_async_state_t *tmp;
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coap_remove_async(ctx, async->id, &tmp);
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coap_free_async(async);
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async = NULL;
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}
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/*
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* The resource handler
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*/
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static void
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async_handler(coap_context_t *ctx, struct coap_resource_t *resource,
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const coap_endpoint_t *local_interface, coap_address_t *peer,
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coap_pdu_t *request, str *token, coap_pdu_t *response)
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{
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async = coap_register_async(ctx, peer, request, COAP_ASYNC_SEPARATE | COAP_ASYNC_CONFIRM, (void*)"no data");
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}
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static void coap_example_thread(void *p)
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{
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coap_context_t* ctx = NULL;
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coap_address_t serv_addr;
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coap_resource_t* resource = NULL;
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fd_set readfds;
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struct timeval tv;
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int flags = 0;
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while (1) {
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/* Wait for the callback to set the CONNECTED_BIT in the
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event group.
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*/
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xEventGroupWaitBits(wifi_event_group, CONNECTED_BIT,
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false, true, portMAX_DELAY);
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ESP_LOGI(TAG, "Connected to AP");
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/* Prepare the CoAP server socket */
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coap_address_init(&serv_addr);
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serv_addr.addr.sin.sin_family = AF_INET;
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serv_addr.addr.sin.sin_addr.s_addr = INADDR_ANY;
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serv_addr.addr.sin.sin_port = htons(COAP_DEFAULT_PORT);
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ctx = coap_new_context(&serv_addr);
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if (ctx) {
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flags = fcntl(ctx->sockfd, F_GETFL, 0);
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fcntl(ctx->sockfd, F_SETFL, flags|O_NONBLOCK);
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tv.tv_usec = COAP_DEFAULT_TIME_USEC;
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tv.tv_sec = COAP_DEFAULT_TIME_SEC;
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/* Initialize the resource */
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resource = coap_resource_init((unsigned char *)"Espressif", 9, 0);
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if (resource){
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coap_register_handler(resource, COAP_REQUEST_GET, async_handler);
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coap_add_resource(ctx, resource);
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/*For incoming connections*/
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for (;;) {
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FD_ZERO(&readfds);
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FD_CLR( ctx->sockfd, &readfds);
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FD_SET( ctx->sockfd, &readfds);
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int result = select( ctx->sockfd+1, &readfds, 0, 0, &tv );
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if (result > 0){
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if (FD_ISSET( ctx->sockfd, &readfds ))
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coap_read(ctx);
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} else if (result < 0){
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break;
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} else {
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ESP_LOGE(TAG, "select timeout");
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}
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if (async) {
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send_async_response(ctx, ctx->endpoint);
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}
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}
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}
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coap_free_context(ctx);
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}
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}
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vTaskDelete(NULL);
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}
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static esp_err_t wifi_event_handler(void *ctx, system_event_t *event)
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{
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switch(event->event_id) {
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case SYSTEM_EVENT_STA_START:
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esp_wifi_connect();
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break;
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case SYSTEM_EVENT_STA_GOT_IP:
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xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
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break;
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case SYSTEM_EVENT_STA_DISCONNECTED:
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/* This is a workaround as ESP32 WiFi libs don't currently
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auto-reassociate. */
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esp_wifi_connect();
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xEventGroupClearBits(wifi_event_group, CONNECTED_BIT);
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break;
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default:
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break;
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}
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return ESP_OK;
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}
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static void wifi_conn_init(void)
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{
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tcpip_adapter_init();
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wifi_event_group = xEventGroupCreate();
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ESP_ERROR_CHECK( esp_event_loop_init(wifi_event_handler, NULL) );
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wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
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ESP_ERROR_CHECK( esp_wifi_init(&cfg) );
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ESP_ERROR_CHECK( esp_wifi_set_storage(WIFI_STORAGE_RAM) );
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wifi_config_t wifi_config = {
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.sta = {
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.ssid = EXAMPLE_WIFI_SSID,
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.password = EXAMPLE_WIFI_PASS,
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},
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};
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ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA) );
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ESP_ERROR_CHECK( esp_wifi_set_config(WIFI_IF_STA, &wifi_config) );
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ESP_ERROR_CHECK( esp_wifi_start() );
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}
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void app_main(void)
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{
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ESP_ERROR_CHECK( nvs_flash_init() );
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wifi_conn_init();
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xTaskCreate(coap_example_thread, "coap", 2048, NULL, 5, NULL);
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}
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