5cb04f3e13
- Added a example test that connects to a local python websocket server. - Added readme for websocket_client example. Closes IDF-907
131 lines
4 KiB
C
131 lines
4 KiB
C
/* ESP HTTP 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 <stdio.h>
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#include "esp_wifi.h"
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#include "esp_system.h"
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#include "nvs_flash.h"
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#include "esp_event_loop.h"
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#include "protocol_examples_common.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_websocket_client.h"
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#include "esp_event.h"
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#include "esp_event_loop.h"
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static const char *TAG = "WEBSOCKET";
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#if CONFIG_WEBSOCKET_URI_FROM_STDIN
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static void get_string(char *line, size_t size)
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{
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int count = 0;
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while (count < size) {
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int c = fgetc(stdin);
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if (c == '\n') {
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line[count] = '\0';
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break;
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} else if (c > 0 && c < 127) {
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line[count] = c;
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++count;
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}
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vTaskDelay(10 / portTICK_PERIOD_MS);
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}
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}
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#endif /* CONFIG_WEBSOCKET_URI_FROM_STDIN */
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static void websocket_event_handler(void *handler_args, esp_event_base_t base, int32_t event_id, void *event_data)
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{
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esp_websocket_event_data_t *data = (esp_websocket_event_data_t *)event_data;
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switch (event_id) {
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case WEBSOCKET_EVENT_CONNECTED:
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ESP_LOGI(TAG, "WEBSOCKET_EVENT_CONNECTED");
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break;
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case WEBSOCKET_EVENT_DISCONNECTED:
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ESP_LOGI(TAG, "WEBSOCKET_EVENT_DISCONNECTED");
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break;
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case WEBSOCKET_EVENT_DATA:
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ESP_LOGI(TAG, "WEBSOCKET_EVENT_DATA");
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ESP_LOGI(TAG, "Received opcode=%d", data->op_code);
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ESP_LOGW(TAG, "Received=%.*s\r\n", data->data_len, (char*)data->data_ptr);
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break;
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case WEBSOCKET_EVENT_ERROR:
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ESP_LOGI(TAG, "WEBSOCKET_EVENT_ERROR");
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break;
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}
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}
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static void websocket_app_start(void)
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{
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esp_websocket_client_config_t websocket_cfg = {};
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#if CONFIG_WEBSOCKET_URI_FROM_STDIN
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char line[128];
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ESP_LOGI(TAG, "Please enter uri of websocket endpoint");
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get_string(line, sizeof(line));
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websocket_cfg.uri = line;
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ESP_LOGI(TAG, "Endpoint uri: %s\n", line);
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#else
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websocket_cfg.uri = CONFIG_WEBSOCKET_URI;
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#endif /* CONFIG_WEBSOCKET_URI_FROM_STDIN */
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ESP_LOGI(TAG, "Connecting to %s...", websocket_cfg.uri);
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esp_websocket_client_handle_t client = esp_websocket_client_init(&websocket_cfg);
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esp_websocket_register_events(client, WEBSOCKET_EVENT_ANY, websocket_event_handler, (void *)client);
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esp_websocket_client_start(client);
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char data[32];
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int i = 0;
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while (i < 10) {
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if (esp_websocket_client_is_connected(client)) {
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int len = sprintf(data, "hello %04d", i++);
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ESP_LOGI(TAG, "Sending %s", data);
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esp_websocket_client_send(client, data, len, portMAX_DELAY);
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}
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vTaskDelay(1000 / portTICK_RATE_MS);
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}
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// Give server some time to respond before closing
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vTaskDelay(3000 / portTICK_RATE_MS);
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esp_websocket_client_stop(client);
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ESP_LOGI(TAG, "Websocket Stopped");
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esp_websocket_client_destroy(client);
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}
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void app_main()
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{
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ESP_LOGI(TAG, "[APP] Startup..");
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ESP_LOGI(TAG, "[APP] Free memory: %d bytes", esp_get_free_heap_size());
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ESP_LOGI(TAG, "[APP] IDF version: %s", esp_get_idf_version());
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esp_log_level_set("*", ESP_LOG_INFO);
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esp_log_level_set("WEBSOCKET_CLIENT", ESP_LOG_DEBUG);
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esp_log_level_set("TRANS_TCP", ESP_LOG_DEBUG);
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ESP_ERROR_CHECK(nvs_flash_init());
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tcpip_adapter_init();
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ESP_ERROR_CHECK(esp_event_loop_create_default());
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/* This helper function configures Wi-Fi or Ethernet, as selected in menuconfig.
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* Read "Establishing Wi-Fi or Ethernet Connection" section in
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* examples/protocols/README.md for more information about this function.
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*/
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ESP_ERROR_CHECK(example_connect());
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websocket_app_start();
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}
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