148 lines
4.6 KiB
C
148 lines
4.6 KiB
C
/* OTA 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 "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_system.h"
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#include "esp_wifi.h"
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#include "esp_event_loop.h"
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#include "esp_log.h"
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#include "esp_ota_ops.h"
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#include "esp_http_client.h"
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#include "esp_https_ota.h"
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#include "nvs.h"
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#include "nvs_flash.h"
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static const char *TAG = "simple_ota_example";
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extern const uint8_t server_cert_pem_start[] asm("_binary_ca_cert_pem_start");
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extern const uint8_t server_cert_pem_end[] asm("_binary_ca_cert_pem_end");
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/* FreeRTOS event group to signal when we are connected & ready to make a request */
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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 int CONNECTED_BIT = BIT0;
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esp_err_t _http_event_handler(esp_http_client_event_t *evt)
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{
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switch(evt->event_id) {
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case HTTP_EVENT_ERROR:
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ESP_LOGD(TAG, "HTTP_EVENT_ERROR");
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break;
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case HTTP_EVENT_ON_CONNECTED:
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ESP_LOGD(TAG, "HTTP_EVENT_ON_CONNECTED");
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break;
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case HTTP_EVENT_HEADER_SENT:
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ESP_LOGD(TAG, "HTTP_EVENT_HEADER_SENT");
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break;
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case HTTP_EVENT_ON_HEADER:
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ESP_LOGD(TAG, "HTTP_EVENT_ON_HEADER, key=%s, value=%s", evt->header_key, evt->header_value);
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break;
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case HTTP_EVENT_ON_DATA:
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ESP_LOGD(TAG, "HTTP_EVENT_ON_DATA, len=%d", evt->data_len);
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break;
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case HTTP_EVENT_ON_FINISH:
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ESP_LOGD(TAG, "HTTP_EVENT_ON_FINISH");
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break;
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case HTTP_EVENT_DISCONNECTED:
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ESP_LOGD(TAG, "HTTP_EVENT_DISCONNECTED");
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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 esp_err_t 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 initialise_wifi(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(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 = CONFIG_WIFI_SSID,
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.password = CONFIG_WIFI_PASSWORD,
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},
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};
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ESP_LOGI(TAG, "Setting WiFi configuration SSID %s...", wifi_config.sta.ssid);
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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(ESP_IF_WIFI_STA, &wifi_config) );
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ESP_ERROR_CHECK( esp_wifi_start() );
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}
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void simple_ota_example_task(void * pvParameter)
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{
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ESP_LOGI(TAG, "Starting OTA example...");
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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, "Connect to Wifi ! Start to Connect to Server....");
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esp_http_client_config_t config = {
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.url = CONFIG_FIRMWARE_UPGRADE_URL,
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.cert_pem = (char *)server_cert_pem_start,
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.event_handler = _http_event_handler,
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};
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esp_err_t ret = esp_https_ota(&config);
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if (ret == ESP_OK) {
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esp_restart();
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} else {
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ESP_LOGE(TAG, "Firmware Upgrades Failed");
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}
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while (1) {
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vTaskDelay(1000 / portTICK_PERIOD_MS);
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}
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}
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void app_main()
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{
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// Initialize NVS.
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esp_err_t err = nvs_flash_init();
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if (err == ESP_ERR_NVS_NO_FREE_PAGES) {
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// OTA app partition table has a smaller NVS partition size than the non-OTA
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// partition table. This size mismatch may cause NVS initialization to fail.
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// If this happens, we erase NVS partition and initialize NVS again.
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ESP_ERROR_CHECK(nvs_flash_erase());
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err = nvs_flash_init();
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}
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ESP_ERROR_CHECK( err );
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initialise_wifi();
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xTaskCreate(&simple_ota_example_task, "ota_example_task", 8192, NULL, 5, NULL);
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}
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