代碼下載地址：
https://download.csdn.net/download/qq_31806069/11239781

1、 先搭建一個HTTP服務(wù)器
先將hello_wordl例子拷貝到~/esp中威始，在hello_wordl/build中創(chuàng)建get文件夾蟹地，且將hello-world.bin 放進去袄简。

cp -r $IDF_PATH/examples/get-started/hello_world .
cd hello_world/build/
 mkdir get
 cd get/
cp ~/esp/hello_world/build/hello-world.bin .
 cd ..
python -m SimpleHTTPServer 8070

提示：
1.1推沸、服務(wù)器運行后竭缝，構(gòu)建目錄的內(nèi)容可以通過網(wǎng)址 http://localhost:8070/ 瀏覽到希太。
1.2、將你的 PC 連接到你將會在 ESP32 上面使用的同一個 AP琅锻。

2卦停、 先將hello-world.bin 拷貝到~/esp中且命名"my_ota"
a向胡、 先配置menuconfig
make menuconfig
--Serial flasher conifg --->
----Default serial port
------COM3
--Partition Table --->
----Partition Table (Factory app, two OTA definitions) --->
------選擇Factory app,two OTA definitions

b、先添加文件
app_wifi.c
app_wifi.h
esp_https_ota.c
esp_https_ota.h

c惊完、 修改代碼

#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_system.h"
#include "esp_spi_flash.h"

#include "nvs_flash.h"
#include "app_wifi.h"
#include "esp_log.h"
#include "esp_http_client.h"
#include "esp_https_ota.h"

static const char *TAG = "MY_OTA";


esp_err_t _http_event_handler(esp_http_client_event_t *evt)
{
    switch(evt->event_id)
    {
    case HTTP_EVENT_ERROR:
        ESP_LOGD(TAG, "HTTP_EVENT_ERROR");
        break;
    case HTTP_EVENT_ON_CONNECTED:
        ESP_LOGD(TAG, "HTTP_EVENT_ON_CONNECTED");
        break;
    case HTTP_EVENT_HEADER_SENT:
        ESP_LOGD(TAG, "HTTP_EVENT_HEADER_SENT");
        break;
    case HTTP_EVENT_ON_HEADER:
        ESP_LOGD(TAG, "HTTP_EVENT_ON_HEADER, key=%s, value=%s", evt->header_key, evt->header_value);
        break;
    case HTTP_EVENT_ON_DATA:
        ESP_LOGD(TAG, "HTTP_EVENT_ON_DATA, len=%d", evt->data_len);
        if (!esp_http_client_is_chunked_response(evt->client))
        {
            // Write out data
            //printf("%.*s", evt->data_len, (char*)evt->data);
        }
        break;
    case HTTP_EVENT_ON_FINISH:
        ESP_LOGD(TAG, "HTTP_EVENT_ON_FINISH");
        break;
    case HTTP_EVENT_DISCONNECTED:
        ESP_LOGD(TAG, "HTTP_EVENT_DISCONNECTED");
        break;
    }
    return ESP_OK;
}


static void http_test_task(void *pvParameters)
{
    esp_http_client_config_t config =
    {
        //.url = "http://192.168.20.96:8070/get/5FD8.bin",
        .url = "http://192.168.20.96:8070/get/hello-world.bin",
        .event_handler = _http_event_handler,
    };

    esp_err_t ret = esp_https_ota(&config);
    if (ret == ESP_OK) {
        esp_restart();
    } else {
        ESP_LOGE(TAG, "Firmware Upgrades Failed:%d\n",ret);
    }
    while (1) {
        vTaskDelay(1000 / portTICK_PERIOD_MS);
    }

}

void app_main()
{
    printf("Hello world!\n");
    esp_err_t ret = nvs_flash_init();
    if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND)
    {
        ESP_ERROR_CHECK(nvs_flash_erase());
        ret = nvs_flash_init();
    }

    ESP_ERROR_CHECK(ret);
    app_wifi_initialise();

    ESP_LOGI(TAG, "1------------------>Connected to AP, begin http example\n");
    app_wifi_wait_connected();
    ESP_LOGI(TAG, "2------------------>Connected to AP, begin http example\n");
    xTaskCreate(&http_test_task, "http_test_task", 8192, NULL, 5, NULL);

    while(1)
    {
        vTaskDelay(1000 / portTICK_PERIOD_MS);
    }

    printf("Restarting now.\n");
    fflush(stdout);
    esp_restart();
}

d僵芹、修改esp_https_ota.c文件中函數(shù)
esp_err_t esp_https_ota(constesp_http_client_config_t *config)，將幾條語句屏蔽小槐。

/*
    if (!config->cert_pem)
    {
        ESP_LOGE(TAG, "Server certificate not found in esp_http_client config");
        return ESP_FAIL;
    }
*/

3拇派、 測試
a、make erase_flash flash monitor

image.png

可以看到已經(jīng)開始在運行hello-world.bin的例子凿跳。

image.png