mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
/* Power save 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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/*
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this example shows how to use power save mode
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set a router or a AP using the same SSID&PASSWORD as configuration of this example.
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start esp32 and when it connected to AP it will enter power save mode
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*/
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#include "freertos/FreeRTOS.h"
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#include "freertos/event_groups.h"
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#include "esp_wifi.h"
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#include "esp_log.h"
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#include "esp_event_loop.h"
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#include "esp_pm.h"
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#include "nvs_flash.h"
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/*set the ssid and password via "make menuconfig"*/
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#define DEFAULT_SSID CONFIG_WIFI_SSID
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#define DEFAULT_PWD CONFIG_WIFI_PASSWORD
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#define DEFAULT_LISTEN_INTERVAL CONFIG_WIFI_LISTEN_INTERVAL
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#if CONFIG_POWER_SAVE_MIN_MODEM
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#define DEFAULT_PS_MODE WIFI_PS_MIN_MODEM
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#elif CONFIG_POWER_SAVE_MAX_MODEM
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#define DEFAULT_PS_MODE WIFI_PS_MAX_MODEM
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#elif CONFIG_POWER_SAVE_NONE
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#define DEFAULT_PS_MODE WIFI_PS_NONE
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#else
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#define DEFAULT_PS_MODE WIFI_PS_NONE
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#endif /*CONFIG_POWER_SAVE_MODEM*/
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static const char *TAG = "power_save";
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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_LOGI(TAG, "SYSTEM_EVENT_STA_START");
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ESP_ERROR_CHECK(esp_wifi_connect());
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break;
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case SYSTEM_EVENT_STA_GOT_IP:
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ESP_LOGI(TAG, "SYSTEM_EVENT_STA_GOT_IP");
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ESP_LOGI(TAG, "got ip:%s\n",
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ip4addr_ntoa(&event->event_info.got_ip.ip_info.ip));
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break;
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case SYSTEM_EVENT_STA_DISCONNECTED:
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ESP_LOGI(TAG, "SYSTEM_EVENT_STA_DISCONNECTED");
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ESP_ERROR_CHECK(esp_wifi_connect());
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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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/*init wifi as sta and set power save mode*/
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static void wifi_power_save(void)
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{
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tcpip_adapter_init();
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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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wifi_config_t wifi_config = {
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.sta = {
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.ssid = DEFAULT_SSID,
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.password = DEFAULT_PWD,
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.listen_interval = DEFAULT_LISTEN_INTERVAL,
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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(ESP_IF_WIFI_STA, &wifi_config));
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ESP_ERROR_CHECK(esp_wifi_start());
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ESP_LOGI(TAG, "esp_wifi_set_ps().");
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esp_wifi_set_ps(DEFAULT_PS_MODE);
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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 ret = nvs_flash_init();
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if (ret == ESP_ERR_NVS_NO_FREE_PAGES) {
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ESP_ERROR_CHECK(nvs_flash_erase());
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ret = nvs_flash_init();
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}
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ESP_ERROR_CHECK( ret );
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#if CONFIG_PM_ENABLE
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// Configure dynamic frequency scaling: maximum frequency is set in sdkconfig,
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// minimum frequency is XTAL.
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rtc_cpu_freq_t max_freq;
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rtc_clk_cpu_freq_from_mhz(CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ, &max_freq);
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esp_pm_config_esp32_t pm_config = {
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.max_cpu_freq = max_freq,
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.min_cpu_freq = RTC_CPU_FREQ_XTAL,
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#if CONFIG_FREERTOS_USE_TICKLESS_IDLE
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.light_sleep_enable = true
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#endif
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};
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ESP_ERROR_CHECK( esp_pm_configure(&pm_config) );
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#endif // CONFIG_PM_ENABLE
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wifi_power_save();
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}
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