mirror of
https://github.com/espressif/esp-idf.git
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110 lines
3.6 KiB
C
110 lines
3.6 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.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 "idf.py menuconfig"*/
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#define DEFAULT_SSID CONFIG_EXAMPLE_WIFI_SSID
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#define DEFAULT_PWD CONFIG_EXAMPLE_WIFI_PASSWORD
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#define DEFAULT_LISTEN_INTERVAL CONFIG_EXAMPLE_WIFI_LISTEN_INTERVAL
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#if CONFIG_EXAMPLE_POWER_SAVE_MIN_MODEM
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#define DEFAULT_PS_MODE WIFI_PS_MIN_MODEM
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#elif CONFIG_EXAMPLE_POWER_SAVE_MAX_MODEM
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#define DEFAULT_PS_MODE WIFI_PS_MAX_MODEM
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#elif CONFIG_EXAMPLE_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 void event_handler(void* arg, esp_event_base_t event_base,
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int32_t event_id, void* event_data)
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{
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if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
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esp_wifi_connect();
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} else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
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esp_wifi_connect();
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} else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
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ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;
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ESP_LOGI(TAG, "got ip: " IPSTR, IP2STR(&event->ip_info.ip));
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}
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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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esp_netif_init();
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ESP_ERROR_CHECK(esp_event_loop_create_default());
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esp_netif_t *sta_netif = esp_netif_create_default_wifi_sta();
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assert(sta_netif);
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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_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL));
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ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL));
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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(void)
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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 || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
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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:
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// maximum and minimum frequencies are set in sdkconfig,
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// automatic light sleep is enabled if tickless idle support is enabled.
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esp_pm_config_esp32_t pm_config = {
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.max_freq_mhz = CONFIG_EXAMPLE_MAX_CPU_FREQ_MHZ,
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.min_freq_mhz = CONFIG_EXAMPLE_MIN_CPU_FREQ_MHZ,
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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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