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deep sleep: add note about disabling WiFi and BT

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This change adds a note to esp_deep_sleep that applications should disable WiFi and BT before going into deep sleep.
SNTP example is also updated.
This commit is contained in:
Ivan Grokhotkov 2017-02-21 12:29:25 +08:00
parent d3fde5188e
commit 26dec992eb
2 changed files with 10 additions and 0 deletions
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8
components/esp32/include/esp_deep_sleep.h
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@ -164,6 +164,14 @@ void esp_deep_sleep_start() __attribute__((noreturn));
* Call to this function is equivalent to a call to esp_deep_sleep_enable_timer_wakeup * Call to this function is equivalent to a call to esp_deep_sleep_enable_timer_wakeup
* followed by a call to esp_deep_sleep_start. * followed by a call to esp_deep_sleep_start.
* *
* esp_deep_sleep does not shut down WiFi, BT, and higher level protocol
* connections gracefully.
* Make sure relevant WiFi and BT stack functions are called to close any
* connections and deinitialize the peripherals. These include:
* - esp_bluedroid_disable
* - esp_bt_controller_disable
* - esp_wifi_stop
*
* This function does not return. * This function does not return.
* *
* @param time_in_us deep-sleep time, unit: microsecond * @param time_in_us deep-sleep time, unit: microsecond

2
examples/protocols/sntp/main/sntp_main.c
View File

@ -110,6 +110,8 @@ static void obtain_time(void)
time(&now); time(&now);
localtime_r(&now, &timeinfo); localtime_r(&now, &timeinfo);
} }
ESP_ERROR_CHECK( esp_wifi_stop() );
} }
static void initialize_sntp(void) static void initialize_sntp(void)