1.3mA sleep current when using EXT0 together with time wakeup (5uA if timer only)
Posted: Mon Jul 22, 2019 3:23 pm
Hi,
I would like to use both timer and ext0 as deep-sleep wake up source. With Timer only, I can achieve 5uA as expected. But when I enable ext0, the sleep current jumps to 1.3mA! I understand the doc says RTC_IO peripherals must be powered to use the ext0 wake up, but does it use that much current?!
I use the esp32-arduino framework and here is my code :
I would like to use both timer and ext0 as deep-sleep wake up source. With Timer only, I can achieve 5uA as expected. But when I enable ext0, the sleep current jumps to 1.3mA! I understand the doc says RTC_IO peripherals must be powered to use the ext0 wake up, but does it use that much current?!
I use the esp32-arduino framework and here is my code :
Code: Select all
#include <WiFi.h>
#include "driver/rtc_io.h"
#define PIN_IRQ (27)
#define PERIOD (10)
/*Comment this to use timer only*/
#define EXT_WAKE_UP
void setup()
{
rtc_gpio_deinit((gpio_num_t)PIN_IRQ);
Serial.begin(115200);
print_wakeup_reason();
Serial.println("Start");
esp_sleep_disable_wakeup_source(ESP_SLEEP_WAKEUP_ALL);
esp_sleep_enable_timer_wakeup(uint64_t(PERIOD * 1000000));
#ifdef EXT_WAKE_UP
esp_sleep_enable_ext0_wakeup((gpio_num_t)PIN_IRQ, 1);
#endif
WiFi.setAutoReconnect(false);
WiFi.mode(WIFI_STA);
WiFi.disconnect();
}
void loop()
{
//do things
delay(5000);
Serial.println("Go to sleep...");
Serial.flush();
esp_deep_sleep_start();
}
void print_wakeup_reason() {
esp_sleep_wakeup_cause_t wakeup_reason;
wakeup_reason = esp_sleep_get_wakeup_cause();
switch (wakeup_reason)
{
case ESP_SLEEP_WAKEUP_EXT0 : Serial.println("Wakeup caused by external signal using RTC_IO"); break;
case ESP_SLEEP_WAKEUP_EXT1 : Serial.println("Wakeup caused by external signal using RTC_CNTL"); break;
case ESP_SLEEP_WAKEUP_TIMER : Serial.println("Wakeup caused by timer"); break;
case ESP_SLEEP_WAKEUP_TOUCHPAD : Serial.println("Wakeup caused by touchpad"); break;
case ESP_SLEEP_WAKEUP_ULP : Serial.println("Wakeup caused by ULP program"); break;
default : Serial.printf("Wakeup was not caused by deep sleep: %d\n", wakeup_reason); break;
}
}