Prvni ulozeni z chegewara githubu

libraries/ESP32/examples/DeepSleep/ExternalWakeUp/ExternalWakeUp.ino

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+/*
+Deep Sleep with External Wake Up
+=====================================
+This code displays how to use deep sleep with
+an external trigger as a wake up source and how
+to store data in RTC memory to use it over reboots
+
+This code is under Public Domain License.
+
+Hardware Connections
+======================
+Push Button to GPIO 33 pulled down with a 10K Ohm
+resistor
+
+NOTE:
+======
+Only RTC IO can be used as a source for external wake
+source. They are pins: 0,2,4,12-15,25-27,32-39.
+
+Author:
+Pranav Cherukupalli <cherukupallip@gmail.com>
+*/
+
+#define BUTTON_PIN_BITMASK 0x200000000 // 2^33 in hex
+
+RTC_DATA_ATTR int bootCount = 0;
+
+/*
+Method to print the reason by which ESP32
+has been awaken from sleep
+*/
+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;
+  }
+}
+
+void setup(){
+  Serial.begin(115200);
+  delay(1000); //Take some time to open up the Serial Monitor
+
+  //Increment boot number and print it every reboot
+  ++bootCount;
+  Serial.println("Boot number: " + String(bootCount));
+
+  //Print the wakeup reason for ESP32
+  print_wakeup_reason();
+
+  /*
+  First we configure the wake up source
+  We set our ESP32 to wake up for an external trigger.
+  There are two types for ESP32, ext0 and ext1 .
+  ext0 uses RTC_IO to wakeup thus requires RTC peripherals
+  to be on while ext1 uses RTC Controller so doesnt need
+  peripherals to be powered on.
+  Note that using internal pullups/pulldowns also requires
+  RTC peripherals to be turned on.
+  */
+  esp_sleep_enable_ext0_wakeup(GPIO_NUM_33,1); //1 = High, 0 = Low
+
+  //If you were to use ext1, you would use it like
+  //esp_sleep_enable_ext1_wakeup(BUTTON_PIN_BITMASK,ESP_EXT1_WAKEUP_ANY_HIGH);
+
+  //Go to sleep now
+  Serial.println("Going to sleep now");
+  esp_deep_sleep_start();
+  Serial.println("This will never be printed");
+}
+
+void loop(){
+  //This is not going to be called
+}