Prvni ulozeni z chegewara githubu

libraries/ESP32/examples/DeepSleep/TouchWakeUp/TouchWakeUp.ino

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+/*
+Deep Sleep with Touch Wake Up
+=====================================
+This code displays how to use deep sleep with
+a touch 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.
+
+Author:
+Pranav Cherukupalli <cherukupallip@gmail.com>
+*/
+
+#define Threshold 40 /* Greater the value, more the sensitivity */
+
+RTC_DATA_ATTR int bootCount = 0;
+touch_pad_t touchPin;
+/*
+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;
+  }
+}
+
+/*
+Method to print the touchpad by which ESP32
+has been awaken from sleep
+*/
+void print_wakeup_touchpad(){
+  touchPin = esp_sleep_get_touchpad_wakeup_status();
+
+  switch(touchPin)
+  {
+    case 0  : Serial.println("Touch detected on GPIO 4"); break;
+    case 1  : Serial.println("Touch detected on GPIO 0"); break;
+    case 2  : Serial.println("Touch detected on GPIO 2"); break;
+    case 3  : Serial.println("Touch detected on GPIO 15"); break;
+    case 4  : Serial.println("Touch detected on GPIO 13"); break;
+    case 5  : Serial.println("Touch detected on GPIO 12"); break;
+    case 6  : Serial.println("Touch detected on GPIO 14"); break;
+    case 7  : Serial.println("Touch detected on GPIO 27"); break;
+    case 8  : Serial.println("Touch detected on GPIO 33"); break;
+    case 9  : Serial.println("Touch detected on GPIO 32"); break;
+    default : Serial.println("Wakeup not by touchpad"); break;
+  }
+}
+
+void callback(){
+  //placeholder callback function
+}
+
+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 and touchpad too
+  print_wakeup_reason();
+  print_wakeup_touchpad();
+
+  //Setup interrupt on Touch Pad 3 (GPIO15)
+  touchAttachInterrupt(T3, callback, Threshold);
+
+  //Configure Touchpad as wakeup source
+  esp_sleep_enable_touchpad_wakeup();
+
+  //Go to sleep now
+  Serial.println("Going to sleep now");
+  esp_deep_sleep_start();
+  Serial.println("This will never be printed");
+}
+
+void loop(){
+  //This will never be reached
+}