Initial Implementation Mailbox Monitor

src/main.cpp

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+#include <Arduino.h>
+#include <WiFi.h>
+#include <WiFiClientSecure.h>
+#include <ArduinoJson.h>
+
+#define ONBOARD_LED  2
+#define uS_TO_mS_FACTOR 1000
+#define BUTTON_PIN_BITMASK 0x200000000 // 2^33 in hex
+
+RTC_RODATA_ATTR int bootCount=0;
+
+// Wifi network credentials
+const char* ssid = "JoNelsDarlings";
+const char* password = "Paris2016";
+esp_sleep_wakeup_cause_t wakeup_reason;
+
+void print_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 connect_wifi(){
+  WiFi.mode(WIFI_STA);
+  WiFi.begin(ssid, password);
+  
+  while (WiFi.status() != WL_CONNECTED) {
+    Serial.print(".");
+    digitalWrite(ONBOARD_LED,HIGH);
+    delay(100);
+    digitalWrite(ONBOARD_LED,LOW);
+    delay(400);
+  }
+
+  Serial.println("");
+  Serial.println("WiFi connected");
+  digitalWrite(ONBOARD_LED,HIGH);
+  Serial.print("IP address: ");
+  Serial.println(WiFi.localIP());
+}
+
+void send_notification(){
+  Serial.println("Sending Notification.");
+  WiFiClientSecure client;
+  client.setInsecure(); // NOT RECOMMENDED
+  const char* host="deadswitch.kawomi.com";
+  const int port=443;
+  if (!client.connect(host,port)) {
+    Serial.println("connection failed");
+
+    //blink the led to indicate the failed connection.....
+    for (int i=0;i<=5;i++) {
+        Serial.print("!");
+        digitalWrite(ONBOARD_LED,HIGH);
+        delay(1000*i);
+        digitalWrite(ONBOARD_LED,LOW);
+        delay(100);
+    }
+    return;
+  }
+
+  String url = "/api/v1?topic=mailbox.livorno.address&secs=0&email=joerg.tretter@gmail.com";
+  Serial.print("Requesting URL: ");
+  Serial.println(url);
+  client.print(String("POST ") + url + " HTTP/1.1\r\n" +
+                  "Host: " + host + "\r\n" +
+                  "Content-Type: application/x-www-form-urlencoded\r\n" +
+                  "Content-Length: 14\r\n\r\n" +
+                  "platform=esp32\r\n");
+
+}
+
+void setup() {
+  bootCount++;
+  Serial.begin(9600);
+  pinMode(ONBOARD_LED,OUTPUT);
+
+  delay(2000); // just a bit of time to start logging..
+  Serial.printf("Boot #: %d\n",bootCount);
+  print_wakeup_reason();
+
+  /* if (bootCount % 2 == 0){
+    digitalWrite(ONBOARD_LED,HIGH);
+    delay(100);
+  } else {
+    digitalWrite(ONBOARD_LED,LOW);
+  } */
+
+  wakeup_reason = esp_sleep_get_wakeup_cause();
+
+  if(wakeup_reason==ESP_SLEEP_WAKEUP_EXT0){  
+    connect_wifi();
+    send_notification();
+  } else {
+    Serial.println("Regular boot, going into deep sleep.");
+  }
+
+
+  //esp_sleep_enable_timer_wakeup(30000*uS_TO_mS_FACTOR);
+  esp_sleep_enable_ext0_wakeup(GPIO_NUM_33,1); //1 = High, 0 = Low
+  
+  Serial.println("Going to sleep now");
+  delay(1000);
+  esp_deep_sleep_start();
+}
+
+void loop() {
+  /* When dealing with deep sleep, it looks like the esp will go back into setup... */
+  
+/*  delay(1000);
+  digitalWrite(ONBOARD_LED,HIGH);
+  delay(100);
+  digitalWrite(ONBOARD_LED,LOW); */
+}