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arduino-cli/libraries/EMailSender/examples/EMailSenderDistributionList/EMailSenderDistributionList.ino

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+/*
+ * EMailSender library for Arduino, esp8266 and esp32
+ * Simple esp32 Gmail send to a distribution list example
+ *
+ * https://www.mischianti.org/category/my-libraries/emailsender-send-email-with-attachments/
+ *
+ */
+
+#include "Arduino.h"
+#include <EMailSender.h>
+#include <WiFi.h>
+
+uint8_t connection_state = 0;
+uint16_t reconnect_interval = 10000;
+
+EMailSender emailSend("<YOUR-SMTP>", "<YOUR-SMTP-PASSWD>");
+
+uint8_t WiFiConnect(const char* nSSID = nullptr, const char* nPassword = nullptr)
+{
+    static uint16_t attempt = 0;
+    Serial.print("Connecting to ");
+    if(nSSID) {
+        WiFi.begin(nSSID, nPassword);
+        Serial.println(nSSID);
+    }
+
+    uint8_t i = 0;
+    while(WiFi.status()!= WL_CONNECTED && i++ < 50)
+    {
+        delay(200);
+        Serial.print(".");
+    }
+    ++attempt;
+    Serial.println("");
+    if(i == 51) {
+        Serial.print("Connection: TIMEOUT on attempt: ");
+        Serial.println(attempt);
+        if(attempt % 2 == 0)
+            Serial.println("Check if access point available or SSID and Password\r\n");
+        return false;
+    }
+    Serial.println("Connection: ESTABLISHED");
+    Serial.print("Got IP address: ");
+    Serial.println(WiFi.localIP());
+    return true;
+}
+
+void Awaits()
+{
+    uint32_t ts = millis();
+    while(!connection_state)
+    {
+        delay(50);
+        if(millis() > (ts + reconnect_interval) && !connection_state){
+            connection_state = WiFiConnect();
+            ts = millis();
+        }
+    }
+}
+
+void setup()
+{
+    Serial.begin(115200);
+    const char* ssid = "<YOUR-SSID>";
+    const char* password = "<YOUR-PASSWD>";
+
+    connection_state = WiFiConnect(ssid, password);
+    if(!connection_state)  // if not connected to WIFI
+        Awaits();          // constantly trying to connect
+
+    EMailSender::EMailMessage message;
+    message.subject = "Soggetto";
+    message.message = "Ciao come stai<br>io bene.<br>www.mischianti.org";
+
+    // Send to 3 different email
+    const char* arrayOfEmail[] = {"<FIRST>@gmail.com", "<SECOND>@yahoo.com", "<THIRD>@hotmail.com"};
+    EMailSender::Response resp = emailSend.send(arrayOfEmail, 3, message);
+
+//    // Send to 3 different email, 2 in C and 1 in CC
+//    const char* arrayOfEmail[] = {"<FIRST>@gmail.com", "<SECOND>@yahoo.com", "<THIRD>@hotmail.com"};
+//    EMailSender::Response resp = emailSend.send(arrayOfEmail, 2, 1, message);
+//
+//    // Send to 3 different email first to C second to CC and third to CCn
+//    const char* arrayOfEmail[] = {"<FIRST>@gmail.com", "<SECOND>@yahoo.com", "<THIRD>@hotmail.com"};
+//    EMailSender::Response resp = emailSend.send(arrayOfEmail, 3, message);
+
+
+    Serial.println("Sending status: ");
+
+    Serial.println(resp.status);
+    Serial.println(resp.code);
+    Serial.println(resp.desc);
+}
+
+void loop()
+{
+
+}