Create Sub-program to call an Email Send.

[Lnt3gr4]

Hi, I would like to know if its possible to put an Email Request on demand.
Ex. : In a sub-program, void Email_send with all the email config, header and message, then when Email_send program is called in the void Loop() section, the program send the email then return to the loop.

I would like that SMTP_session started in this sub-program so that everytime it's been called, the email session connection to server is renewed.

Thanks

[mobizt]

You can define and use SMTPSession and SMTP_Message as local variables in your function.

SMTPSession will allocate the memory used by internal SSL client and user and program data which it used much memory while the session was opened for the connection.

[Lnt3gr4]

I have this problem after a certain time, (more than 3 hours) i cannot send my email on trigger because of connection closed.

Here's the loop part of my code :

void loop()
{
pump_output = digitalRead(pumpPin);
hlev_output = digitalRead(hlevPin);
if (pump_output == LOW)
{ message.text.content = String("Probleme d'aeration!");
//----Start sending Email and close the session
if (!MailClient.sendMail(&smtp, &message))
Serial.println("Error sending Email, " + smtp.errorReason());
Serial.println("Probleme Aeration!");
Serial.println("Email sent");
delay(5000);
}

else {
Serial.println("Aeration OK");
}
delay(1000);
ESP_MAIL_PRINTF("Free Heap: %d\n", MailClient.getFreeHeap());
//to clear sending result log
smtp.sendingResult.clear();

Is there a command I should add in my loop section to stop getting this connection closed error . (Like a wifi reconnect or revive the smtp connection of something ?) thanks

[mobizt]

This is not error and it's normal. You can't connect to server forever.

It is normal when the mail server closes the connection or internet connection interrupted, the connection will close.

[Lnt3gr4]

Ok then , what would be the solution to renew the connection ? I tried different commands but none of them worked. I want to be sure that if my program trigger an alarm, email will be send, and not having an error because of Connection Closed. For the wifi, I saw a wifi reconnect() function in Wifi Manager , this could fix the wifi lost connection problem, but for the email server, is there a way to renwe the email session during loop ( on event trigger like in my code ) ? Obtenir Outlook pour Android<https://aka.ms/AAb9ysg>

…

________________________________ From: Suwatchai K. ***@***.***> Sent: Tuesday, November 22, 2022 10:36:05 AM To: mobizt/ESP-Mail-Client ***@***.***> Cc: Lnt3gr4 ***@***.***>; Author ***@***.***> Subject: Re: [mobizt/ESP-Mail-Client] Create Sub-program to call an Email Send. (Discussion #208) This is not error and it's normal. You can't connect to server forever. It is normal when the mail server closes the connection or internet connection interrupted, the connection will close. — Reply to this email directly, view it on GitHub<#208 (reply in thread)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/A4DLWBY25Q5B67YY2EFEYMTWJTR6LANCNFSM6AAAAAASDVOSMU>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[mobizt]

Did you ever read the readme of the repository homepage?

Library implemented the session (authentication state) since first release that it can be reused and allow user to control it by.

1. By assign the last Boolean parameter to the function sendMail and readMail, or
2. By calling smtp.closeSession(); and imap.closeSession();

You should read this for the description of available functions which already stated in the README doc.