WiFiManager and Wemos d1 esp8266 sending mail problem

This topic has 15 replies, 2 voices, and was last updated 3 years, 1 month ago by Renzo Mischianti.

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- 28 February 2022 at 16:15 #18969
  claudacate
  Participant
  Total newbie here. I just can’t figure out why I can’t connect to the smtp server. I have used the app password. Can someone take a look for me? here is my code. Thanks for the assist
```
#include <WiFiClient.h> 
#include <WiFiManager.h>          //https://github.com/tzapu/WiFiManager
#include <TimeLib.h> 
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <strings_en.h>
#include <ESP8266mDNS.h>

#include <ESP_EEPROM.h>
#include "Arduino.h"
//wifi,email, internet
#include <EMailSender.h>
//#include <ArduinoJson.h>
//
#include "mainPage.h"
#include <Wire.h>
#include <Beastdevices_INA3221.h>

//Wifi setting

#define AP_SSID "custom" // custom filter roller SSID
#define AP_PWD  "1234567890"      // custom passowrd

ESP8266WebServer server(80);
WiFiManager wm;                 

char email_to[32] = "";
char email_login[32] = "";   //these are stored in EEPROM after input from web
char email_password[32] = "";

EMailSender emailSend(email_login, email_password);    
void setup() {
 
  EEPROM.begin (120);
 
  
//Wifi setup
  WiFi.mode(WIFI_STA); //set wifi toSTA；default STA+AP
  wm.setConfigPortalBlocking(false);
  wm.setConfigPortalTimeout(60);

    //automatically connect using saved credentials if they exist
    //If connection fails it starts an access point with the specified name
  // check if stored connection info is correct
  if (wm.autoConnect(AP_SSID, AP_PWD)) {
    Serial.println("\Connection data is correct！");
     Serial.println(WiFi.localIP());
  } else {
    Serial.println("\Connection data is incorrect…");
  }

//wm.startConfigPortal();

 
EMailSender::EMailMessage message;
    message.subject = "Float sensor may be stuck";
    message.message = "Float sensor may be stuck, motor disabled until float sensor is resetted";
    EMailSender::Response resp = emailSend.send(email_to, message);
    Serial.println("Sending status: ");
    Serial.println(resp.status);
    Serial.println(resp.code);
    Serial.println(resp.desc);
};
```
  - This topic was modified 1 year, 8 months ago by Renzo Mischianti.
- 28 February 2022 at 22:14 #18979
  Renzo Mischianti
  Keymaster
  Hi Claudacate,
  can you send me the Serial output, the name of the provider and I must verify If WiFiManager set the DNS also or like some time ago It has a problem with the setting of DNS.
  
  How to manage dynamic WIFI configuration on esp8266 or esp32
  
  Bye Renzo
- 1 March 2022 at 00:05 #18986
  claudacate
  Participant
  Thank you for replying. I think WifiManager set the DNS, but I am not sure. I will read up on the link you provided. Here is the serial output:
  
  wm:[1] AutoConnect: SUCCESS
  *wm:[1] STA IP Address: 192.168.88.217
  Connection data is correct！
  192.168.88.217
  HTTP server started
  ONLY ONE RECIPIENTmiltiple destination and attachments
  Insecure client:0
  smtp.gmail.com
  465
  Sending status:
  0
  2
  Could not connect to mail server
- 1 March 2022 at 04:54 #18987
  claudacate
  Participant
  I read your link. I did not use your version of the Wi-Fimanager library. I think that is the problem. Do I just swap the whole library? Or should I change a file? Thanks
- 1 March 2022 at 07:47 #18989
  Renzo Mischianti
  Keymaster
  Hi Claudcate,
  wait, first try to send an email with standard WiFi management.
  Give me a feedback.
  Bye Renzo
- 1 March 2022 at 14:46 #19049
  claudacate
  Participant
  I used the standard WiFi management and EMailSenderEsp8266GMailTest.ino and still I can’t get a connection. Here is the serial monitor output. Hopefully you can make sense of it. Thank you
  
  Connecting to Tea King
  …………….
  Connection: ESTABLISHED
  Got IP address: 192.168.88.217
  ONLY ONE RECIPIENTmiltiple destination and attachments
  Insecure client:0
  smtp.gmail.com
  465
  Sending status:
  0
  2
  Could not connect to mail server
- 2 March 2022 at 11:12 #19054
  Renzo Mischianti
  Keymaster
  Hi, claudcate,
  try to do a telnet to
  smtp.gmail.com 465
  so you can check if you have a firewall that blocks your outgoing connection.
  
  Bye Renzo
- 2 March 2022 at 16:32 #19065
  claudacate
  Participant
  Hi, I have tried the following. 1. I have used my iPhone’s hotspot as a wifi source since my home network may have possible network problem such as firewall. Result: same error as before. 2. I have spoofed my email address to see if I get different error code. Result: same error as before. 3. telnet to smtp.gmail.com 25 result: telnet smtp.gmail.com 25
  Trying 142.251.8.108…
  Connected to smtp.gmail.com.
  Escape character is ‘^]’.
  220 smtp.gmail.com ESMTP z11-20020a17090a1fcb00b001bc58804974sm5738172pjz.27 – gsmtp
  
  4. telnet to smtp.gmail.com 465. Result: telnet smtp.gmail.com 465
  Trying 142.251.8.108…
  Connected to smtp.gmail.com.
  Escape character is ‘^]’.
  Connection closed by foreign host.
- 2 March 2022 at 16:40 #19066
  claudacate
  Participant
  However, upon further research. It seems port 465 requires SSL to connect. I used openssl and below is result. I think I am missing SSL in the code
  openssl s_client -connect smtp.gmail.com:465
  CONNECTED(00000005)
  depth=3 C = BE, O = GlobalSign nv-sa, OU = Root CA, CN = GlobalSign Root CA
  verify return:1
  depth=2 C = US, O = Google Trust Services LLC, CN = GTS Root R1
  verify return:1
  depth=1 C = US, O = Google Trust Services LLC, CN = GTS CA 1C3
  verify return:1
  depth=0 CN = smtp.gmail.com
  verify return:1
  
  Here is the EMailSenderEsp8266GMailTest.ino I used
```
#include "Arduino.h"
#include <EMailSender.h>
#include <ESP8266WiFi.h>

const char *ssid = "hotspot";
const char *password = "12345678";

uint8_t connection_state = 0;
uint16_t reconnect_interval = 10000;

EMailSender emailSend("sendemailfrom@gmail.com", "passworddfdf");

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);

	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";

	EMailSender::Response resp = emailSend.send("hcubeh@yahoo.com", message);

	Serial.println("Sending status: ");

	Serial.println(resp.status);
	Serial.println(resp.code);
	Serial.println(resp.desc);
}

void loop() {

}
```
- 3 March 2022 at 13:35 #19072
  claudacate
  Participant
  I found my mistake! When I read the tutorial I followed the instruction for esp8266 core 2.4.2 and changed the emailsenderkey.h. I feel silly. Sorry I took up so much your time Renzo. Thanks again for your help.
- 3 March 2022 at 14:51 #19073
  claudacate
  Participant
  I know this is not part of your library, but was wondering if you can help. I recorded my email and password in EEProm, but when the value are used to login I can’t login. However, if I placed the value like char email_login[32]= “claudacate@gmail.com” I’d have no problem. I serial print out the value they looked identical. Here is what I used to update my email and password. Thank you
```
		char email_login[32];
		char email_password[32];

		void loademail() {
			EEPROM.get(0, email_to);
			EEPROM.get(0 + sizeof(email_to), email_login);
			EEPROM.get(0 + sizeof(email_to) + sizeof(email_login),
					email_password);
			char ok[3];
			EEPROM.get(
					0 + sizeof(email_to) + sizeof(email_login)
							+ sizeof(email_password), ok);
			if (String(ok) != String(“OK”)) {
				email_to[0] = 0;
				email_login[0] = 0;
				email_password[0] = 0;
			}
		}

		void saveemail() {
			EEPROM.put(0, email_to);
			EEPROM.put(0 + sizeof(email_to), email_login);
			EEPROM.put(0 + sizeof(email_to) + sizeof(email_login),
					email_password);
			char ok[3] = “OK”;
			EEPROM.put(
					0 + sizeof(email_to) + sizeof(email_login)
							+ sizeof(email_password), ok);
			EEPROM.commit();

		}
```
  - 3 March 2022 at 15:38 #19076
    Renzo Mischianti
    Keymaster
    Hi Claudecate,
    probably there are spaces added to the end of string to grow all byte array length
    
    Try something similar to
    
    int writeStringToEEPROM(int addrOffset, const String &strToWrite) { byte len = strToWrite.length(); EEPROM.write(addrOffset, len); for (int i = 0; i < len; i++) { EEPROM.write(addrOffset + 1 + i, strToWrite[i]); } return addrOffset + 1 + len; } int readStringFromEEPROM(int addrOffset, String *strToRead) { int newStrLen = EEPROM.read(addrOffset); char data[newStrLen + 1]; for (int i = 0; i < newStrLen; i++) { data[i] = EEPROM.read(addrOffset + 1 + i); } data[newStrLen] = '\0'; *strToRead = String(data); return addrOffset + 1 + newStrLen; }
    
    where the addrOffset is the start of eeprom and you can use String variable
    
    String user = "ciccio"; String password = "passwd"; writeStringToEEPROM(0, user); writeStringToEEPROM(32, password);
    
    and to read
    
    String user; String password; readStringFromEEPROM(0, &user); readStringFromEEPROM(32, &password);
    
    Bye Renzo
- 3 March 2022 at 15:12 #19074
  Renzo Mischianti
  Keymaster
  Hi Claudacate,
  I do a lot of tests (with core 2.7 and 3.0), but no problem with WeMos D1.
  
  Do you have to change some settings on EMailSenderKey?
  
  Bye Renzo
  - 3 March 2022 at 15:17 #19075
    Renzo Mischianti
    Keymaster
    Ahhh ok..
    Too late
- 3 March 2022 at 16:16 #19077
  claudacate
  Participant
  Thank you for your help. I really appreciate it.
  
  However,when I change the variable from char to String, I’d get error message
  
  testemail:14:50: error: no matching function for call to ‘EMailSender::EMailSender(String&, String&)’
  14 | EMailSender emailSend(email_login, email_password);
- 3 March 2022 at 16:36 #19082
  Renzo Mischianti
  Keymaster
  Try
```
EMailSender emailSend(email_login.c_str(), email_password.c_str());
```
  Bye Renzo
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