ESP 8266 error: Could not connect to mail server

[Morne]

Hi Renzo.
As per earlier comments.

I ended up setting up a different gmail account and switched on the non-secure log-in function within gmail.
I changed the code to: EMailSender emailSend(“xxxxxx@gmail.com”, “password”); and I’m 100% sure the credentials are correct.

I still however get:
Connecting to [WiFiEsp] Connected to MS_DK_FB [2Ghz]
MS_DK_FB [2Ghz]

Connection: ESTABLISHED
Got IP address: 192.168.101.181
Sending status:
0
2
Could not connect to mail server

Perhaps I should mention that I’m using the Arduino Mega connected to the ESP8266 over serial.
I also send data to a remote server via the ESP8266 and all that functions well.
Any assistance would be appreciated.

 

Code follows:

#include "WiFiEsp.h"
#include <EMailSender.h>

char ssid[] = "MY SSID"; // your network SSID (name)
char pass[] = "MY PASSWORD"; // your network password
int keyIndex = 0; // your network key Index number (needed only for WEP)
WiFiEspClient client;
#define ESP_BAUDRATE 9600

#include <Wire.h>
int sendmyemailnow_tmr;

uint8_t connection_state = 0;
uint16_t reconnect_interval = 10000;
EMailSender emailSend("myemail@gmail.com", "myemailpassword");
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(9600);
	Serial3.begin(9600); //baud rate for ESP8266 and Serial Monitor
	while (!Serial) {
		; // wait for serial port to connect. Needed for Leonardo native USB port only
	}

	Serial.print("Searching for ESP8266...");
	WiFi.init(&Serial3);

	if (WiFi.status() == WL_NO_SHIELD) {
		Serial.println("WiFi shield not present");
		while (true)
			;
	}
	Serial.println("found it!");
	Serial3.println("AT");
	Serial.println("AT");
	delay(5000);
	if (Serial3.find("OK")) {
		Serial.println("OK");
		delay(1000);
	}
}

void loop() {
	delay(1000);
	Serial.println(sendmyemailnow_tmr);
	sendmyemailnow_tmr++;
	if ((sendmyemailnow_tmr) > 20) {
		sendmyemailnow_tmr = 0;
		sendmyemailnow();
	}
}

void sendmyemailnow() {
	connection_state = WiFiConnect(ssid, pass);
	if (!connection_state) // if not connected to WIFI
		Awaits(); // constantly trying to connect

	EMailSender::EMailMessage message;
	message.subject = "Test Email1";
	message.message = "Ciao come stai<br>io bene.<br>www.mischianti.org";
	EMailSender::Response resp = emailSend.send("mornestander1971@gmail.com",
			message);
	Serial.println("Sending status: ");
	Serial.println(resp.status);
	Serial.println(resp.code);
	Serial.println(resp.desc);
//EMAIL STUFF
}

• This topic was modified 1 year, 5 months ago by Renzo Mischianti.

[Renzo Mischianti]

Hi Morne,
First, try the example to send the email that you can find to the examples folder and give me the test response.
It seems correct, so there may be a network problem, but we’ll have the response with the standard test.
Bye Renzo

[Morne]

Hi Renzo

I have tried your suggestion running it from the sample (EMailSenderEsp8266GMailTest.ino).
Although, I have disabled the ESP8266WiFi.h library as per below code example as I am not running my code on the ESP itself, but rather on an Arduino Mega2560 and talking to the ESP8266 over serial.
If I try to enable the ESP8266WiFi.h library it complains as I’ve obviously not selected the ESP via board manager.
I’m not sure of this makes sense.

If I run it as suggested code, nothing happens and no output to the serial port at all.

#include “Arduino.h”
#include <EMailSender.h>
//#include <ESP8266WiFi.h>
#include “WiFiEsp.h”

[Renzo Mischianti]

Hi Morne,
you need a USB to serial adapter to program an esp01.

ESP-01 modules programming board

Try a telnet from your PC to check if there are some firewall rules versus the smtp server. So we can exclude network problem.

Bye Renzo

[Author]

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