Empty attachment

[Norbert]

Hi,

Esp8266 Wemos D1 Mini, emailsender is working fine except attachment. It can attach the file with correct name/extension but  if I want to open it it is always empty. No content.

80-90bytes in size on arrival but when I want to open a txt file attached it is empty. I tried to change mime type or encode 64 true/false but no change.

 

[Renzo Mischianti]

Hi Norbert,

If the file It’s 80byte mean the there are almost 80 characters. It’s very strange, try to change extension, like xml or similar.

Please give me a feedback.

Bye Renzo

[Michael]

Hey there,

i have the same exact problem….

Your Lib works very nice! But the attachments of the recieved e-mail are empty.

I also use the WEMOS D1Mini Pro Board with an SD Card (also tried Spiffs, but also blank attachments)

@Mischianti: Did your attachments work? (i’m asking because you mentioned in your article, that you’ve tested it on an Wemos D1 Mini)

I also tried using .xml .csv .pdf file extension with and without enabled encoding 64.

Have you any clue what could be the reason for these empty attachments? :/

 

Thanks a lot!

Greetings from Germany

[Renzo Mischianti]

Hi Michael,

I tested now my WeMos D1 mini, and the txt attachment works correctly.

But It’s strange because if the file It’s 80byte mean that there are 80 character, so It isn’t empty.

Can you send me your code PLZ.

Bye Renzo

 

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[Michael]

Thanks for your quick response!

I took the example code, provided in your library and changed minor things….:

/*
 * EMailSender library for Arduino, esp8266 and esp32
 * esp8266 Gmail send example with 2 attach loaded in SPIFFS
 *
 * The base64 encoding of the image is slow, so be patient
 *
 * http://mischianti.org/category/my-libraries/emailsender-send-email-with-attachments/
 *
 */

#include "Arduino.h"

#include 
#include 

// Libraries for SD card
#include "FS.h"
#include "SD.h"


uint8_t connection_state = 0;
uint16_t reconnect_interval = 10000;

EMailSender emailSend("XXXXXXXXXXXXXXXXXXXXX", "XXXXXXXXXXXXXXXXXXXXX");

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);
				const char *ssid = "XXXXXXXXXXXXXXXXXXXXX";
				const char *password = "XXXXXXXXXXXXXXXXXXXXX";

				if (!SD.begin(15)) {
					Serial.println("An Error has occurred while mounting SD");
					return;
				}
				Serial.println("SD OK");

				/*Serial.println("ReadDir");
				 Dir dir = SPIFFS.openDir("/");
				 while (dir.next()) {
				 Serial.print(dir.fileName());
				 if(dir.fileSize()) {
				 File f = dir.openFile("r");
				 Serial.println(f.size());
				 }
				 }
				 */

				connection_state = WiFiConnect(ssid, password);
				if (!connection_state) // if not connected to WIFI
					Awaits(); // constantly trying to connect
				Serial.println("CONNECTED");
				EMailSender::EMailMessage message;
				message.subject = "XXXXXXXXXXXXXXXXXXXXX";
				message.message = "XXXXXXXXXXXXXXXXXXXXX";
				Serial.println("Point0");
				EMailSender::FileDescriptior fileDescriptor[4];

				fileDescriptor[0].filename = F("test.txt");
				fileDescriptor[0].url = F("/test.txt");
				fileDescriptor[1].mime = "text/plain";
				fileDescriptor[0].storageType =
						EMailSender::EMAIL_STORAGE_TYPE_SD;

				Serial.println("Point1");

				fileDescriptor[1].filename = F("test.pdf");
				fileDescriptor[1].url = F("/test.pdf");
				fileDescriptor[1].mime = "application/pdf";
				fileDescriptor[1].encode64 = true;
				fileDescriptor[1].storageType =
						EMailSender::EMAIL_STORAGE_TYPE_SD;

				fileDescriptor[2].filename = F("test.xml");
				fileDescriptor[2].url = F("/test.xml");
				fileDescriptor[2].mime = "application/xml";
				fileDescriptor[2].encode64 = true;
				fileDescriptor[2].storageType =
						EMailSender::EMAIL_STORAGE_TYPE_SD;

				fileDescriptor[3].filename = F("test.csv");
				fileDescriptor[3].url = F("/test.csv");
				fileDescriptor[3].mime = "text/csv";
				fileDescriptor[3].encode64 = true;
				fileDescriptor[3].storageType =
						EMailSender::EMAIL_STORAGE_TYPE_SD;

				EMailSender::Attachments attachs = { 4, fileDescriptor };
				Serial.println("Point2");
				EMailSender::Response resp = emailSend.send(
						"XXXXXXXXXXXXXXXXXXXXX", message, attachs);
				Serial.println("Point3");
				Serial.println("Sending status: ");

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

			}

			void loop() {

			}

 

• This reply was modified 1 year, 10 months ago by Renzo Mischianti.

[Renzo Mischianti]

Hi Michael,
there is an error on index of txt file, so the mime type is not set

				fileDescriptor[0].filename = F("test.txt");
				fileDescriptor[0].url = F("/test.txt");
				fileDescriptor[1].mime = "text/plain";
				fileDescriptor[0].storageType =
						EMailSender::EMAIL_STORAGE_TYPE_SD;

I rewrite the sketch and put some example, I test It with SPIFFS and work correctly

I attach the sketch with all sampe file.

Bye Renzo

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[Norbert]

I use spiffs by the way.

Outlook displays 80byte for the attachment, after saving to a folder it is 0 bytes in a file explorer.

[Renzo Mischianti]

Try to send the attach via classic email from gmail or similar.

I think the problem is outlook.

 

[Norbert]

You got it. I checked it on the web surface of gmail and the attachments have arrived correctly but not with outlook.

Do you have any idea what is the problem with outlook?

 

[Renzo Mischianti]

I check on the web and seems there are a lot of problems with Outlook,

can you try to send the txt file directly from gmail and check in outlook?

 

Bye Renzo

[MH]

Hello together, i think i solved the Problem 🙂

Now all four tested file extensions work! (xml,pdf,txt,csv) there was an issue in your library:

in EMailSender.cpp Line 386:

Original: client.println();

New: client.println("\n");

Thanks for your help and great work!

I’m very happy, that it works now!

I put a Screenshot and the .cpp file below (had to rename it to .txt)

 

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[Norbert]

Yes it is working now.

Thank you for your help!

[Renzo Mischianti]

Thanks to all,

I’m going to release a new library version with this fix and new distribution list features.

Thanks again Renzo

[Author]

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