Arduino: Wemos D1 error while uploading sketch

[ghost]

Arduino: 1.6.12 (Windows 10), Плата:"WeMos D1 R2 & mini, 80 MHz, 115200, 4M (3M SPIFFS)"

Скетч использует 226 729 байт (21%) памяти устройства. Всего доступно 1 044 464 байт.
Глобальные переменные используют 31 936 байт (38%) динамической памяти, оставляя 49 984 байт для локальных переменных. Максимум: 81 920 байт.
C:\Users\admin\AppData\Local\Arduino15packages\esp8266\tools\esptool\0.4.9/esptool.exe -vv -cd nodemcu -cb 115200 -cp COM3 -ca 0x00000 -cf C:\Users\admin\AppData\Local\Temp\arduino_build_771914/WiFiScan.ino.bin
esptool v0.4.9 - (c) 2014 Ch. Klippel [email protected]
setting board to nodemcu
setting baudrate from 115200 to 115200
setting port from COM1 to COM3
setting address from 0x00000000 to 0x00000000
espcomm_upload_file
espcomm_upload_mem
setting serial port timeouts to 1000 ms
opening bootloader
resetting board
trying to connect
flush start
setting serial port timeouts to 1 ms
Произошла ошибка при загрузке скетча
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
resetting board
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
resetting board
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_upload_mem failed

[WereCatf]

It looks like it's unable to reset your board to programming-mode. Do you have something connected to GPIO0, GPIO2 and/or GPIO15?

[ghost]

It looks like it's unable to reset your board to programming-mode. Do you have something connected to GPIO0, GPIO2 and/or GPIO15?

Good day. No. Only usb connected.
2 blue diods flash + esp8266 blink twice when uploading sketch.

[WereCatf]

Well, then I don't know. Something is preventing it from going into programming-mode, but I can't say what. You could pull GPIO0 to GND manually and resetting the board, that should at least allow you to flash a sketch on it.

[ghost]

You could pull GPIO0 to GND manually and resetting the board

Wemos D1 has no GPIO0

ESP8266 may be?

[WereCatf]

Yes, it does have GPIO0. GPIO0 is connected to D3, see https://www.wemos.cc/product/d1.html

[ghost]

Yes, it does have GPIO0. GPIO0 is connected to D3, see https://www.wemos.cc/product/d1.html

I must pull D3 to GND? OK. I will check. Thank you.

[ghost]

Not helped :(

warning: espcomm_send_command: didn't receive command response
warning: espcomm_send_command(FLASH_DOWNLOAD_BEGIN) failed
closing bootloader
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
error: espcomm_upload_mem failed

[ghost]

IT'S WORKS!!! :) But I didn't now what I do :)
I pull of GPIO0 and GND - and it uploaded!
@WereCatf, many thanks to You!

[JollySwagman]

It worked for me too!

[jabrena]

Hi, I am a new user with Wemos D1 R2 on OSX Sierra:

I could install the drivers for Sierra but after some tests with the board, suddenly I could install any Sketch and I always receive the same message:

Uploading 226304 bytes from /var/folders/_v/ygs75xf50wd8ypygstdmh9s00000gn/T/arduino_build_343736/protoShieldLeds.ino.bin to flash at 0x00000000
warning: espcomm_send_command: didn't receive command response
warning: espcomm_send_command(FLASH_DOWNLOAD_BEGIN) failed
error: espcomm_upload_mem failed
error: espcomm_upload_mem failed

I have tried to connect with a wire GPIO0 to GND but the problem continues. Any help?

I am reading this page, but I don´t know how to reset the chip esp8266:
https://github.com/esp8266/Arduino/blob/master/doc/boards.md#wemos-d1

I remember that in the beginning some led in the chip blip but now is disabled only turn on when I reset the board. Any help?

Many thanks in advance.

Cheers

Juan Antonio

[frankchih]

HI,
I have same problem, but not resolve.
I try pull D3 to GND, and not work.
How do I solve?

Thanks.

[segaura]

I solved every issue with the old esp8266 boot configuration:
D3 to GND (GPIO0 logic level 0)
D4 floating (GPIO2 has pullup logic level 1)
D8 to GND (GPIO15 logic level 0)

...and not only the upload issue we are talking here, but even the 'not recognized usb device' my windows tells me with the cheapest chinese wemos D1 mini V1 board

So, for those of you only trying to pull down D3, please try pulling down D8 also.

EDIT: I've found a smarter way to do this. RTS signal correctly pulls down D3 so it is only sufficient to connect D3 and D8 together, they both get pulled down and everything works. Maybe a second pull-down transistor can be inserted in next wemos design if my analisys is correct.

[ratnick]

I'm facing the same problem with Wemos D1 R2.
I'm on Windows 7, have tried different USB ports, and download speeds. Also tried pulldown D3 and D8 without any effect.
Any other ideas? Could have something to do with power supply through USB?
I have had this before, and then it usually worked every one in four tries. But now it's simply stuck.

Sketch uses 254,147 bytes (24%) of program storage space. Maximum is 1,044,464 bytes.
Global variables use 37,608 bytes (45%) of dynamic memory, leaving 44,312 bytes for local variables. Maximum is 81,920 bytes.
Uploading 258288 bytes from C:\Users\nnohrras\AppData\Local\Temp\arduino_build_726740/ArducamOnD1.ino.bin to flash at 0x00000000
warning: espcomm_send_command: didn't receive command response
warning: espcomm_send_command(FLASH_DOWNLOAD_BEGIN) failed
error: espcomm_upload_mem failed
error: espcomm_upload_mem failed

[vikibaarathi]

I had the same problem. I took the following 2 steps:

• I connected D3 to GND and D8 to GND with simple jumper cables.
• I took out every single USB device connected to my machine. (Keyboard, Mouse, Monitor extension)

[AmiraliSetayeshi]

I had the same problem and I try to recovery the solder of WiFi header on WeMos D1 board.
It works!

[yogamuliawan]

what is pulldown mean ?

[ghost]

what is pulldown mean ?
Connect one to another :)

[yogamuliawan]

by jump wires ?

[ghost]

Yep.
GPIO0 on GND

[yogamuliawan]

sorry sir, im new on arduino
what is GPIO0 , is that a pin or what ? i know GND

[yogamuliawan]

im using Wemos D1R2

[pieman64]

@yogamuliawan WeMos' use ESP8266's and the pins are referenced GPIO 0, 2, 4, 5 etc. WeMos use D1, D2 as they think it makes it easier for you but IMHO they should stick with the Espressif GPIO numbers.

Go to the WeMos site and dig out the look up table for the D1R2 that maps D references to GPIO references. GPIO 0 should be D3. See mini "map" at https://wiki.wemos.cc/products:d1:d1_mini

For some reason WeMos are forever removing useful stuff from their site, like the "maps" for products they have just stopped supplying etc.

[jimsy3]

lol, this is so ridiculous....
how, when and for how long are you supposed to ground the D3(gpio0) pin?
1) when the board is completely off
2) when the board is connected to a power source (and ground for 1-2 seconds? both D pins???)
3) before and during the uploading of a sketch
4) do you also need to ground the D8 pin then?
5) or it gives the best results when you bridge D3 and D8 while the board is running? or offline ?
6) ground D3 and D8 at the same time or after the 1st one has been grounded for 1-2 seconds?
7) do you need to reboot or reset the board after some of that has been done?

8) do i need to use a special USB data cable to upload stuff or can i use a regular USB charging cable too?
9) what is the special USB data cable even called?
10) does the port upload speed have to be 115200 or 921600 or 9600???
.....

[jimsy3]

lol... not to mention that my problem was probably just a too long cable... (2+2 or 1+2meters)

[MariaDab]

I have same error and I have connect D3 to GND and D8 to GND, but the error still there.

[devyte]

To all having this problem. not all boards have the same D numbering. The relevant pins to make sure of are GPIO0, GPIO2 and/or GPIO15, but you'll need to figure out which D numbers they correspond to on your board. Keep in mind that some boards are clones, i.e.: they can have pcb mistakes, have bad flash, etc.
OP's issue is resolved, and I personally can't reproduce on a Wemos D1 mini r2. In addition, to those having the comm open failed error, it is documented.
Closing per #3655 .

[sancs001]

Had same problem...
Solved: Goto control panel, device manager, ports COM and LPT,
Find USB-SERIAL CH340(COM6) ...or what ever your com port is... and double click on it
select port settings
change bits per second from 9600 to 155200 and click ok
Go back to arduino ide sketch and set in tools the upload speed to 155200 accordingly
upload sketch again...
Done
(no connection from d3 or d8 needed...)

[slakbal]

@sancs001 you rock!

[deki1225]

Same issue, I tried all of the above; ran into the same problem with one board; will not load anything.

Even tried to reload NodeMCU. Other boards work fine. Suspect board is toasted

[creinero]

(This is a solution for future reference)
I had a similar issue with a Wemos D1 mini from Banggood.
I've tried everything recommended, D3/D8 to GND, pressing reset button, etc. Tried from Mac, tried form Linux.

My board had a particularity: what should be the CH340G chip had no markings on it, so I started to suspect this was the problem. Whenever I tried to upload I saw the board led flashing, but never an answer on the serial line. (I had no debugging elements)

So I have a second FTDI (real one) board, and I:

• connected the FTDI to the computer usb
• FTDI Rx/Tx to Tx/Rx of the Wemos.
• Connected the Wemos board directly the PC (for power).
• D3(GPIO0) to GND (this stays on for the duration of the upload).
  Then I selected the external FTDI serial device as the Arduino port (115200 bauds) and before pressing upload I would press and release the RESET button on the Wemos board.

With that it works, I can upload any sketches.

I hope this helps someone else.

[kijuku]

Hi,

I had the same problem with my Wemos D1 R2. It resolved by combining D3 and D8 with jumper. I reset and transferred the program. Thanks to @segaura !

[KazW]

This thread helped fix my "bricked" wemos D1 mini. In my case, I was getting the upload error and when I looked at the serial output, all I saw were the random characters during boot up. I left a jumper wire in place from D3 (GPIO0) to ground and was able to upload sketches again. However, the board only booted the sketch once the jumper wire was removed.

Super useful thread, thanks!

[peter3099]

Hi Guys

I spent 2 hours trying to fix this issue, tried everything you suggested, and then I got desperate and start looking at the board, when I flipped it I noticed that GPIO3(D0 Rx) and GPIO1(D1 Tx) where soldered together, I got my solder and I separate them and Woilaaaaaaaaa! Started working right away. It came like that from Aliexpress, check yours in case you have the same defect!

[Ricardosgeral]

nothing of the above solutions solved my problem.

In my case the LED don't turn on. (only turns on if i connect D4 to gnd).

I suspect the Wemos Di mini is burned !!!

[Kamil34138]

Hi,
I have problem with Wemos D1 R1.
I want connect with wifi and mobile app "Blynk" but when i upload program for connect arduino to wifi, I have problem. Some Errors.

warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_open failed

Code:

define BLYNK_PRINT Serial

include

include

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "...";

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "...";
char pass[] = "...";

void setup()
{
// Debug console
Serial.begin(9600);

Blynk.begin(auth, ssid, pass);
}

void loop()
{
Blynk.run();
}

[Kamil34138]

When i conncect GND and D9(GPI02) the LED on wifi module turn on...

[dewy24]

include

include

include

include //This library you can add via Include Library > Manage Library >

include

include // This library is already built in to the Arduino IDE

include //This library you can add via Include Library > Manage Library >

LiquidCrystal_I2C lcd(0x3F, 16, 2);

define DHTPIN D8 //define as DHTPIN the Pin 3 used to connect the Sensor

define DHTTYPE DHT11 //define the sensor used(DHT11)

DHT dht(DHTPIN, DHTTYPE);//create an instance of DHT

const char* host = "iot-web";

const char* ssid = "Dedew";

const char* password = "dewy2488";

ESP8266WebServer server(80);

float humidity, temp_f; // Values read from sensor

String webString="";

unsigned long previousMillis = 0; // will store last temp was read

const long interval = 2000; // interval at which to read sensor

void handle_root() {

server.send(200, "text/plain", "Welcome to weather server, open /temp, /humidity or /api");

delay(100);

}

void setup(void)

{

lcd.init(); // initializing the LCD

lcd.backlight();

Serial.begin(9600);

dht.begin(); // initialize temperature sensor

// Connect to WiFi network

WiFi.begin(ssid, password);

Serial.print("\n\r \n\rWorking to connect");

// Wait for connection

while (WiFi.status() != WL_CONNECTED) {

delay(500);

Serial.print(".");

}

Serial.println("");

Serial.println("DHT Weather Reading Server");

Serial.print("Connected to ");

Serial.println(ssid);

Serial.print("IP address: ");

Serial.println(WiFi.localIP());

MDNS.begin(host);

MDNS.addService("http", "tcp", 80);

Serial.printf("Ready! Open http://%s.local in your browser\n", host);

server.on("/", handle_root);

server.on("/temp", {

gettemperature();       // read sensor

webString="Temperature: "+String((int)temp_f)+" Celsius";

server.send(200, "text/plain", webString);

});

server.on("/humidity", {

gettemperature();           // read sensor

webString="Humidity: "+String((int)humidity)+"%";

server.send(200, "text/plain", webString);

});

//Rest API for sensor data

server.on("/api", {

gettemperature();           // read sensor

String json="{\"temperature\":"+String((int)temp_f)+",\"humidity\":"+String((int)humidity)+"}";

Serial.println(json);

server.send(200, "application/json", json);

});

server.begin();

Serial.println("HTTP server started");

}

void loop(void)

{

server.handleClient();

gettemperature();

lcd.setCursor(0, 0);

String hs="Humidity: "+String((int)humidity)+" % ";

String ts="Temp: "+String((int)temp_f)+" C ";

lcd.setCursor(0, 0);

lcd.print(ts);

lcd.setCursor(0, 1);

lcd.print(hs);

}

void gettemperature() {

unsigned long currentMillis = millis();

if(currentMillis - previousMillis >= interval) {

previousMillis = currentMillis;   

humidity = dht.readHumidity();          // Read humidity (percent)

temp_f = dht.readTemperature(false);     // Read temperature as Celsius

if (isnan(humidity) || isnan(temp_f)) {

  humidity=0;

  temp_f=0;

  Serial.println("Failed to read from DHT sensor!");

  return;

}

}

}

warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_open failed

[earlephilhower]

This is most-times a hardware issue (USB port or cables) or a driver issue. The core repo is not the appropriate place to get help for these kinds of things. Try the forums at https://esp8266.com or https://gitter.im/esp8266/Arduino

[Slayer4477]

warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_open failed
Attention !!!!!!!!!!
this error taken when tx pin connected and i solve this upload problem with OTA

like when uploading procces i switch tx to gpio and then finished upload reverce .. my code setu part:

void setup() {
Serial.begin(9600);
while (!Serial);
USE_SERIAL.begin(9600);
HMISerial.begin(9600);
HMISerial.write(0xff);
HMISerial.write(0xff);
HMISerial.write(0xff);

WiFi.disconnect();
WiFi.mode(WIFI_STA);
);
//WiFiMulti.addAP("xxxx", "xxxx1");

Serial.print("Looking for WiFi ");
String s = "";
WiFi.enableSTA(true);
WiFi.setAutoConnect(true);
WiFi.setAutoReconnect(true);
Serial.println(WiFi.softAPIP());
while (WiFiMulti.run() != WL_CONNECTED) {
s += '.';
// Printer(s);
if (s.length() > 18) {
s = "";
}
delay(1000);
// ESP.restart();
}
String st = WiFi.SSID().c_str();
Serial.println("");
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
Serial.print("MAC: ");
Serial.println(WiFi.macAddress());
Printer(st);
// wifi_set_sleep_type(NONE_SLEEP_T);
webSocket.begin("192.168.111.111", 9300);
//webSocket.begin("192.168.1.250", 6548);

webSocket.setReconnectInterval(1000);
webSocket.onEvent(webSocketEvent);

WiFi.hostname("machine_m\":79"); // DHCP Hostname (useful for finding device for static lease)
ArduinoOTA.setHostname("m\":79");
ArduinoOTA.setPort(8266);
ArduinoOTA.setPassword("asd");
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Attention
ArduinoOTA.onStart( {

/////////////////change pin to gpio////////
//GPIO 1 (TX) swap the pin to a GPIO.
pinMode(1, FUNCTION_3);
//GPIO 3 (RX) swap the pin to a GPIO.
pinMode(3, FUNCTION_3);
///////////////////////
String type;
if (ArduinoOTA.getCommand() == U_FLASH) {
  type = "sketch";
} else { // U_SPIFFS
  type = "filesystem";
}

// NOTE: if updating SPIFFS this would be the place to unmount SPIFFS using SPIFFS.end()
Serial.println("Start updating " + type);

});
ArduinoOTA.onEnd( {
////////////////change pin to rx tx again//////////
//GPIO 1 (TX) swap the pin to a TX.
pinMode(1, FUNCTION_0);
//GPIO 3 (RX) swap the pin to a RX.
pinMode(3, FUNCTION_0);
///////////////////////
Serial.println("\nEnd");
});
ArduinoOTA.begin();
delay(1000);
}

[Slayer4477]

change tx pin to gpio ,,, i solve this problem with ota upload

void setup() {
Serial.begin(9600);
while (!Serial);
WiFi.hostname("xxxxx"); // DHCP Hostname (useful for finding device for static lease)
ArduinoOTA.setHostname("xxxx");
ArduinoOTA.setPort(8266);
ArduinoOTA.setPassword("");
ArduinoOTA.onStart( {

/////////////////change pin to gpio////////
//GPIO 1 (TX) swap the pin to a GPIO.
pinMode(1, FUNCTION_3);
//GPIO 3 (RX) swap the pin to a GPIO.
pinMode(3, FUNCTION_3);
///////////////////////
String type;
if (ArduinoOTA.getCommand() == U_FLASH) {
  type = "sketch";
} else { // U_SPIFFS
  type = "filesystem";
}

// NOTE: if updating SPIFFS this would be the place to unmount SPIFFS using SPIFFS.end()
Serial.println("Start updating " + type);

});
ArduinoOTA.onEnd( {
////////////////change pin to rx tx again//////////
//GPIO 1 (TX) swap the pin to a TX.
pinMode(1, FUNCTION_0);
//GPIO 3 (RX) swap the pin to a RX.
pinMode(3, FUNCTION_0);
///////////////////////
Serial.println("\nEnd");
});
ArduinoOTA.begin();
delay(1000);
}