# Error when Uploading **URL:** \ **Category:** Uploading\ **Created:** [February 6, 2025, 2:00pm UTC](https://forum.arduino.cc/t/error-when-uploading/1351103 "2025-02-06T14:00:20Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![dung124](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/dung124/32/1194251_2.png) [@dung124](https://forum.arduino.cc/u/dung124)\ **Post date:** [February 6, 2025, 2:00pm UTC](https://forum.arduino.cc/t/error-when-uploading/1351103/1 "2025-02-06T14:00:21Z")
Sketch uses 358564 bytes (11%) of program storage space. Maximum is 3145728 bytes. Global variables use 39780 bytes (12%) of dynamic memory, leaving 287900 bytes for local variables. Maximum is 327680 bytes. "C:\Users\Windy\AppData\Local\Arduino15\packages\arduino\tools\dfu-util\0.11.0-arduino5/dfu-util" --device 0x2341:0x0070 -D "C:\Users\Windy\AppData\Local\arduino\sketches\3625A93DACD7873814F058BE5425459D/sketch\_feb6a.ino.bin" -Q No DFU capable USB device available dfu-util 0.11-arduino4 Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc. Copyright 2010-2021 Tormod Volden and Stefan Schmidt This program is Free Software and has ABSOLUTELY NO WARRANTY Please report bugs to [http://sourceforge.net/p/dfu-util/tickets/](http://sourceforge.net/p/dfu-util/tickets/) Failed uploading: uploading error: exit status 74 Board: Arduino ESP32 CH340 30P Arduino: 2.3.4 (Windows 8.1) ---
**Author:** ![ptillisch](https://avatars.discourse-cdn.com/v4/letter/p/ad7895/32.png) [@ptillisch](https://forum.arduino.cc/u/ptillisch)\ **Post date:** [February 6, 2025, 2:25pm UTC](https://forum.arduino.cc/t/error-when-uploading/1351103/2 "2025-02-06T14:25:19Z")
Hi @dung124. From the output you shared, I can tell that you have Arduino IDE configured for use with the official [**Arduino Nano ESP32**](https://docs.arduino.cc/hardware/nano-esp32). However, you describe your board as: > [@dung124](#): > > Board: Arduino ESP32 CH340 30P The official **Nano ESP32** board does not have a CH340 USB chip, so this tells me that you have some board other than the **Nano ESP32**. It is expected that the upload will fail when you have Arduino IDE configured for use with the **Nano ESP32** , but are instead using a different board. The solution will be to select the appropriate board from Arduino IDE's **Tools \> Board** menu. If you would like advice about which board to select from that menu, the forum helpers would need to know more about the board you are using. If you provide a link to the product page from which you purchased the board in a reply here, we should be able to glean the necessary information from it. ---
**Author:** ![sterretje](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/sterretje/32/391294_2.png) [@sterretje](https://forum.arduino.cc/u/sterretje)\ **Post date:** [February 6, 2025, 2:27pm UTC](https://forum.arduino.cc/t/error-when-uploading/1351103/3 "2025-02-06T14:27:05Z")
> [@dung124](#): > > Board: Arduino ESP32 CH340 30P To my knowledge the CH340 gives a serial port, not a DFU capable device. Please provide a link to the board that you have and the tell us which exact board you're compiling for. // Edit ptillisch did beat me to it. ---
**Author:** ![dung124](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/dung124/32/1194251_2.png) [@dung124](https://forum.arduino.cc/u/dung124)\ **Post date:** [February 7, 2025, 12:54am UTC](https://forum.arduino.cc/t/error-when-uploading/1351103/4 "2025-02-07T00:54:27Z")
[ESP32 Dev Board CH340 - USB-C - Micro Robotics](https://www.robotics.org.za/ESP32-DEV-CH340-C) this is the link that have informations of my board(i think) i cant find any web site that have suffix 30P also this is the site that i buy it: [https://shopee.vn/Kit-ESP32-CH340-30P-Wifi-Bluetooth-cổng-Type-C-Kit-ESP32-CP2102-30P-Wifi-cổng-Micro-i.1033330712.24102681490](https://shopee.vn/Kit-ESP32-CH340-30P-Wifi-Bluetooth-c%E1%BB%95ng-Type-C-Kit-ESP32-CP2102-30P-Wifi-c%E1%BB%95ng-Micro-i.1033330712.24102681490)) ---
**Author:** ![sterretje](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/sterretje/32/391294_2.png) [@sterretje](https://forum.arduino.cc/u/sterretje)\ **Post date:** [February 7, 2025, 3:41am UTC](https://forum.arduino.cc/t/error-when-uploading/1351103/5 "2025-02-07T03:41:45Z")
> [@dung124](#): > > this is the link that have informations of my board(i think) No, that board uses a different serial-to-usb adapter. You need to install two things (if not done already) 1. The ESP32 board package. The additional board URL under resources → installing ESP32 in Arduino IDE in the Micro Robotics link is possibly not up-to-date. Use [https://espressif.github.io/arduino-esp32/package\_esp32\_index.json](https://espressif.github.io/arduino-esp32/package_esp32_index.json) 2. You need to install the CH340 drivers (based on the name of the product that you bought). > [@dung124](#): > > also this is the site that i buy it: That site asks me to login. ---
**Author:** ![dung124](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/dung124/32/1194251_2.png) [@dung124](https://forum.arduino.cc/u/dung124)\ **Post date:** [February 7, 2025, 1:18pm UTC](https://forum.arduino.cc/t/error-when-uploading/1351103/6 "2025-02-07T13:18:25Z")
Oh thank you, i upload it successfully but it still have a error: Sketch uses 301300 bytes (22%) of program storage space. Maximum is 1310720 bytes. Global variables use 20160 bytes (6%) of dynamic memory, leaving 307520 bytes for local variables. Maximum is 327680 bytes. "C:\Users\Windy\AppData\Local\Arduino15\packages\esp32\tools\esptool\_py\4.9.dev3/esptool.exe" --chip esp32 --port "COM3" --baud 921600 --before default\_reset --after hard\_reset write\_flash -z --flash\_mode keep --flash\_freq keep --flash\_size keep 0x1000 "C:\Users\Windy\AppData\Local\arduino\sketches\3625A93DACD7873814F058BE5425459D/sketch\_feb6a.ino.bootloader.bin" 0x8000 "C:\Users\Windy\AppData\Local\arduino\sketches\3625A93DACD7873814F058BE5425459D/sketch\_feb6a.ino.partitions.bin" 0xe000 "C:\Users\Windy\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.1.1/tools/partitions/boot\_app0.bin" 0x10000 "C:\Users\Windy\AppData\Local\arduino\sketches\3625A93DACD7873814F058BE5425459D/sketch\_feb6a.ino.bin" esptool.py v4.8.1 Serial port COM3 Connecting...................................... A fatal error occurred: Failed to connect to ESP32: No serial data received. For troubleshooting steps visit: [Troubleshooting - ESP32 - — esptool.py latest documentation](https://docs.espressif.com/projects/esptool/en/latest/troubleshooting.html) Failed uploading: uploading error: exit status 2 ---
**Author:** ![sterretje](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/sterretje/32/391294_2.png) [@sterretje](https://forum.arduino.cc/u/sterretje)\ **Post date:** [February 7, 2025, 2:04pm UTC](https://forum.arduino.cc/t/error-when-uploading/1351103/7 "2025-02-07T14:04:05Z")
> [@dung124](#): > > i upload it successfully but it still have a error: > ... > ... > A fatal error occurred: Failed to connect to ESP32: No serial data received. You did not upload successfully because you have an error. I can't help you with that because I don't know anything about ESP32 based boards. ---
**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\ **Post date:** [August 6, 2025, 2:04pm UTC](https://forum.arduino.cc/t/error-when-uploading/1351103/8 "2025-08-06T14:04:18Z")
Closed on August 6, 2025, 2:04pm UTC This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.