[del]problème téléversement

j'ai un probleme enfin presque j'ai juste a changer de port usb et sa régle et attendre quelque heur et sa remarche
code en 2 partie sa rentre pas

Arduino : 1.8.11 (Windows 10), Carte : "Arduino Mega or Mega 2560, ATmega2560 (Mega 2560)"

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\killian\Documents\Arduino\libraries -fqbn=arduino:avr:mega:cpu=atmega2560 -vid-pid=0X2341_0X0042 -ide-version=10811 -build-path C:\Users\killian\AppData\Local\Temp\arduino_build_559534 -warnings=none -build-cache C:\Users\killian\AppData\Local\Temp\arduino_cache_23946 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino5.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\killian\Desktop\arduino\lcd\lcd.ino
C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\killian\Documents\Arduino\libraries -fqbn=arduino:avr:mega:cpu=atmega2560 -vid-pid=0X2341_0X0042 -ide-version=10811 -build-path C:\Users\killian\AppData\Local\Temp\arduino_build_559534 -warnings=none -build-cache C:\Users\killian\AppData\Local\Temp\arduino_cache_23946 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino5.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\killian\Desktop\arduino\lcd\lcd.ino
Using board 'mega' from platform in folder: C:\Program
Using core 'arduino' from platform in folder: C:\Program
Detecting libraries used...
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO=10811 -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\mega" "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534\\sketch\\lcd.ino.cpp" -o nul
Alternatives for Wire.h: [Wire@1.0]
ResolveLibrary(Wire.h)
  -> candidates: [Wire@1.0]
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO=10811 -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\mega" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534\\sketch\\lcd.ino.cpp" -o nul
Alternatives for RTClib.h: [RTClib@1.3.3]
ResolveLibrary(RTClib.h)
  -> candidates: [RTClib@1.3.3]
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO=10811 -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\mega" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\killian\\Documents\\Arduino\\libraries\\RTClib" "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534\\sketch\\lcd.ino.cpp" -o nul
Alternatives for LiquidCrystal.h: [LiquidCrystal@1.0.7]
ResolveLibrary(LiquidCrystal.h)
  -> candidates: [LiquidCrystal@1.0.7]
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO=10811 -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\mega" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\killian\\Documents\\Arduino\\libraries\\RTClib" "-IC:\\Program Files (x86)\\Arduino\\libraries\\LiquidCrystal\\src" "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534\\sketch\\lcd.ino.cpp" -o nul
Using cached library dependencies for file: C:\Program
Using cached library dependencies for file: C:\Program
Using cached library dependencies for file: C:\Users\killian\Documents\Arduino\libraries\RTClib\RTClib.cpp
Using cached library dependencies for file: C:\Program
Generating function prototypes...
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO=10811 -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\mega" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\killian\\Documents\\Arduino\\libraries\\RTClib" "-IC:\\Program Files (x86)\\Arduino\\libraries\\LiquidCrystal\\src" "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534\\sketch\\lcd.ino.cpp" -o "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534\\preproc\\ctags_target_for_gcc_minus_e.cpp"
"C:\\Program Files (x86)\\Arduino\\tools-builder\\ctags\\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534\\preproc\\ctags_target_for_gcc_minus_e.cpp"
Compilation du croquis...
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -MMD -flto -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO=10811 -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\mega" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\killian\\Documents\\Arduino\\libraries\\RTClib" "-IC:\\Program Files (x86)\\Arduino\\libraries\\LiquidCrystal\\src" "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534\\sketch\\lcd.ino.cpp" -o "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534\\sketch\\lcd.ino.cpp.o"
Compiling libraries...
Compiling library "Wire"
Utilisation du fichier déjà compilé : C:\Users\killian\AppData\Local\Temp\arduino_build_559534\libraries\Wire\Wire.cpp.o
Utilisation du fichier déjà compilé : C:\Users\killian\AppData\Local\Temp\arduino_build_559534\libraries\Wire\utility\twi.c.o
Compiling library "RTClib"
Utilisation du fichier déjà compilé : C:\Users\killian\AppData\Local\Temp\arduino_build_559534\libraries\RTClib\RTClib.cpp.o
Compiling library "LiquidCrystal"
Utilisation du fichier déjà compilé : C:\Users\killian\AppData\Local\Temp\arduino_build_559534\libraries\LiquidCrystal\LiquidCrystal.cpp.o
Compiling core...
Using precompiled core: C:\Users\killian\AppData\Local\Temp\arduino_cache_23946\core\core_arduino_avr_mega_cpu_atmega2560_0c812875ac70eb4a9b385d8fb077f54c.a
Linking everything together...
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-gcc" -w -Os -g -flto -fuse-linker-plugin -Wl,--gc-sections,--relax -mmcu=atmega2560 -o "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534/lcd.ino.elf" "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534\\sketch\\lcd.ino.cpp.o" "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534\\libraries\\Wire\\Wire.cpp.o" "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534\\libraries\\Wire\\utility\\twi.c.o" "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534\\libraries\\RTClib\\RTClib.cpp.o" "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534\\libraries\\LiquidCrystal\\LiquidCrystal.cpp.o" "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534/..\\arduino_cache_23946\\core\\core_arduino_avr_mega_cpu_atmega2560_0c812875ac70eb4a9b385d8fb077f54c.a" "-LC:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534" -lm
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-objcopy" -O ihex -j .eeprom --set-section-flags=.eeprom=alloc,load --no-change-warnings --change-section-lma .eeprom=0 "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534/lcd.ino.elf" "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534/lcd.ino.eep"
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-objcopy" -O ihex -R .eeprom "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534/lcd.ino.elf" "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534/lcd.ino.hex"
Utilisation de la bibliothèque Wire version 1.0 dans le dossier: C:\Program Files
Utilisation de la bibliothèque RTClib version 1.3.3 dans le dossier: C:\Users\killian\Documents\Arduino\libraries\RTClib 
Utilisation de la bibliothèque LiquidCrystal version 1.0.7 dans le dossier: C:\Program Files
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-size" -A "C:\\Users\\killian\\AppData\\Local\\Temp\\arduino_build_559534/lcd.ino.elf"
Le croquis utilise 7294 octets (2%) de l'espace de stockage de programmes. Le maximum est de 253952 octets.
Les variables globales utilisent 459 octets (5%) de mémoire dynamique, ce qui laisse 7733 octets pour les variables locales. Le maximum est de 8192 octets.
C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude -CC:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf -v -patmega2560 -cwiring -PCOM8 -b115200 -D -Uflash:w:C:\Users\killian\AppData\Local\Temp\arduino_build_559534/lcd.ino.hex:i 

avrdude: Version 6.3-20190619
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
         Copyright (c) 2007-2014 Joerg Wunsch

         System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf"

         Using Port                    : COM8
         Using Programmer              : wiring
         Overriding Baud Rate          : 115200
avrdude: ser_open(): can't set com-state for "\\.\COM8"
avrdude: ser_drain(): read error: Descripteur non valide


avrdude: ser_send(): write error: sorry no info avail
avrdude: stk500_send(): failed to send command to serial port
avrdude: ser_recv(): read error: Descripteur non valide


avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: ser_send(): write error: sorry no info avail
avrdude: stk500_send(): failed to send command to serial port
avrdude: ser_recv(): read error: Descripteur non valide


avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: ser_send(): write error: sorry no info avail
avrdude: stk500_send(): failed to send command to serial port
avrdude: ser_recv(): read error: Descripteur non valide


avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: ser_send(): write error: sorry no info avail
avrdude: stk500_send(): failed to send command to serial port
avrdude: ser_recv(): read error: Descripteur non valide


avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: ser_send(): write error: sorry no info avail
avrdude: stk500_send(): failed to send command to serial port
avrdude: ser_recv(): read error: Descripteur non valide


avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: ser_send(): write error: sorry no info avail
avrdude: stk500_send(): failed to send command to serial port
avrdude: ser_recv(): read error: Descripteur non valide


avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_getsync(): timeout communicating with programmer

avrdude done.  Thank you.

le port série sélectionné 
 n'existe pas ou votre Arduino n'est pas connectée

enfin cest pas un problème de téléversement mes de détection sa peux venir de quoi

Lis ça, il y a certainement une réponse