ESP8266 Community Forum

hello guys, i am very confused with this error
Arduino: 1.8.5 (Windows 7), Board: "WeMos D1 R1, 80 MHz, 4M (1M SPIFFS), v2 Lower Memory, Serial, None, Only Sketch, 921600"

Build options changed, rebuilding all
Archiving built core (caching) in: C:\Users\NFFA\AppData\Local\Temp\arduino_cache_139250\core\core_esp8266_esp8266_d1_CpuFrequency_80,FlashSize_4M1M,LwIPVariant_v2mss536,Debug_Serial,DebugLevel_None____,FlashErase_none,UploadSpeed_921600_383c791da14f3e5a4e51a4af678dd5fb.a
Sketch uses 330776 bytes (31%) of program storage space. Maximum is 1044464 bytes.
Global variables use 36092 bytes (44%) of dynamic memory, leaving 45828 bytes for local variables. Maximum is 81920 bytes.
error: failed reading byte
warning: espcomm_send_command: can't receive slip payload data
error: failed reading byte
warning: espcomm_send_command: can't receive slip payload data
error: failed reading byte
warning: espcomm_send_command: can't receive slip payload data
error: failed reading byte
warning: espcomm_send_command: can't receive slip payload data
error: failed reading byte
warning: espcomm_send_command: can't receive slip payload data
error: failed reading byte
warning: espcomm_send_command: can't receive slip payload data
error: failed reading byte
warning: espcomm_send_command: can't receive slip payload data
error: failed reading byte
warning: espcomm_send_command: can't receive slip payload data
error: failed reading byte
warning: espcomm_send_command: can't receive slip payload data
warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_upload_mem failed
error: espcomm_upload_mem failed

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

anyone can helo me? please