A fatal esptool.py error occurred: Failed to connect to ESP8266: Timed out waiting for packet header

I have this error :

. Variables and constants in RAM (global, static), used 28008 / 80192 bytes (34%)
║   SEGMENT  BYTES    DESCRIPTION
╠══ DATA     1496     initialized variables
╠══ RODATA   920      constants       
╚══ BSS      25592    zeroed variables
. Instruction RAM (IRAM_ATTR, ICACHE_RAM_ATTR), used 59143 / 65536 bytes (90%)
║   SEGMENT  BYTES    DESCRIPTION
╠══ ICACHE   32768    reserved space for flash instruction cache
╚══ IRAM     26375    code in IRAM    
. Code in flash (default, ICACHE_FLASH_ATTR), used 231620 / 1048576 bytes (22%)
║   SEGMENT  BYTES    DESCRIPTION
╚══ IROM     231620   code in flash   
esptool.py v3.0
Serial port COM7
Connecting........_____....._____....._____....._____....._____....._____....._____
A fatal esptool.py error occurred: Failed to connect to ESP8266: Timed out waiting for packet header

I am on the NodeMCU V0.9 (ESP-12 Module)
COM7 is the correct port
I have the CP210x USB driver and the CH340 USB driver installed (at least I think. I've installed each of them maybe 5 times at that point...)
When it is "connecting", the board light flashes differently as usual, so I suppose this means the connection is "recognized"
What could be the problem ?

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.