Nálam kicsi másként néz ki az esptool kimenete:
esptool.py v2.0-beta1
Connecting....
Detecting chip type... ESP8266
Uploading stub...
Running stub...
Stub running...
Attaching SPI flash...
Configuring flash size...
Auto-detected Flash size: 1MB
Flash params set to 0x0220
Compressed 588000 bytes to 379359...
Wrote 588000 bytes (379359 compressed) at 0x00000000 in 66.8 seconds (effective 70.4 kbit/s)...
Hash of data verified.
Leaving...
Hard resetting...