esptool.py v2.7
Serial port /dev/ttyUSB0
Connecting....
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
MAC: 5c:cf:7f:33:b0:8a
Uploading stub...
Running stub...
Stub running...
Configuring flash size...
Warning: Could not auto-detect Flash size (FlashID=0xa2a2a2, SizeID=0xa2), defaulting to 4MB
Compressed 397632 bytes to 274021...
Wrote 397632 bytes (274021 compressed) at 0x00000000 in 24.2 seconds (effective 131.3 kbit/s)...
File md5: 3c3f55423b44b9d92532798830b06af9
Flash md5: b4c02b4020afd7c1f31b1bc334880175
MD5 of 0xFF is 94e411b99e4b5949c67e8b1a18caa7c9
A fatal error occurred: MD5 of file does not match data in flash!