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ESP8266 does not work after firmware upgrade

Styczeń 7th, 2015 . by vip

If you experience problems with communicating (sending AT commands) over serial ESP8266 after upgrade, e.g.
– no output,
– ERROR in communication,
– no input (invalid baudrate), it is just problem with CR LF and not selecting 9600 baud rate,
here is possible solution…


If you are using picocom, use –omap, it will do the job:
picocom /dev/ttyUSB0 -b 9600 --omap crcrlf

Also, if you prefer screen,

screen /dev/ttyUSB0 9600
and hit „enter” key after every command, then press ctrl+j

Strange, old firmware works, even nodemcu.
You don’t have to blame esptool.py…




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