• I changed my programming device to cheap clone FT232BL based USB to UART device and succeeded to erase and write a new image. These settings works for me:
    root@raspberry:/home/pi/espurna# stty</dev/ttyUSB0
    speed 38400 baud; line = 0;
    min = 0; time = 0;
    -brkint -icrnl -imaxbel
    -opost -onlcr
    -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke

    I am satisfied! :-)

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