The issues is successfully solved FTDI issue - it was because the shipped FTDI died. As I wrote before - after power on the RX led don't blink shortly but is constantly on. I have bought a new one named FT232 (microusb port) and I can upload sketchs again :) "zzzz" issue - I think my last uploaded sketch crashed for some reason (Li wrote about it early) After uploading TestLed.ino all is fine - my cat is a Cat again, not a Bee :) Tomorrow I will upload WrtieInstincts.ino again for recalibration after the crash.

To avoid a physycaly repluging of all servos you may edit definitions in OpenCat.h I did it when was trying to upload V0_2 - so I have V0_2 settings and V0_1 servo wiring

I have the permition for a dialup group. And I tryed to run IDE as a root - it has any permition because is a super user for Linux. I suspect FTDI doesn't bcs a problem with the board What does the boadr sound mean ? "zz pause zz pause zzzz pause zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz...."

"ROBITON 900mAh protected 14500 3.7V Li-ion ICR" - DONT WORK "Rexant Li-ion 14500 unprotected 750mAh 3.7V ART 30-2050" - WORK

Thank you, but it all seems like not my case I know about the lower power signal "moew - moew - moew" - I had it when start Nybble.ino for the first time. But batteries' output is 8 volts now so it's not the "meow" case. After powering on the sound is "zz pause zz pause zzzz pause zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz...." The reset switch stop the "zzzzz" but after releasing it the sound is strarting again "zz-zz-zzzz-zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz..... May be it is not a Cat but a Bee ? :))) It is look like a problem with the board (or a board booting/starting) or with a uploaded sketch. But I cant't upload a new sketch (LED-test again for example) or burn the new bootloader (see my first post) FTDI: I was trying - check settings "no line feed" and "57000 bauds" - change USB cables - change USB ports - replug FTDI - restart IDE (many times under different conditions) - use IDE as root (superuser for Ubuntu) - test with a miltimetr all "long legs" of the UART port between soldering points of the NyBoard and the UART socket - all is fine - no breaks, no shortcuts