No further updates possible after Beta R.2.00x

[it9hre]

Hi Manuel/Guido,
after firmware update (tag: R2.00x) I'm no more able to perform other firmware updates.
Each time I got error like this one:
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avrdude.exe: AVR device initialized and ready to accept instructions

Reading |
avrdude.exe: arduino_read_sig_bytes(): (a) protocol error, expect=0x10, resp=0x30
avrdude.exe: error reading signature data for part "ATmega328P", rc=-3
avrdude.exe: error reading signature data, rc=-3
avrdude.exe: stk500_disable(): protocol error, expect=0x14, resp=0x30

avrdude.exe done. Thank you.
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NOTEs
1) The firmware is installed and working.
2) I did some test also with 38400 baud instead of 115200 baud speed, but nothing changed.

Can you help me?
Thanks,
Salvo
IT9HRE

[dl6sez]

Hello OM,

the bootloader is working, do you see your serial?
If not, install bootloader again with ISP and than again firmware....

73 de Chris

[it9hre]

Hi Chris,
thank for your reply!
Just to clarify the issue: I already was able to load latest beta firmware R.2.00x into my (tr)USDX, and it works pretty well.
My problem is that, from that moment on, I'm not able to load any other firmware, neither the latest itself again!
I always got the "protocol error" that I posted before.

So to answer your question: no, I'm not able to see the serial number becouse the radio powers on regulary without showing it on the display.
However I have the serial saved for future use.

Regards,
Salvo

[Constrainted]

No problem going back and forth between firmware 2.00x and 2.00i and 2.00x again for me.

Good luck with the issue.

73 Constrainted

[it9hre]

Hi everyone,
problem seems SOLVED.
I flashed again the "initial bootloader" through ISP, then I could install the firmwares.
Thank you for tips and support.
Regards,
'73 de IT9HRE
Salvo