Ever changing serial number

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DL1DBY
 

Posts: 14
Joined: 01 Jan 2022, 11:53

Ever changing serial number

Post by DL1DBY »

On two of my (tr)uSDX I have flashed the bootloader via ISP but I cannot flash the firmware vis USB. Before trying all the solutions recommended in this forum I have one question that I didn`t find already answered.

My (tr)uSDX show the following behaviour: Every time I power them up a different serial number is displayed. Is this normal or should there be a fixed serial number after flashing the bootloader?

Thanks and best regards
Dieter DL1DBY
AC9YY
 

Posts: 133
Joined: 21 Mar 2022, 00:04
Location: Illinois, USA

Re: Ever changing serial number

Post by AC9YY »

I had a serial number that kept changing and it was the result of a bad bootloader installation. I ended up having to use a USBasp programmer to get the firmware loaded correctly.
DL1DBY
 

Posts: 14
Joined: 01 Jan 2022, 11:53

Re: Ever changing serial number

Post by DL1DBY »

Thanks for the information. I'll try to reflash the bootloader.
DL2MAN
 

Posts: 706
Joined: 30 Dec 2021, 19:18
Contact:

Re: Ever changing serial number

Post by DL2MAN »

Ever changing Serial Numbers are a sign of wrong fuses.
Make sure, while burning bootloader, to have the Fuses set to the correct Values.
Check Screenshots on Bootloader Page for Details.

73 Manuel, DL2MAN
DL1DBY
 

Posts: 14
Joined: 01 Jan 2022, 11:53

Re: Ever changing serial number

Post by DL1DBY »

Thanks, reflashing the bootloader (with special attention to the fuse settings) solved the issue.

Though I cannot say by now whether I used wrong fuse settings in the first attempt, the chances for this are high.

Best regards
Dieter DL1DBY
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