Previously I can use Nano clone slave to upload extracted programs from AVRDUDESS (I’ve tried version 2.6, 2.14, 2.17) or to burn bootloader, but recently, the Nano clone slave I use seem to have problem accepting inputs from Arduino as ISP (I’ve tried both Uno clone and another Nano clone as master…

You have AVRdudess set to flash a 328P, but the device you have is actually a 328PB. The two have different signatures. You might try changing the processor setting to 328PB in AVRdudess. Are you trying to flash a bootloader or a program? Edit: i recently received a Pro Mini that was supposed t…

This thread might help for context: [image] How to configure Arduino R3 ATMEGA328PB 3rd Party Boards The 328PB is backwards-compatible enough with the 328P that you can substitute a (cheaper) 328PB and run 328P firmware on it without any problems. The PB has …

I’m trying to both extract and upload program with AVRDUDESS. Guess yeah I’d try using 328PB, though I’m rather afraid to put the Nano slave in bricked state if something went wrong, as I’m trying and struggling to burn bootloader of the bricked Nano (which I asked too in this post, means it has 328…

Well if Detect in AVRdudess says it's a 328P, I don't understand where the signature discrepancy is coming from. What does the marking on the chip say? Edit: I realize now that I don't understand what you've done or what is going wrong. I would just say that if you are using AVRdudess, you have …

This is what the chip says: [image] Guess to sum up what I tihnk is going wrong, my recent Nano clones I got can’t seem to work when using them as slave in Arduino-as-ISP (SPI programming) connection. whenever using it with AVRDUDESS or with Arduino IDE.

[image] 89jvek: AVR device initialized and ready to accept instructions Device signature = 1E 95 16 (ATmega328PB) Error: expected signature for ATmega328P is 1E 95 0F - double check chip or use -F to carry on regardless The above section of your first post is what I don't understand. From …

[image] ShermanP: The above section of your first post is what I don't understand. From your picture, the chip is a 328P, not a 328PB. Was the Nano that produced that error marked as 328P? If you’re asking about the Detect version in AVRDUDESS, yes, the Nano that produced that error was marke…

Then it seems you have a counterfeit chip that's marked as 328P but is really 328PB. I say counterfeit because I don't think Microchip would do that. In any case, if the chip detects as a 328PB, then you will have to treat it as a 328PB when using AVRdudess. But it should still be possible to fla…

It didn’t work either when using 328PB in AVRDUDESS, the response is this: avrdude.exe: AVR device initialized and ready to accept instructions Reading | ################################################## | 100% 0.00s avrdude.exe: Device signature = 0x1e950f (probably m328p) avrdude.exe: Expected…

I understand about 328P and 328PB being different, though I still wonder if I can use AVRDUDESS on 328P (tried with both 328P and 328PB as I said in the above comment), as I may not know how to differentiate 328P and 328PB (e.g. the label saying it’s 328P as I posted above) when buying Nanos later.

Problems with Nano slave (clone) when using Arduino as ISP

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camsysca February 7, 2026, 10:42am 3

This thread might help for context:

Reminds me, too, that I have several of these on a shelf, patiently waiting for a dual-serial application to get off the ground. Hmm. Monday’s rabbit hole is calling!

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Problems with Nano slave (clone) when using Arduino as ISP

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