Hi, hope your all keeping well, have a rather puzzling issue, i have 3 compatible Nano boards, 1 Loads perfectly using the new bootloader, the other 2 need to use the old bootloader and sketch loads perfectly. but the sketch only runs on the 1 that uses the new bootloader, it runs differently on the other 2 and certain things don't perform or respond in the way they should. should there be differences in the way the boards are wired? is there difference between a v3 and earlier board? granted these are not actual Arduino but compatibles, but i am confused and cant seem to find any logic behind the issue, any one have any advice or thoughts please?
cheers
I updated 10 or so "old bootloader" Nanos to the standard bootloader without any issues. Instructions are here:
Try one, I haven't heard of anyone I've recommended this to having any problem doing the reburn.
C
Many thanks, will give it a go, I'm not sure its the bootloader that's at issue though as it does complete the load of the sketch but the sketch just doesn't run as it should on the 2 older bootloader devices., do you know if there is a physical wiring / design difference between the v3 and previous nano types? cheers
No. Sorry.
Can you be more specific?
How does the problem manifest itself?
I'm actually surprised that there are clones with the new bootloader; not saying that it's not possible.
Can you please post clear photos of both sides of each board; we should be able to read the print on the 328P and on the chip (TTL-to-USB converter) on the other side.
You might have boards with fake or reject chips and the photos might give an indication.
I've purchased 15 so far, a lot of 5 with the new bootloader (April, 2021 purchase) and 10 that had the old bootloader. Got frustrated with having both (because at least 3 failed when I used the wrong bootloader), so I reloaded them all; turned out none had failed, just gotten "confused", because when I applied the new bootloader, all were resuscitated. Go figure.
C
However, none manifested quirks, they either worked or didn't. All my quirks so far have been self-inflicted.
C
Well, since they're "clones", it's hard to say whether they are different from one another. Few clones provide schematics, and there ARE quite a wide variety of circuits (especially WRT the USB/Serial chips, from "exact" clones with FTDI (perhaps fake) chips, to a bunch with CH340G chips, to some newer models with CH340E or other USB/Serial chips.)
(Some more recent "Nano" boards have been shipping with a non-Atmel main CPU chip - an LGT8f328p instead of an atmega328p. And it has substantial differences. Also, there have been reports of chips labeled as ATmega328p but not meeting published specs - suspected "counterfeit" chips. (the only difference that was noticed with those was WRT power-consumption in sleep mode. But who knows if there are other differences.))
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.