Hans

It's not possible using Arduino IDE, but I think it's possible to specify the bootloader file when using PlatformIO. But it is trivial to just run Avrdude manually. If you...

I suggest you paste the entire error message Avrdude gives you.

``` AVR device initialized and ready to accept instructions Device signature = 00 00 00 (retrying) Device signature = 00 00 00 (retrying) Device signature = 00 00 00 ```...

> When searching for information or videos on using MiniCore, you see that when you choose a chip (for example, MiniCore->ATMega-328) in the Arduino IDE's programmer selection menu, the available...

> I am wondering whether it would be possible to make things even smoother. Avrdude can now send a pulse over the DTR line, right? Well, yes. But this depends...

Regarding the Arduino as ISP. If you use Avrdude 8.0, you may be able to use `-c arduino -b 19200` to communicate with the Arduino as ISP programmer. It will...

> Permitting to flash optiboot again in MiniCore It is difficult to know exactly what kind of bootloader is present. Why not dump the entire flash, save it as a...

I've never used this interface, but it's using avr-gcc underneath, where the user has access to the compiler flags. So if you know how to set up XMEM in, say,...

With PlatformIO it should be able to do: ```ini ; Platformio.ini build_flags = -Wl,--defsym=__heap_start=0x808000,--defsym=__heap_end=0x80FFFF ``` If that's not working, it looks like you can use an [extra_script](https://docs.platformio.org/en/latest/scripting/examples/extra_linker_flags.html).

Hi @tobozo! > maybe try lower freq? I tried all the way down to 1 MHz, and worked my way all the way up to 14 MHz. Below 5.6 MHz...