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Topic: Which boards do auto-reset when opening "Serial monitor" and which not? (Read 426 times) previous topic - next topic

q2dg

I know UNO does and Leonardo didn't, but I don't know what is the behaviour of the others (by "others" I mean only the boards that nowadays appears in https://www.arduino.cc/en/Main/Products).

Thanks a lot!!

Qdeathstar

if you put a capacitor between ground and reset, you can prevent this behavior on all Arduino boards.

the mega, however, does reset without the capacitor
A creaking creeping shadow
stiff against the freezing fog
glares at a tickless watch.

Time has failed him -- all things shall pass.

DrAzzy

Anything that doesn't have usb on the chip does that - it's needed to program the chip (unless you want to have to hit reset while uploading - but you get a very narrow window for that, nobody likes doing it). But as noted above, it's easy to disable with a cap from reset to ground. 10uf is commonly used, but the exact value isn't critical.
ATtiny core for 841+1634+828 and x313/x4/x5/x61/x7/x8 series Board Manager:
http://drazzy.com/package_drazzy.com_index.json
ATtiny breakouts (some assembled), mosfets and awesome prototyping board in my store http://tindie.com/stores/DrAzzy

Paul__B

The proper way to do it is to break the "Reset-En" link and solder the pins to it for an easily removable jumper - or a miniature pushbutton.

DrAzzy

The proper way to do it is to break the "Reset-En" link and solder the pins to it for an easily removable jumper - or a miniature pushbutton.

Would have been nice if they'd put holes to put pin header in there!
ATtiny core for 841+1634+828 and x313/x4/x5/x61/x7/x8 series Board Manager:
http://drazzy.com/package_drazzy.com_index.json
ATtiny breakouts (some assembled), mosfets and awesome prototyping board in my store http://tindie.com/stores/DrAzzy

Paul__B

Would have been nice if they'd put holes to put pin header in there!
That does seem to be a blindingly obvious approach, doesn't it?

q2dg


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