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On 2017-10-18 Wed, at 06:32, Valent Turkovic <val...@otvorenamreza.org> wrote:

> So if wifi is active, in sta mode but not associated to AP then serial
> communication is having issues and is loosing characters when
> receiving them.

Regardless of this poor behavior, I think you're going to regret it eventually 
if you don't have some kind of checksum and retransmit logic--implying you're 
also doing framing. Async serial lines can be tricky, and have non-zero bit 
error rates. And the framing mechanism needs to be resilient against incomplete 
packets (meaning, bytes dropped between transmitter and receiver). 

Newline-separated ASCII records with a hex CRC are not the worst idea, but you 
need to deal with the situation where a newline gets lost, or you get trash or 
fewer bytes than you needed. I've used YMODEM before for bulk data.

Note that the Arduino Yún uses packets.

Jay

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