I was looking for a cheap USB to Serial TTL cable that would have a 3,5mm audio plug on its end. Such a cable can easily be found on Amazon for 23,27€ which is just a road robbery. Having an old audio plug the same cable can be constructed for only 6€ and here is the algorithm:
![[Image]](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgAf412GH4gw-y52Td70VFpRTdiBmQqsGl4AdIRJdtdV_2bmytygQSOzfjx4X8ELp4d4HbdF4eqKgHlqQVDpHOj8Um_aUFKfbVGZ52AsR0hjKrFFHPAsLipPO4pZdG3Exgrxy5wOOzUfeY/s320/usbttl.jpg)