Liaison série TTL - Chicoreehttp://www.chicoree.fr/w/Liaison_s%C3%A9rie_TTLRS232 Shifter SMDhttp://www.sparkfun.com/products/449FTDI Cable VCC-3.3V I/Ohttp://www.sparkfun.com/products/9717FTDI Cable VCC-5V I/Ohttp://www.sparkfun.com/products/9718