# Arduino-Mega-Towitek-Transponder How to communicate with TWT 2021 and Arduino Mega und Micro Arduino Micro is in keyboard-mode. Passwordsafe is Arduino. No Server needed. Wiring Transponder: red -> + (5 or 3.3V) | blue -> GND | yellow -> RX ## password2-switch... Transponder Code shown in serial Monitor. Input Pin2 :PW can be switched PW-length=15 bytes PW-store EEPROM Addr 0 Password is changeable within first 20 seconds after powersupply connected via Arduino serial Monitor or bash: echo "secretPW123" > /dev/ttyACM0 Blogpost: https://untergang.de/index.php/linux-blog/passwortmanager-mit-arduino-2.html