N: AUX2 Values - FujiNetWIFI/fujinet-firmware GitHub Wiki

Bit Description
0 Translate CR to EOL
1 Translate LF to EOL
2 NOT USED
3 NOT USED
4 NOT USED
5 NOT USED
6 NOT USED
7 NOT USED

if both bits 0 and 1 are set, then CR/LF pair is translated to a single EOL.