Several methods:
-
v2 has the model number correctly printed on the bottom of the router itself. The text says "N600 wireless ... WNDR3700v2".
-
v1 has 8 MB flash RAM, while v2 and 3800 have 16 MB.
-
v1 and v2 have 64 MB RAM, while 3800 has 128 MB
-
3800 has red front panel
This is from 3700v2:
root@router2:~# dmesg | grep m25
[ 3.036552] m25p80 spi0.0: found mx25l12805d, expected m25p80
[ 3.042785] m25p80 spi0.0: mx25l12805d (16384 Kbytes)
root@router2:~# dmesg | grep Memory
[ 0.000000] Memory: 59896K/65536K available (3174K kernel code, 169K rwdata, 796K rodata, 268K init, 213K bss, 5640K reserved, 0K cma-reserved)
16 MB flash and 64 MB RAM --> 3700v2