Bpi-R3 : Store a number serial

Banana Pi Router design BPI-R3/R3 Mini(MT7986)
1

Hy :slight_smile:

For my Project, i need to store a serial number into my R3.

With my prévious Board ( Mochabin), i had this command line to read the serial number :

hexdump -C /dev/mtd1ro | head | grep "MCB" | cut -d"=" -f2 | cut -d'|' -f1

I know that in the R3, there is no serial number.

but i can see mdt0ro, mtd1ro,mtd2ro and mtd3ro :

# ls /dev | grep 'mtd'
mtd0
mtd0ro
mtd1
mtd1ro
mtd2
mtd2ro
mtd3
mtd3ro
mtdblock0
mtdblock1
mtdblock2
mtdblock3

# hexdump -C /dev/mtd0ro | head
^C
# hexdump -C /dev/mtd1ro | head
00000000  01 00 64 aa 78 56 34 12  00 00 00 00 00 00 00 00  |..d.xV4.........|
00000010  47 d4 08 6d 4c fe 98 46  9b 95 29 50 cb bd 5a 00  |G..mL..F..)P..Z.|
00000020  88 00 00 00 00 00 00 00  61 90 00 00 00 00 00 00  |........a.......|
00000030  00 00 00 00 00 00 00 00  d6 d0 ee a7 fc ea d5 4b  |...............K|
00000040  97 82 99 34 f2 34 b6 e4  e9 90 00 00 00 00 00 00  |...4.4..........|
00000050  68 cd 08 00 00 00 00 00  00 00 00 00 00 00 00 00  |h...............|
00000060  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000070  51 5e 09 00 00 00 00 00  00 00 00 00 00 00 00 00  |Q^..............|
00000080  00 00 00 00 00 00 00 00  f4 03 00 aa f5 03 01 aa  |................|
00000090  f6 03 02 aa f7 03 03 aa  80 ff 03 10 00 c0 1e d5  |................|
# hexdump -C /dev/mtd2ro | head
00000000  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
*
00300000
# hexdump -C /dev/mtd3ro | head
00000000  53 50 49 4e 41 4e 44 21  01 00 00 00 10 00 00 00  |SPINAND!........|
00000010  00 08 00 00 40 00 00 00  40 00 0c 00 00 00 20 30  |....@...@..... 0|
00000020  01 00 00 00 ff 00 00 00  00 00 00 00 00 00 00 00  |................|
00000030  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000040  00 00 00 00 00 00 00 00  00 00 00 00 00 00 9a 5e  |...............^|
00000050  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
*
00000800  4d 4d 4d 01 38 00 00 00  46 49 4c 45 5f 49 4e 46  |MMM.8...FILE_INF|
00000810  4f 00 00 00 01 00 00 00  01 00 02 01 00 0d 20 00  |O............. .|
00000820  70 1a 03 00 70 22 03 00  00 03 00 00 20 00 00 00  |p...p"...... ...|

I was wondering if i can use a space in one of mtd to store a custom serial number?

Thanks by advance for your help and answers :slight_smile: