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3.4.5
WD – write page
The memory of the transponder is organised in blocks, containing 32 bits. The data’s of every single
block must be changed separately.
•
Start the reader with the command WD plus parameters ( plus <CR>). The sent parameter consists
of the block address and writing data’s (8 ASCII characters).
•
Wait for the answer
•
Analyse the received answer: 3 characters plus <CR>.
ACK
<
CR
>
Writing process was successful
NAK
<
CR
>
Writing process was not successful.
NOT
<
CR
>
The response of the transponder was not readable.
The result of the writing process may also seen at the LED’s.
•
LED L2 lit, if there was a successful write
•
LED L3 lit, if there was no successful write.
Example
:
WD
<SP>
20
<SP> <
0 1 2 7 A C D F
> <CR>
write to block 20
Allowed values (block numbers of the transponder IC):
ALGO 9 (1 kBit; P4150, P4450, P4550)
3 ... 33
ALGO 6 (2 kBit; Hitag 1)
16 ... 63
ALGO 14 (2, 4; kBitEM4305, EM4569)
5 … 15
