08H
End of Data packet.
Package
length
LENGTH
2 bytes
Refers to the length of package content (command packets and
data packets) plus the length of Checksum( 2 bytes). Unit is
byte. Max length is 256 bytes. And high byte is transferred first.
Package
contents
DATA
－
It can be commands, data, command
’
s parameters,
acknowledge result, etc. (fingerprint character value, template
are all deemed as data);
Checksum SUM 2
bytes
The arithmetic sum of package identifier, package length and
all package contens. Overflowing bits are omitted. high byte is
transferred first.
Check and acknowledgement of data package
Note: Commands shall only be sent from upper computer to the Module, and the Module
acknowledges the commands.
Upon receipt of commands, Module will report the commands execution status and results to upper
computer through acknowledge packet. Acknowledge packet has parameters and may also have
following data packet. Upper computer can’t ascertain Module’s package receiving status or
command execution results unless through acknowledge packet sent from Module. Acknowledge
packet includes 1 byte confirmation code and maybe also the returned parameter.
Confirmation code’s definition is :
00h: commad execution complete;
01h: error when receiving data package;
02h: no finger on the sensor;
03h: fail to enroll the finger;
06h: fail to generate character file due to the over-disorderly fingerprint image;
07h: fail to generate character file due to lackness of character point or over-smallness of
fingerprint image
08h: finger doesn’t match;
09h: fail to find the matching finger;
0Ah: fail to combine the character files;
0Bh: address
ing PageID
is beyond the finger library;
0Ch: error when reading template from library or the template is invalid;
0Dh: error when uploading template;
0Eh: Module can’t receive the following data packages.
0Fh: error when uploading image;
10h: fail to delete the template;
11h: fail to clear finger library;
13h: wrong password!
15h: fail to generate the image for the lackness of valid primary image;
18h: error when writing flash;
19h: No definition error;
1Ah: invalid register number;
1Bh: incorrect configuration of register;
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Summary of Contents for R303A Series
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