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BaracodaPencil 2 – Communication Protocol v1.3 - 33 -
Data Capture
for Workforce
in Motion
2.4.6.4.
2.4.6.4.2.4.6.4.
2.4.6.4. Special command
Special commandSpecial command
Special command
Example
Example Example
Example 4.1
4.1 4.1
4.1
Sending a special command to Code39 symbology.
Sending a special command to Code39 symbology.Sending a special command to Code39 symbology.
Sending a special command to Code39 symbology.
We now want set a larger frame of Min-Max length for Code39 symbology.
Frame to be sent to the decoder:
‘E’ ‘E’ 3 ‘C’ , 2 , 40
Header
Type
Size
Command
Reading this frame, the decoder understands:
The user wants to send a special command (Type "E") to Code39 symbology (Header "E").
The size must be at least 2 and the first byte of the command field must contain a code (ACSII) that
will tell (indirectly) the number of parameters following.
The command "C" will first read, it means “setting a Min. length and a Max. length”. Then the usual
commands ‘D’ and ‘e’ will be sent to enable Min length and Max. length for Code 39 symbology.
Then the Min length will be set to 2 and the Max. length will be set to 40.