Discussion in "ARM Development" started by    sachinmm    Sep 14, 2015.
Mon Sep 14 2015, 05:20 AM
hello sir,i have a sm20 finger print module and i want to write an application for interfacing sm20 module with lpc2148 but plz tell me how to check my sm20 finger print module is working or not??? i have serial port terminal software..
Tue Sep 15 2015, 12:52 AM
I found this data sheet that seems to cover your model.
As commands are 24 bytes long and not in ASCII you can't do a simple test.
Write a program to send a command string and check the reply.

 sachinmm like this.
Tue Sep 15 2015, 06:26 AM
thanku sir my module is working
Tue Sep 15 2015, 06:27 AM
but there is one issue i used lpc2148 trainer board for interfacing fp..in that pin.0.8 showing 0 voltage and i cant get proper response from fp
Tue Sep 15 2015, 06:31 AM
pin 0.8 and pin 0.9 are used for receive and transmit data for UART1....and i used UART0 for transmitting data and uart1 used for showing response from fp....
Sun Sep 20 2015, 09:12 PM

but there is one issue i used lpc2148 trainer board for interfacing fp..in that pin.0.8 showing 0 voltage and i cant get proper response from fp


Are you still having problems ?
Mon Sep 21 2015, 04:37 AM
yes sir..
Mon Sep 21 2015, 04:39 AM
because FP data is reading by using UART1 and TX AND RX pin of uart1 is connected to pin0.8 & pin0.9 and TX show 0 volt.
Wed Sep 23 2015, 01:04 AM
Can you give a link to the lpc2148 trainer board you are using.

Are you able to program the board to do anything ?
Do you have any demo software that transmits on UART1 ?

Tue Sep 29 2015, 09:31 PM
[Topic moved to ARM Development Forum]

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