Matrix Orbital Corp

Posted: **Sat Dec 01, 2012 11:33 am**

This should be simple, but I cannot get any response from the keypad with my LK202-25.

I have a B202A-BK, and I connected it to the keypad header. I get no response when I push anything on the keypad. Just to make sure I reset the keypad settings using the following:

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#!/bin/sh
echo -e "\xFE\x58"
echo -e "\xFE\xCA\xF5\xA0\x00"
echo -e "\xFE\x93\x01"
echo -e "\xFE\x41"
echo -e "\xFE\x55\x08"
echo -e "\xFE\x7E\x00"
echo -e "\xFE\xD5ABCDEFGHIJKLMNOPQRSTUVWXYabcdefghijklmnopqrstuvwxy"
echo -e "\xFE\x93\x00"
echo -e "\xFE\xCA\xF5\xA0\x18"

so characters should be sent immediately.

I am centering the keypad connector on the header. I can't find any docs on the BK202 keypad connector.

Posted: **Sat Dec 01, 2012 1:33 pm**

OK, got it figured out.... Make sure canonical mode is not set for the serial port.

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stty -F /dev/ttyS0 -icanon

or

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newtio.c_lflag = 0;

if you're working with *nix.

Posted: **Mon Dec 03, 2012 8:03 am**

Hello cptdondo,

Glad to see you have that keypad working now. For future reference you can find the schematic layout of the 7-key B202A keypad here, and the header pinout in the LK202-25 manual.

All the best with your project, if you do run into any further questions as you continue development, please don't hesitate to ask.
Troy

Matrix Orbital Corp

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