Capacitive Touch
The product uses a ten-point capacitive touch screen.
ATTENTION:
Capacitive touch screens are very sensitive to power noise.
Ripple voltage/current from the power adapter can cause the
LCD ripples, as well as the capacitive touch malfunction. If
you use the APK Multi-Touch under Android to test it, you can
find the touchpoint float. There are several ways to solve
this problem:
1) Use a high-quality power adapter. Or a battery to provide
power like a cell phone or tablet PC.
2) If the power adapter isn’t good enough, make sure the
power input connector Pin 3 is connected to the Ground. This
method can eliminate the problem totally. You can test it by
touching the GND with one hand, while the other hand operates
on the capacitive touch screen. In this case, the user’s body
acts as the Power System Ground.
DB9 Connector
There are six serial ports available with DB9 connector, all
configured in RS232 mode by default (COM1 to COM6). You can
set COM3 to COM6 in RS485 mode. If you need a different
configuration, please contact us.
