toleary

Does the Omega support external devices that connect using RS232?

Blog Post created by toleary on Aug 7, 2013

The SmartPAD contains an internal serial port, which can be used to attach a serial card reader. This port is accessed by removing the back of the SmartPAD.

Note: If the customer removes the back of the SmartPAD, it voids the Pharos warranty to the customer. However, Pharos staff are allowed to take the SmartPAD back off to connect a card reader.

The port is a 9-pin RS-232 serial male connector that supports card readers configured to 9600 baud, 8, n, 1 that send an ID string terminated by a non printable char like CR. The DTR pin on the socket can supply 5 Volts at 500 mA to the card reader. The pin-outs for the port are as follows:

Pin Name

1 NC
2 Rx
3 Tx
4 DTR
5 GND
6 NC
7 RTS
8 CTS
9 NC

NC = not connected

SmartPAD software does not support the RTS and CTS signals. No control signals are sent or acknowledged by the DTR pin (pin 4).

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