Problem:
I was doing some tests with an RS232 interface SPT3-885-33-1NN0N-0C and sent the 5.4.6. Set Operation Mode [53 11] command with bit 0 set to 1, so the reader is in Plug&Play mode.
Now, I can not communicate with the Reader at 38400 bauds, when it is powered on, the LED is stuck in amber and won't respond to any command. How can I restore the previous settings and go back to the non-Plug&Play mode?
Answer:
There is a hardware difference between our RS232-PCSC interface reader(SPT3-86x series) and our standard RS232 interface reader(SPT3-88x series) even though they both work in the RS232 serial communication interface. The RS232-PCSC interface reader has an 8-pin Molex connector on its PCA which takes an 8-pin serial interface cable. When it powers up, the Plug-and-Play Device ID String must be sent to the host PC at 1200, 7, 1, M through the 8th pin before it can communicate with the host in its default 38400 baud rate again.
An RS232 interface reader is not supposed to be set to the PCSC mode as it doesn't have that 8th pin in its hardware. The RS232 interface reader comes with a 7-pin Molex connector on its PCA with a 7-pin serial interface cable. When it is set to the PCSC mode, the LED will stuck in the amber indicating the reader is trying to send the Plug-and-Play string to the host.
To get the RS232 interface reader out of the PCSC mode, please follow the instructions below:
- Disconnect the power to the reader
- Disconnect the cable from the reader
- Solder a wire to short the pins as the picture shows here.
- Reconnect the cable and power up the reader
- Make sure the green LED will light up
- Send the 30 11 01 01 via Demo and make sure you get a success feedback with "90 00" in the response
- Now the device should be out of the PCSC mode. Test it in or Demo to confirm the unit is back to work
- Power down the reader and remove the short cable. And remember not to set it to PCSC again
