Turn on/off antenna power

‘poff’ none

Binary Frame: poff: 02 01 04 70 6F 66 66 1A 03 pon: 02 01 03 70 6F 6E 73 03

‘P’ none

⇒ This command turns OFF or ON the antenna power. This reduces power consumption of the module. ‘pon’ A “power on” is done automatically by the reader if necessary (before TAG access

commands like ‘s’/’m’). After executing the Power On command the reader is operational instantly. ‘poff’ Pleas keep in mind that turning off the antenna power will reset all TAG’s in the field and therefore a new “select”, and “login” is required before card access. It is not

recommended to use this option while the host is processing data from the card (f.e. between the read and decrement instruction). Sequential usage

Neither does a ‘poff’ instruction does affect the reader if the field is already turned off nor does the ‘pon’ if the antenna field is turned on. Power Down PIN By using the Power Down Pin (PIN 16 of the OEM module), the reader enters the Hard Power Down mode which will require less power consumption. In difference to the ‘poff’ instruction this mode is only left when the PIN is released and set to GND level again.

Leaving the Hard Power Down mode will require as much time as a reader reset (approx. 68ms).


pon activates the field
poff turns off the field

 Read/Write User Port

‘pr’ ‘pw’ None data (1 Byte)

Binary Frame: Port Read: 02 01 02 70 72 01 03 Port Write: 02 01 03 70 77 01 04 03

user port state (1 Byte)

⇒ This command returns the state of the user port (PIN 14 of the OEM module). This port may be used as 1 bit I/O port.

Read port

Even a 8 bit value is returned at reading only the LSB of the answer does indicate the port state.

Write port

As the user port is only 1 bit wide the port pin is cleared if data is zero or set if data is unequal zero.


pr reads the user port
pw00 clears the user port
pw01 sets the user port

 Get ID

‘g’ none

Binary Frame: 02 FF 01 67 99 03

none Station ID (1 byte)

⇒ This command is used to get the Station ID’s for all reader modules on the bus.

Time slotted answer To avoid bus collisions, the answer of each reader is transmitted in a different timeslot. The Station ID of each device denotes the timeslot (see table below). In binary mode the Station ID is packed into a correct data frame (STX 0 1 ID BCC ETX), in ASCII

mode data is terminated by CR+LF. The length of a timeslot depends on the selected baud rate.

This command supports 256 different timeslots. After the last timeslot (256*T0) this command is done and all available readers should have transmitted their serial number. Mifare 1K Printed Card,Mifare Classic 1k Card ,Mifare 1K RFID Cards

It is not supported to use different baud rates on the same bus.

RFID Mifare 1K S50 Printing Cards,RFID Mifare 1K Cards,Mifare 1K Proximity Contactless Cards. Mifare 1K Cards,Mifare Full Color Offset Printing Cards ,Mifare 1k PVC White Cards,Mifare 1k PVC White Card with Magtripe,Mifare 1k Clamshell White Cards,Pre-printed Mifare 1k cards,Pre-printed Mifare 1k Clamshell cards.

For a example of use refer to page 43 (personalization of MIFARE reader)

ASCII mode

If the reader is used in ASCII protocol mode the personalization procedure is not necessary. In ASCII mode the station ID does not affect readers functionality (even if set to an reserved value like 0 or FFh).