RFID 13.56MHz 125KHz Dual Frequency Read/Write Module UART Support ISO14443A T5577

7941W is a multi-protocol dual-band read and write module.set IC and ID read and write one. It can read a variety of 1C and ID card.

Voltage: DC 5V Current: 50mA

Distance: MF1>3cm; EM>5cm Size: 47mmX26mmX5mm

Interface: UART

Support Chips: ISO/IEC 14443 A/MF, NTAG, S20,  S70,  S50 F1108 EM4100(Read only), T5577 read and write.

Temperature: -25~85°C

Connection Introduction:

5V: DC 5V power supply pin; if you use linearity power, it will gain better effects

RX: receive pin

TX: transmit pin

GND: power supply ground pin

IO: definition

Sending Protocol:

Protocol Header: send (OxAB OxBA)
Return: (OxCD OxDC)
Address: default 0x00 Command:
Send:
1). 0x1 Oread UID number

2). 0x11 write UID number (4 bytes), use default password ffffffffffff

3). 0x12 read specified sector

4). 0x13 write specified sector

5). 0x14 modify the password of group A or group B

6). 0x15 read ID number

7). 0x16 write T5577 number

8). 0x17 read all sector data (M 1K card)

Return:
1).0x81 return operation succeeded

2).0x80 return operation failed

Data Length: means following data length; if it's 0, then the following data will not occur
Data: read and written data Sending Data:
1).Read Specified Sector: the first byte of the data represents sector; the second byte means the certain block of the sector; the third byte means A or B group password (OxOA/OxOB); then it comes with password of 6 bytes

2).Write Specified Sector: the first byte of the data represents sector; the second byte means the certain block of the sector; the third byte means A or B group password (OxOA/OxOB); then it comes with password of 6 bytes and block data of 16 bytes

3).Modify Password: the first byte means the certain sector; the second byte means A or B group password (OxOA/OxOB); then it comes with old password of 6 byte and new password

Receiving Data:
Read specified sector return data format, the first byte is sector; the second byte is the certain block of sector; then it comes with block data of 16 bytes

XOR check: result of other bytes check except protocol header
 

Eample:
AB BA 00 10 0010

AB BA0011 04 6DE9 5C17DA

AB BA 00 12 09 00 01 0A FF FF FF FF FF FF 10

AB BA 00 13 19 00 01 0A FF FF FF FF FF FF 00 01 02 03 04 05 06 07 08 09 01 02 03 04 05 06 07

AB BA 00 14 0E 00 0A FF FF FF FF FF FF 01 02 03 04 05 06 17

AB BA 00 15 0015

AB BA 00 16 05 2E 00 B6 A3 02 2A

AB BA 17 07 OA FF FF FF FF FF FF 1A

Package List:

1* R/W Module