125Khz 13.56mhz ID/IC NFC MF T5577 UID Write Reader Module UART Interface

7941W multi protocol dual frequency read and write module, set IC and ID read and write an integrated, readable variety of IC and ID card number, while supporting the MF1K, blank UID card and other IC card sector read and write, as well as T5577 and other ID cards read and write.

Voltage: DC5V
Current: 50mA
Distance: Mifare > 3cm, EM > 5cm
Size: 47mmX26mmX5mm
Interface: UART (customizable TTL), Wiegand
Support cards: ISO/IEC, 14443, A/MF1, NTAG, MF1xxS20, MF1xxS70, MF1xxS50,
EM4100, T5577 read and write function
Operating temperature: -25 to +85c

The following is the communication protocol of UART
Send protocol:
Protocol header, address  command data length    data          XOR check
AB BA                  1Byte      1Byte       1Byte        1-255Byte    1Byte
Receive protocol:
Protocol header  address command   data length     data       XOR check
CD DC                 1Byte     1Byte        1Byte       1-255Byte      1Byte
Protocol header: send (0xAB 0xBA),
Return (0xCD, 0xDC)
Address: default 0x00
Command:
Send out
1. 0x10 read the UID number
2. 0X11 writes the UID number (4 bytes) default password ffffffffffff
3. 0x12 reads the specified sector
4. 0x13 writes the specified sector
5., 0x14 modifies the A group or the B group password
6. 0x15 read the ID card number
7. 0x16 write T5577 card number
8. 0x17 reads all sectors of all blocks of data (M1-1K card)
Return
1. 0x81 returned successfully
2. 0x80 returned operation failed
Data length: the length of the data behind, and if it is 0, then the data does not need to appear
Data: read and write data;
Send data:
Read the specified sector: the first byte in the data represents the sector, the second byte represents the first block of the sector, the third byte indicates the A group password, or the B group cipher (0x0A/0x0B), followed by the 6 byte password.
Write data in specified sectors: the first byte sector, second byte sector the first few blocks, third bytes of password or password in A group B group (0x0A/0x0B), followed by 6 bytes of password, then 16 bytes of data block.
Change the password: the first byte in the data represents the first sector, the second byte represents the A group password, or the B group password (0x0A/0x0B), then the old password of the 6 byte, and then the new password of the 6 byte.
Receive data:
Read the specified sector to return the data format. The first byte is the sector, the second byte is the first block of the sector, and then the 16 byte block data.
XOR: in addition to the protocol header, the results of other bytes are checked
Example：
AB BA 00100010
AB BA 001104, 6D, E9, 5C, 17, DA
AB BA 0012090001, 0A, FF, FF, FF, FF, FF,, FF,...
AB BA 0013190001, 0A, FF, FF, FF, FF, FF, FF, 0001020304050607, 0809010203040506, two
AB BA 0014, 0E 00, 0A, FF, FF, FF, FF,, FF, FF,...
AB BA 00150015
AB BA 001605 2E 00 B6 A3 02 2A
AB BA 1707, 0A, FF, FF, FF, FF,, FF, FF, 1A