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This RFID module is designed for reading code from 125Khz card compatible read-only tags and read/write card. It will notify whenever 125Khz tag approaches, the tag serial number will be send via TX pin or Wiegand pin. Super small size design, it is widely applied in office/home security, personal identification, access control, anti-forgery, interactive toy and production control systems etc.
Small Outline Design
Pre-Soldered Mini Antenna
UART TTL Interface
Maximum Effective Distance Up To 35mm
Support EM4100 Compatible Read Only or Read/Write Tags
Working Frequency: 125Khz
Baud Rate: 9600
Interface: TTL or Wiegand26
Working Voltage: DC 3.3V - 5V
Working Current: 19mA - 25mA
Reading Distance: Max.35mm
Working Temperature: -10℃ to +70℃
Storage Temperature: -20℃ to +80℃
Humidity: 0% - 95%
Antenna Diameter: 15mm
Antenna Inductance: 388uH
PCBA Dimension: 18 x 13 x 3.7mm
Source Code at Github
Here is the Card number frame format: hexadecimal ID code (4 bytes) + check code (1 byte).
For example, The number on the ID card is 0009321926 14215814,
The output is 00 8E 3D C6 75 (75=00^8E^3D^C6).
This page says EM4100 cards have 64 bits of data: http://www.priority1design.com.au/em4100_protocol.html
Hi tom~You can see pin map in the page below. Regards
Hi there, we do not have the FCC certification for this module and there is no plan yet this moment. thanks.
I did a little reverse engineering by myself, so:
1. There's no special RFID-IC on the module. It's a Microcontroller from ST: STM8S003F3
2. The RST-Pin is the RESET of the Microcontroller. I still don't know what the S-Pin is for..
3. Now I can read from the UART. The supply voltage was too low.. My fault. But why is it reading just four numbers instead of five? I know that there are five numbers stored on my RFID-Tags.
Hi terry, please drop mail to firstname.lastname@example.org for the detail info. thanks.
Hi there, I suspect you use the arduino uno D0/D1 for serial print and rf module communication as well. it is conflict. so please use the D2/D3 for rf module communication and D0/D1 for serial monitoring. Please send mail to email@example.com. I will forward the code to you. thanks.
Hi Dear Customer, this reader uses the serial port. we suggest the software serial to readers, and hardware serial port for the PC display. So you can connect multiple readers. Bill