RFIDGeek/Univelop RF500B RFID Module
This is the RFID Module sold by RFIDGeek/Univelop Tech. While this little module might not look like much, it IS true what they say, “Good things come in small packages”.
By wiring +5 and Ground, as well as RS232 RX and TX to the board, you can use the included program to read and write to/from MiFare cards.
The company website (RFIDGeek.com) does not do the module justice. This little ~1.35″*2.25″ RFID reader/writer module packs the following onboard:
Top Side:
- Fudan Microelectronics FM1702NL (32-pin SOP): [PDF] Parallel or SPI Interface (Note, the higher models, FM1715NL and FM1725NL both share a common pinout, and offer increased features [see the PDF]. I wonder if the board would work with one of these instead of the FM1702…)
- 13.56Mhz Crystal
- Sipex SP232EEN: TTL-RS232 Converter
Bottom Side:
- LSI 1021WI?: (8-pin SOP, bottom side of the module)
- Unknown Microcontroller: (44-pin, ID has been shaved off)
- 11.0592Mhz Crystal
There is space available to add pin headers to the board for each of the following: (All of these are subject to change and/or verification)
J1: Antenna Interface
- Ground
- Transmitting Antenna 1
- Ground
- Transmitting Antenna 2
- Ground
- Receiving Antenna
J2: Microcontroller Interface
- Control Output
- Buzzer Output (High)
- RS485 Control (Low)
- VCC
- Reset Onboard MCU (High)
- Ground
- UART Receive
- UART Transmit
J3: Microcontroller SPI? (For the “Module 500” Only?)
- SPI Clock Out from FM1702NL Pin 24
J4: RS232 I/O
- VCC (+5V)
- RS232 Receive
- RS232 Transmit
- Ground