RDM6300 RFID Reader Module Features
If you are a little familiar with electronics then you have probably heard of RFID (Radio-Frequency-Identification). The RDM6300 model is one type of RFID modules with 125 kHz frequency. This module is designed for reading code from 125KHz (ID) compatible read-only tags and read/write 125KHz cards.
- Support external antenna
- Maximum effective distance: up to 50 mm
- Uart interface
- Small outline design
RDM6300 RFID Reader Module Pinout
This module has 9 pins:
- VCC: Module power supply – 5V
- GND: Ground
- RX: Data Receive pin
- TX: Data Transmit pin
- ANT1: Antenna connection pin
- ANT2: Antenna connection pin
- LED: LED pin – This pin will be HIGH when there is no tag near module. When a tag is near module, it will change from HIGH to LOW for a short period of time.
You can see the pinout of this module here.
Interfacing RDM6300 RFID Reader Module with Arduino
Step 1: Circuit
The following circuit shows how you should connect Arduino to RDM6300 module. Connect wires accordingly.
Step 2: Code
Upload the following code to Arduino.
/* RDM6300-125KHz-RFID modified on 20 Jan 2020 by Amir Mohammad Shojaee @ Electropeak
In this program, SoftwareSerial is used because we need to access to 2 other serial pins. When we bring the tag close to the RFID module, the tag will be read and its special ID will be displayed on the Serial Monitor.
We bring two different tags closer to the module one after another and then take them away. You can see that, at first, each tag is identified and then its specific data is displayed on the Serial Monitor.