The EM-18 RFID Reader Module 125kHz is an essential workshop module engineered for wireless, non-contact identification projects. TTL Serial UART output (9600bps, 8 data bits, no parity, 1 stop bit) · 4.5V to 5.5V DC (current consumption <50mA).
The EM-18 RFID Reader Module 125kHz is an essential workshop module engineered for wireless, non-contact identification projects. Operating at a frequency of 125kHz, it radiates an electromagnetic field through its built-in coil antenna to power passive RFID cards and keyfobs brought within its 5cm to 10cm read range.
When a compatible tag is detected, the module instantly transmits the unique 12-character ASCII card ID via a straightforward TTL serial UART interface (9600bps), allowing seamless integration with Arduino, ESP32, and other microcontrollers without requiring complex SPI libraries.
| Operating Frequency | 125kHz low-frequency RF reader technology |
|---|---|
| Communication Interface | TTL Serial UART output (9600bps, 8 data bits, no parity, 1 stop bit) |
| Operating Voltage | 4.5V to 5.5V DC (current consumption <50mA) |
| Reading Distance | 5cm to 10cm depending on tag size and orientation |
| Compatibility | Supports standard 125kHz EM4100 / EM4001 64-bit RFID cards and keyfobs |
| Onboard Indicators | Integrated status LED and buzzer support for read confirmation |
What is the operating voltage?
4.5V to 5.5V DC (current consumption <50mA).
Which interface does it use?
TTL Serial UART output (9600bps, 8 data bits, no parity, 1 stop bit).
Is it compatible with Arduino and ESP32?
Yes. It works with Arduino, ESP32, Raspberry Pi projects.
Can I buy the EM-18 RFID Reader Module 125kHz in Kanpur?
Yes – buy online with delivery across India, or pick it up from the iTechBuilders store, Damodar Nagar, Kanpur.
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