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Grow KL202 +R503 DC12V Low Power Consumption Ring Fingerprint Access Control Board

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Fingerprint Sensors for everyday users

The Grow KL202 +R503 DC12V Low Power Consumption Ring Fingerprint Access Control Board is a mid-range fingerprint sensors designed for everyday users. It features Item Type: Control Board and Operating Voltage (V): 10 to 24.

₹3,648
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Total: ₹3,648
Buying tip: A quality investment for dependable performance and premium build quality.
Estimated delivery: 24 Aug7 Sept
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Quick Specs

Item Type: Control Board
Operating Voltage (V): 10 to 24
Model No. / Name: KL202
Processor: STM8
Output Type: Relay (Max current: 10A)
Fingerprint Capacity: 120

Ideal For

Electronics projectsArduino / Raspberry Pi buildsPrototyping
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SKU: robu-835802Category: Fingerprint Sensors

About This Product

The Grow KL202 +R503 DC12V Low Power Consumption Ring Fingerprint Access Control Board is a mid-range fingerprint sensors designed for everyday users. It delivers reliable performance at an accessible price.

Key Specifications

  • Item Type: Control Board
  • Operating Voltage (V): 10 to 24 — works with standard household power
  • Model No. / Name: KL202
  • Processor: STM8 — smooth, lag-free performance
  • Output Type: Relay (Max current: 10A)
  • Fingerprint Capacity: 120
  • Scanning Speed: < 0.2 second
  • Verification Speed: < 0.3 second

Why Buy from Elecvora?

Elecvora sources this product directly, cutting out multiple middlemen. Every order includes free shipping, a 15-day return policy, and secure payment via Razorpay.

This Grow KL202+R503 DC12V Low Power Consumption Ring Fingerprint Access Control Board is an all-in-one control board with the onboard STM8 microcontroller. This module can act as a standalone system for the fingerprint access control system. The board comes with an onboard relay which is activated by the microcontroller when the fingerprint is detected. The activation time of the relay can be controlled via a multiturn potentiometer, which can be adjusted through 0.5 sec -13 sec.

How To Use:
  1. After providing power to the module, the module will be in its initial factory mode where any fingerprint can activate the relay.
  2. To register the fingerprint long press the SET  button for 3-4 sec, when the BLUE LED starts blinking it indicates that the module is ready to register the fingerprint.
  3. Now place the finger which you want to register on the scanner and after the 5 beeps remove the finger. If you want to add other fingerprints then you can add or wait for some time till the LED stops blinking.
  4. After the LED stops blinking you can use the registered fingerprint to activate the relay. When a registered fingerprint is read by the sensor the BLUE led will glow around the sensor and a RED/ORANGE led will glow if an unregistered fingerprint is detected.
  5. The SET time of the relay can be adjusted by the multiturn potentiometer.

Features:

  1. Low Power Consumption.
  2. 120 Fingerprint Capacity.
  3. Low Power Consumption.

Package Includes:

1 x Grow KL202+R503 DC12V Low Power Consumption Ring Fingerprint Access Control Board

Setup Guide

1
Identify the pins
Locate VCC (power), GND (ground), and data pins (SDA/SCL for I2C, MOSI/MISO for SPI, or TX/RX for UART). Refer to the pinout diagram on the product page.
2
Wire to your microcontroller
Connect VCC to 3.3V or 5V (check the module spec), GND to GND, and data pins to the appropriate GPIO pins on your Arduino or Raspberry Pi.
3
Install libraries
In Arduino IDE, go to Sketch → Include Library → Manage Libraries and search for the sensor library. Install the recommended version.
4
Upload example sketch
Open File → Examples → [library name] → Basic Example. Upload to your board and open Serial Monitor to view output.
5
Calibrate if needed
Some sensors (temperature, humidity, distance) may need a short warm-up period or calibration. Run the calibration sketch if provided.