TYPE 1- ESP32 based 4 Digits Digital Objects Counter with Relay, 4 Channels RF remote control, WiFi

TYPE 1- ESP32-Based 4-Digit Digital Object Counter (0–9999)

Overview

This ESP32-powered 4-digit digital counter is a smart and versatile device designed to count objects automatically or manually. It can display values from 0 to 9999 using a bright, colorful LED matrix display. The system uses a photoresistor–laser beam mechanism to detect passing objects and increment the count with precision.

With built-in WiFi, you can access a browser-based control panel directly from your phone or computer—no app installation required. Simply connect to the ESP32’s WiFi access point and manage the counter wirelessly.

Common Features:

• Automatic Object Counting:
  A laser beam constantly shines on the photoresistor. When the beam is interrupted (object passes through), the counter increases by one. Users can restrict photoresistor from counting via web interface.

• Manual Controls and RF remote control
  Three onboard buttons let you control the counter easily:

  • UP: Increase count manually

  • DOWN: Decrease count manually

  • RESET: Reset the counter to zero

  • Includes RF remote control module
    Supports RF remote control for wireless count up and count down

• WiFi Access & Web Control:

  • Connect to WiFi network: SSID: ESP32_COUNTER_AP | Password: 12345678

  • Open browser and visit http://192.168.4.1

  • Access an intuitive web interface to:

    • Increment or decrement the count remotely

    • Set a specific count value, for example, 453

    • Automatically turn ON a relay once the set count value is reached

    • Stop further counting after reaching the target value

    • Enable or restrict photoresistor-based counting when required

    • Change display color

    • Integrated relay output for automation or external device control

• Customizable Display Colors:
  Choose from five vivid colors — Yellow, Red, White, Green, and Blue — for the 4-digit display. Use web interface for changing colors. Colors are saved even power is turned off.

• Data Memory (Power Loss Protection):
  The ESP32 automatically remembers the last count and color settings, even after power disconnection.

• Display Options:
  Can be used with two display sizes,
  

  • P3 Display (3-inch digits)-192mm x 96mm included in the package

  • P5 Display (5-inch digits)- 320mmx160mm- users can purchase this separately
    Both use 64×32 LED matrix panels for clear, high-contrast numbers.

• Power Supply:
  Works with 5V 4A power adapter (not included).

• Plug-and-Play Design:
  No assembly required. Comes fully pre-wired and tested. (Enclosure not included.)

• Includes Laser Module:
  High-quality laser emitter included for reliable photoresistor detection.

• Includes a dedicated HC-12 communication header

• Supports connection to a mini objects counter via HC-12 wireless module

• Mini counter can be placed anywhere within up to 500 meters range

• Counted values from the mini counter are wirelessly transmitted to the main unit

• Main unit displays the received count on a 64×32 dot matrix display

• Ideal for distributed counting systems, long-distance counting, and automation setups

Applications & Uses

This counter is suitable for a wide range of industrial, commercial, and hobby projects, including:

• Factory or workshop production lines – count items as they pass on a conveyor.

• People counters – monitor entries or exits through a doorway.

• Event or game scoring systems – track scores or hits.

• DIY electronics projects – educational or experimental use.

• Inventory or packaging lines – automatic quantity tracking.

• Exhibition and display counters – show live object or visitor counts.

General Specifications

Package includes:

• 1 x Objects Counter Module
• 1 x P3 64×32 dot matrix display- 192mm x 96mm display

What's not included:

You need to purchase these separately:

1. 5V 4A power supply(essential)
2. RF remote control(Optional)
3. HC-12 RF module and Mini HC-12 objects count transmitter set (Optional)