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. Users can change the colors. 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.
Features:
Automatic Object Counting:
A laser beam constantly shines on the photoresistor. When the beam is interrupted (object passes through), the counter increases/decreases by one. Users can restrict photoresistor from counting via web interface.
-Manual Controls
Three onboard buttons let you control the counter easily:
UP: Increase count manually
DOWN: Decrease count manually
RESET: Reset the counter to zero
WiFi Access & Web Control:
Connect to WiFi network: SSID and password will be given to customers.
Open browser and visit the link given to customer(cannot write here because of Ebay Policy)
Access an intuitive web interface to:
Increment or decrement the count remotely
Set a specific count value, for example, 453
Stop further counting after reaching the target value
Enable or restrict photoresistor-based counting when required
Change display color. Options are: RED, GREEN, BLUE, WHITE and YELLOW.
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 INDOOR Display (3-inch digits)-192mm x 96mm Included
P5 INDOOR Display (5-inch digits)- 320mmx160mm- you can choose to purchase separately
Both use 64×32 LED matrix panels for clear, high-contrast numbers.
Power Supply:
Works with 5V 4A power adapter
Plug-and-Play Design:
No assembly required. Comes fully pre-wired and tested. Enclosure is included.
Includes Laser Module:
High-quality laser emitter included for reliable photoresistor detection.
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.
Package includes:
1 x Objects Counter with 3D printed PETG Enclosure
1 x P3 INDOOR 64×32 dot matrix display- 192mm x 96mm display- DEFAULT
1 x P5 INDOOR 64×32 dot matrix display- 320mmx160mm display- OPTIONAL- purchase separately
1 x Laser Module with 3D printed PETG enclosure
1 x 5V 4A power supply
We are selling exactly same objects counter with 4CH remote control also:
View this item
About 3D printed enclosure:
Small layer lines, marks and glue marks are normal characteristics of a 3D printed PETG enclosure. It is not intended to compete with an injection-moulded enclosure in cosmetic perfection; instead, it is designed to work well, hold the electronics circuitry securely and give your project a professional finished appearance.
Customization is available. Please contact us before ordering if you require modifications.