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Λειτουργεί η Σειριακή Θύρα σας;

Click Connect to detect and communicate with serial port devices — Arduino, microcontrollers, GPS receivers, and more — all directly in your browser.

This tool uses the Web Serial API to connect to serial port devices, verify the connection, and optionally send and receive data. It tests whether your serial port hardware and drivers are functioning correctly.

The Web Serial API (Chrome 89+) supports baud rates from 300 to 4,000,000, covering everything from legacy RS-232 devices at 9600 baud to modern high-speed microcontrollers.

Τι Σημαίνουν τα Αποτελέσματά σας;

Result Range Meaning
Καλό Device connected and data flowing Your serial port is working correctly. The device is recognized, the connection is established, and data can be sent and received.
Προειδοποίηση Device detected but no data or garbled output The connection works but communication may have wrong settings. Check baud rate, data bits, stop bits, and parity match your device's configuration.
Κακό No serial ports detected or connection fails The Web Serial API may be unsupported (requires Chrome/Edge), the device driver is missing, or no serial device is connected.

Συνηθισμένα Προβλήματα και Λύσεις

Browser shows 'Web Serial API is not supported'

Web Serial requires Chrome 89+, Edge 89+, or Opera 75+. Safari and Firefox do not support it. Ensure you are using HTTPS or localhost, as the API is not available on insecure HTTP pages.

Device is plugged in but not listed in the connection prompt

Check that the correct drivers are installed (e.g., CH340, FTDI, CP2102 for common USB-to-serial chips). On macOS, you may need to approve the driver in System Settings > Privacy & Security. Try a different USB cable or port.

Σχετικά εργαλεία

Δοκιμή USB

Ανιχνεύστε και δοκιμάστε συνδεδεμένες συσκευές USB

Δοκιμή MIDI

Δοκιμάστε όργανα και controllers MIDI

Ταχύτητα USB

Δοκιμάστε την ταχύτητα μεταφοράς USB

Συχνές ερωτήσεις

How does the serial port test work?

It uses the Web Serial API to request access to a serial port device. Once connected, it can read and write data streams. The browser prompts you to select a device from the list of detected serial ports.

Which devices work with the Web Serial API?

Any device that presents as a serial port works: Arduino boards, ESP32/ESP8266, GPS receivers, barcode scanners, CNC controllers, 3D printers, and industrial RS-232 equipment connected via USB-to-serial adapters.

What baud rate should I use?

The correct baud rate depends on your device. Arduino defaults to 9600 or 115200. Check your device's documentation or firmware settings. Mismatched baud rates produce garbled or no output.

Is any serial data sent to an external server?

No. All serial communication happens directly between your browser and the connected device. No data is routed through, stored on, or transmitted to any external server.