WiSer allows you to establish a wireless, peer-to-peer serial connection between two devices. Debug code, log data, update firmware, or transfer files without the need for cumbersome USB cables, sketchy Wi-Fi routers, or Bluetooth configurations that never quite work right. Designed for simplicity and efficiency, WiSer requires no software, no drivers, and no setup. As far as your devices are concerned, it’s just a cable. Plug the USB module into your computer, connect the TTL module to your target device, open your favorite serial monitor, and enjoy being able to move around while you work!

WiSer is fully open source and works with a wide range of devices and operating systems. Whether you’re working on a Windows, Linux, Mac, or Android device—and whether you prefer PuTTY, Tera Term, screen, or something else—it provides a convenient, reliable solution for hassle-free serial communication.

For Developers, Engineers, and Hobbyists Alike

Serial intefaces aren’t going anywhere, and the list of possible for WiSer applications continues to grow. Examples include…

• Wireless programming and debugging of microcontrollers like Arduino, ESP8266, and ESP32
• Remote control and monitoring of robotics
• Remote configuration of embedded systems
• Wireless data logging and telemetry
• Remote access to industrial equipment
• Home automation and smart-home applications
• Remote control of drones and RC vehicles
• Wireless access to GPS and radio modules
• Wireless communication with energy-monitoring systems
• Wireless barcode-scanner integration
• Wireless remote control of appliances
• Wireless communication between two computers

Features & Specifications

• Based on ESP32-S2 Wi-Fi SoC
• No driver installation required
• Provides virtual serial port on host
• Targeted for modern devices with USB Type-C ports
• Compatible with Windows, Linux, Mac, and Android
• Peer-to-peer wireless communication over 2.4 GHz
• Supported baud rates: all standard and custom rates up to 921,600 baud
• Supported data bits: 6-bit, 7-bit, 8-bit
• Supported parity types: NONE, ODD, EVEN, MARK, and SPACE
• Supported flow control: software (XON/XOFF), hardware (RTS/CTS), and None
• Equipped with DTR control pin
• RX, TX, and CONN indicator LEDs
• "FIND PAIR" button to locate the paired device (useful when deploying multiple WiSer devices)
• "BOOT" button to update ESP32-S2 firmware
• Fully open-source
• Physical dimensions
  • WiSer-USB: 37.8 x 20.4 x 8.2 mm (35.8 x 14.4 x 4.7 mm without enclosure)
  • WiSer-TTL: 36.5 x 38.4 x 9.8 mm (28 x 29 x 4.3 mm without enclosure or header pins)

Open Source

WiSer is a fully open source project. Its design files, source code, and documentation will be published on GitHub before the campaign goes live. Our goal is to empower users by making it as easy as possible to program, understand, customize, and troubleshoot WiSer.

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