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.

No Hassle, No Setup

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!

Serial Connection Using USB-TTL Convertor

Wireless Serial Connection Using Host-to-Client WiSer Devices

WiSer is fully open source and works with a wide range of devices and operating systems. Whether you’re working on Windows, Linux, Mac, or Android, it provides a convenient, reliable solution for hassle-free serial communication via PuTTY, Tera Term, screen, or just about any other terminal application you can think of.

Bridging the Wireless Gap

While USB to UART converters are common in the market, the options become limited when seeking wireless functionality. Many existing solutions require custom software, drivers, or are tied to specific operating systems. Ready-to-use wireless serial bridges often require users to handle data over TCP or UDP. This, in turn, requires additional software bridging for the integration of data into serial applications.

WiSer Addresses These Challenges by…

• Providing direct serial port access on the host system
• Eliminating the need for software or driver installations
• Offering true wireless mobility for users
• Allowing you to switch host systems seamlessly
• Supporting all major operating systems for maximum flexibility

For Developers, Engineers, and Hobbyists Alike

Whether you’re a professional in electronic engineering or an embedded systems enthusiast, WiSer caters to a broad spectrum of users. From initial board bring-up to debugging firmware, viewing logs, or flashing firmware, WiSer enhances the traditional USB to UART converter experience by offering true wireless freedom. It’s perfect for both professionals and hobbyists.

Key Benefits

• Wireless Freedom: No need to be tethered to the hardware under test
• Safety Assurance: Electrically isolate your host system from your target device, preventing physical harm or electrical damage
• Driver-Free Operation: Built-in virtual serial port drivers on all modern operating systems
• Versatility: Ideal for Raspberry Pi, ESP32, Arduino, and more
• Programmability: Remote programming for ESP32, Arduino, or any microcontroller with in-system serial programming support
• Compatibility: Supports standard and custom baud rates up to 921,600 baud
• Hardware Control: Equipped with hardware flow control for GSM modems, Bluetooth modules, and similar devices

Applications

WiSer opens up a world of possibilities for wireless serial connectivity…

• Wireless programming & debugging of microcontrollers like ESP32 and Arduino
• Wireless access to the serial port of a Raspberry Pi or similar SBC
• 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 remote-control 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

Just Plug It In & Get to Work

WiSer’s plug-and-play nature makes it exceptionally easy to use. Take the Raspberry Pi, for example. Just connect WiSer-TTL to the Raspberry Pi’s serial port pins, as depicted in the image below, then plug WiSer-USB into the host system, and connect to the serial port using your preferred terminal software. Ensure that the serial port is enabled in the Raspberry Pi’s configuration file. For more detailed steps, visit here.

Need a Wireless Serial Connection Between Two Hosts?

The Host-to-Host version of WiSer includes two WiSer-USB devices. Plugging one into each host system establishes a wireless serial connection that can be used for various forms of host-to-host communication. For a more detailed example, see our Wireless Serial Communication Between Two Host Systems Using WiSer article on Hackaday.

Features & Specifications

• Built around the 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
• Data protection using AES-CCMP encryption
• 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 stop bits: 1 bit, 1.5 bit, 2 bit
• Supported flow control: software (XON/SF), 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)

Comparisons

Support & Documentation

WiSer is a fully open source project. We’ve published all of our design files, source code, and documentation on GitHub so you can inspect its inner workings. Our goal is to empower users, making it easy to program, understand, customize, and troubleshoot WiSer. Meanwhile, if you have any questions, you can reach out using the appropriate Ask a question link below.

Quick links

• Sourcecode & hardware design files
• WiSer Quick Start guide
• WiSer product manual
• WiSer specification
• Hackaday project logs

Manufacturing Plan

Our final prototypes have been manufactured and validated, and we’ve received quotes from product houses and part suppliers. Conversations with suppliers are underway to secure components based on the orders we receive in the early stage of the campaign. We’ve also developed a production test tool that loads firmware onto WiSer devices and pairs them in a single go. Stay tuned for regular campaign updates so you can follow our progress!

Fulfillment & Logistics

WiSer will be produced and assembled by our contract manufacturer in India. QA testing and kitting will be handled at Bitmerse LLP in Ahmedabad, Gujarat, India. After packing and labeling the various WiSer kits, we will send them to Crowd Supply for fulfillment through their logistics partner, Mouser Electronics. For details on ordering, payment, and shipping, check out this useful guide.

Risks & Challenges

Launching any new product involves risks, but we’ve taken steps at every stage of development to minimize those risks and maximize the likelihood of on-time fulfillment. Among other mitigations, we have already identified partners for PCB fabrication and enclosure manufacturing and developed an automated testing tool capable of programming and configuring WiSer. If we encounter unexpected issues or delays, we will be sure to let you know—and explain how we are working to address them—in a detailed campaign update. We are committed to transparency and will keep you informed every step of the way.