We haven’t sent any updates in 2025, but that doesn’t mean we have been idle. Walter has traveled to trade shows around the world and, together with you, our users, we have been working on fantastic projects based on the Walter module. We also launched our unified communications library, and the BlueCherry.io platform integration examples have been improved.

Next year, we will continue working on the software, traveling around the world to meet you in person, and developing new tooling to make working with Walter even easier.

We’re Exhibiting at CES Las Vegas 2026!

We’ll be showcasing our latest IoT innovations at CES 2026, held at the Las Vegas Convention Center from January 6–9, 2026.

• Find us at Booth 11066
• IoT Infrastructure Zone

At our booth, we’ll be demonstrating:

• Walter - our future-proof multi-radio (LTE-M, NB-IoT, WiFi, BLE, GPS) IoT module with the Sequans Communications GM02SP and Espressif Systems ESP32-S3
• LTE connected Commodore 64: yes, Walter and the Commodore 64 can be friends!
• Custom IoT development - demonstrating how we make custom IoT solutions simple, even for low-volume projects
• IoT platforms for LPWAN cellular - discover how we're using BlueCherry.io in combination with Walter to manage devices in the field, even with very low bandwidth connections such as NB-IoT

Get $149 off your registration by using our code "ECCmSvVr" when signing up: https://CES.tech/register. We hope to see you in Las Vegas! Let’s build the future of IoT together.

The C64, Now Connected to LTE via Walter

Unlock modern wireless connectivity for your Commodore 64 with this open source expansion card powered by the Walter module. Plugged into the C64 user port via UART, it brings multiple radio connectivity technologies to your retro machine. Now you can log on to your favorite BBS even while sitting in the middle of a park! Ready to add cutting-edge connectivity to your setup? Explore the full open source design at https://github.com/QuickSpot/c64-cellular

Unified Communications Library

The Walter-Modem library for Arduino, ESP-IDF, or Micropython makes it easy to use the modem without writing AT commands. The library is designed to get the maximum out of the modem by offloading connectivity and protocols to it. However, switching between cellular and Wi-Fi is less trivial.

That’s why we have released the unified communications library for Walter, built on top of esp-modem. This library uses the modem in PPP mode and runs the protocol stacks on the ESP32-S3, allowing seamless switching between Wi-Fi and cellular. We’re already using the library in multiple scenarios. For example, an e-bike control module that connects to your home Wi-Fi when in range and switches to cellular when on the road. Many other use-cases are possible. Check it out, we’re curious to see how you’ll use the unified communications library.

We Wish You a Merry Christmas and a Happy New Year

It feels like we wrote the end-of-year newsletter for 2024 only yesterday, but here we are, 2025 is coming to an end. As you can see on the map, the community around Walter has grown tremendously and we cannot thank you enough for your support on this journey.

We’re looking forward to working together in 2026. Hopefully, we can meet in person at one of the events below:

• CES - Las Vegas, USA, January 6 - 9
• Embedded World - Nuremberg, Germany, March 10 - 12
• Advanced Engineering - Ghent, Belgium, May 21 - 22
• Hardware Pioneers Max - London, UK, June 10 - 11
• Embedded World North America - Anaheim, USA, September 21 - 23
• IoT Sparks - Valencia, Spain, October (date to be announced)

Wishing you joyful holidays and looking forward to building a more connected future together in the New Year!