DPTechnics
Networking
Microcontroller Boards
This project is launching soon.
Walter Cat 1 bis is a small-form-factor IoT SoM that adds support for worldwide LTE Cat 1 bis to the powerful ESP32-S3 SoC. On top of the ESP32-S3’s many built-in peripherals—such as UART, SPI, I²C, CAN, Wi-Fi b/g/n, and Bluetooth 5—Walter also features the Sequans GC02S1 LTE Cat 1 bis modem.
Walter Cat 1 bis can be used for both prototyping and production, as it will be certified for FCC, CE, RCM, and IC. We also guarantee a minimum of ten years of availability, making it a uniquely reliable building block for your IoT application.
Walter Cat 1 bis comes with a range of 100% open source software libraries to get your IoT project up and running in minutes, so you can work in familiar languages and toolchains. Supported environments include ESP-IDF, Arduino, MicroPython, Toit, and Zephyr. No special dongles are needed to program Walter – just connect it directly to your development machine via a standard USB Type-C cable.
The Walter Cat 1 bis module is the second member of the Walter family of modules. It is fully interchangeable with the original Walter module, both in hardware and in software. This allows you to design your carrier board first and choose your cellular technology later.
Walter Cat 1 bis excels when it comes to global connectivity. Any IoT application that requires cellular connectivity is a great fit. A few examples that become practical and economically viable, even at low volumes, include: asset tracking, vehicle telematics, security systems, payment processing, wearables, smart-city applications, and scientific measurement equipment.
LTE Cat 1 bis technology provides low latency and high bandwidth relative to other LPWAN technologies like LTE-M and NB-IoT. Ideal applications include…
Worldwide tracker: Because it can connect to any LTE network, Walter Cat 1 bis lets you build a tracker that works with any cellular provider anywhere in the world. You can use the built-in Wi-Fi and BLE to save power when precise GNSS positioning is not required. Walter Cat 1 bis also comes pre-flashed with tracking firmware that uploads data to the walterdemo.quickspot.io demonstration platform.
Remote camera: With 10 Mbps download and 5 Mbps upload speeds, Walter Cat 1 bis provides plenty of bandwidth. A video stream or high-definition photo stream is well within reach. Think of a wildlife or traffic camera sending images from virtually anywhere.
These examples are just the beginning. Our team is already exploring ideas like remote picture frames and drone controllers, and we would love to hear your creative ideas. Maybe we can turn one into an open source build challenge!
ESP32-S3-WROOM-1-N16R2 microcontroller
Sequans GC02S1-WW modem
Inputs & outputs
Power supply
Vin pinForm factor
Software
Certifications
Walter Cat 1 bis has been fully designed and tested using the EU version of the Sequans GC02S1 modem. In the coming months we will receive engineering samples of the GC02S1-WW, which we will use to finalize the software libraries. Once the production version of the GC02S1-WW is available, we will carry out conformity testing and launch Walter Cat 1 bis. We currently estimate completing this process by Q4 2026.
We are continuously improving the documentation for Walter Cat 1 bis and its accessories, and we actively encourage everyone to contribute. The following resources are currently available:
In the coming months, once our internal testing is complete, we will publish the schematics for Walter Cat 1 bis, just as we did for the original Walter module.
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· dptechnics · dptechnics · dptechnics.com
We develop and produce next-generation, internet-connected products, from embedded systems to software to industrial design. QuickSpot is our line of IoT building blocks designed to help you focus on your product rather than on low-level technical details.
