The Walter module is here! A high-quality ESP32-S3 module with NB-IoT, LTE-M, and GPS. It’s now available for immediate purchase and integration into your projects.
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Walter is now fully available for purchase! With CE and FCC certifications (2BDGUWALTER), it’s ready to help businesses and developers build connected devices with ease. Experience ultimate flexibility and reduced product certification costs.
The Walter module schematics are available under the GPLv3 license.
The Walter module comes with CE and FCC certifications, streamlining your time to market. FCC ID: 2BDGUWALTER
All I/O pins are accessible, offering maximum layout flexibility.
Program the module using Arduino IDE, Micropython, JavaScript, or the Espressif IDF.
Walter’s ESP32-S3 provides WiFi and BLE connectivity, while the Sequans modem supports NB-IoT, LTE-M, and GPS.
The module is designed and manufactured in the European Union, ensuring long-term availability.
We promise we won't spam you with daily mail. You will be kept up-to-date about our upcoming crowdfunding campaign, hardware and software updates.
Walter is present on the Embedded World 2023 fair in Nuremberg, Germany, from 14 - 16 March. You can find us in hall 3 booth 3-539. Enter your name and email to receive a free ticket within 48h. See you at the fair!
Although Walter has a powerful processor and many wireless technologies aboard, the module has a very small form factor of only 55mm x 24.8mm.
The ESP32-S3 microcontroller allows any peripheral to be routed to any IO pin. On top of that no exposed IO pins are strapping pins, this means you have the freedom to layout your Walter based board as you wish.
The board uses an ultra high efficiency DC-DC converter for optimal power performance. Walter consumes only 9.8µA of power in deep sleep while the modem is in PSM mode.
Besides the various low power and deep sleep modes of both the ESP32-S3 processor and GM02SP modem, Walter has a mosFET switched and software controllable peripheral power pin. This allows you to completely remove power to attached devices, such as sensors, when you don't need them.
GPIO pins
Wireless technologies
GNSS receiver
Supported toolchains
CPU cores
"Cellular is gaining in popularity thanks to NB-IoT and LTE-M making it possible to leverage existing, secure infrastructure already deployed worldwide by operators, but adding cellular connectivity to an embedded design can be tedious and long, unless there was a module offering an almost plug and play solution… Introducing Walter!"
"Where is #Walter? He is finally here. I backed the DPTechnics bv Walter on #CrowdSupply and received my units last week. It is an #ESP32-S3 powered #cellular development kit with a Sequans Communications NB-IoT modem and SIM slot. I connected it today using a 1NCE SIM and #1NCE #OS to Datacake and I can send and receive data. It also serves as a pin-compatible replacement for the discontinued but amazing #Pycom GPy. But besides #Python, you can also use #Arduino to program this device, which I did. It works super great. Stay tuned for a template that we will deliver soon. #IoT #IIoT #nbiot #5g"
"We have converted our GPy application over to Walter with good results. Key points include:
Our hardware design has not changed. The Walter was a plug-in replacement for the GPy.
Minor changes to the code were required due to different pin assignments.
One great improvement with Walter is the ability to reset the modem from the software directly.
Another great feature is that we can now run the latest version of MicroPython unchanged with Walter (a fork is not required).
Thanks for the great work!"
"The ESP32-S3 Walter is a low-cost, low-power microcontroller with integrated WiFi and Bluetooth 5 (LE) capabilities. Its unique architecture affords Walter an array of wireless connectivity options – including Cat-M1 (LTE-M), GNSS, and NB-IoT – all within a compact device that can easily accommodate virtually any use case."
The below prices are MSRP prices for 1 piece, please contact use for volume pricing.
The bare module packaged in an antistatic bag
The reference carrier board, the basis for your IoT gateway
Rocket launch your product design with the Walter devkit
We are curious to see what you will build with Walter and discover the wide range of possibilities. Subscribe on the newsletter to get notified on the latest developments.
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