Walter is a cellular multi-radio IoT hardware module from DPTechnics BV. The official positioning is a solution for βbuilding certified cellular multi-radio IoT products faster.β It is not a traditional software development tool, but a combination of modules, carrier boards, and development kits for embedded developers. Its main goal is to reduce the integration and certification cost of LTE-M/NB-IoT, WiFi, BLE, and GNSS.
The Walter module integrates an ESP32-S3 and a Sequans GM02SP modem, supporting LTE-M, NB-IoT, WiFi, BLE, and GNSS in a 55 x 24.8mm form factor. Its CE, FCC, IC, RCM, and UKCA pre-certifications are valuable for teams moving toward production, as they can reduce the amount of certification lab work required. On the power side, it is rated at 9.8Β΅A with the ESP32-S3 in deep sleep and the modem in PSM mode, and it provides software-controllable peripheral power pins, making it suitable for battery-powered and energy-harvesting scenarios.
The development stack is fairly open, with support for Arduino, MicroPython, ESP-IDF, and Zephyr. The official site states that the Arduino cellular/GPS library is open source and maintained, while MicroPython uses the upstream ESP32 project without requiring a fork or patches. GPLv3 schematics are also available. The Walter Feels reference carrier board further adds MPPT, battery charging, temperature/humidity/pressure/IMU sensors, RS232, RS485, SDI-12, CAN, MicroSD, and other interfaces, making it well suited for quickly prototyping industrial or environmental monitoring devices.
Single-unit MSRP is β¬59 excluding VAT for the Walter Module, β¬125 for Walter Feels, and β¬250 for the Walter Devkit. The Devkit includes the module, LTE/GPS antennas, USB-C, a Soracom SIM, and 30 minutes of engineering support. Volume pricing requires contacting sales. Walter is suitable for IoT teams that need cellular connectivity, low power consumption, positioning, and pre-certification, as well as projects migrating from older solutions such as Pycom GPy.
Its strengths include consolidated wireless capabilities, clear certification coverage, multiple toolchain options, and relatively high hardware transparency. The limitations are that the bare module does not include antennas, so the complete BOM still needs evaluation; the Cat 1 bis version is marked for Q4 2026 and is not yet available; and information on enterprise support, warranty, and SLA is limited. There is no evidence in the main source regarding access from China, so this remains unknown. For real-world deployment, teams still need to confirm domestic carrier support for LTE-M/NB-IoT, SIMs, frequency bands, and certification. Payment methods are not disclosed, so buyers should confirm with the official team before purchasing.
β This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on quickspot.io official site.
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