1. The Tanmatsu LoRa Radio Deck is designed for open hardware customization and repair, promoting user modification in the field.
2. It features a powerful ESP32-P4 SoC with dual RISC-V cores and a dedicated co-processor for wireless communication, supporting versatile off-grid applications.
3. The device includes a 7-inch display, full QWERTY keyboard, and modular LoRa radio supporting multiple frequency bands, making it suitable for secure messaging and mesh networking.
4. Expandability with SAO and PMOD ports allows integration of custom sensors and antennas, enhancing project versatility.
5. Open project files and an early release plan aim to enable early DIY building, with a planned release in Q2 2026.
Introduction to the Tanmatsu LoRa Radio Deck
Valleytech Custom Solutions has recently released their first build guide for the innovative Tanmatsu LoRa Radio Deck, a device designed for those who want off-grid communication, and who prefer to control their hardware. Unlike most consumer gadgets that are closed systems, this device embraces open hardware principles, giving users the opportunity to modify or repair it in the field if needed. Designer Renze Nicolai aims for a simple yet user-centric approach where customization and repair are prioritized over sleek concealment.
Technical specifications of the core components
The central element of this handheld device is the ESP32-P4 SoC, which costs around $32. This chip significantly enhances the processing power with two RISC-V cores running at 400 MHz, supported by 32 MB of PSRAM and 16 MB of flash memory. To optimize performance, a secondary ESP32-C6 co-processor is tasked with WiFi 6 and Bluetooth 5 wireless functionalities, keeping the main CPU free for user interface operations. The layout ensures better multitasking and efficiency for off-grid operations.
User interface and connectivity features
On the front, the device boasts a 7-inch MIPI DSI display with an 800 x 480 resolution, making it suitable for various visual applications. The robust 3D-printed enclosure contains a full QWERTY keyboard with tactile dome switches for easier typing in the field. For storage, a dedicated microSD card slot allows for quick firmware upgrades, while a USB Type-C port is used for charging the built-in lithium battery. This combination aims to make changing operating environments and managing files convenient for users in remote locations.
LoRa radio integration and expandability
The device features a modular LoRa radio that operates on 433 MHz and 868 MHz bands, making it a powerful node for secure messaging via the Meshtastic protocol, particularly when cellular service isn’t available. The back panel includes SAO and PMOD expansion ports, giving savvy builders the ability to add custom sensor modules, high-gain antennas, or other peripherals to suit their project needs. This flexibility is perfect for tailored communication setups or experimental projects.
Availability, licensing, and DIY Kits
Valleytech plans to launch the first production batch of the Tanmatsu LoRa Radio Deck in early Q2 2026. Pricing details are yet to be confirmed, but the project files are already accessible under the CERN Open Hardware License, encouraging DIY enthusiasts to build their own versions. With a 3D printer and some soldering skills, users can create a custom communication hub prior to official retail release, promoting accessibility and grassroots innovation in off-grid connectivity solutions.
