LoRaMod

Advanced Wireless Modbus Router

Wireless Modbus Communication For Industrial Environments

Long-Range Modbus, Engineered Into the Device

LoRaMod - Advanced Wireless Modbus Router

LoRaMod is an advanced wireless Modbus router designed to extend Modbus RTU networks through a private, secure, long-range LoRa link, without altering the original system logic.

Network complexity, encryption, and communication management are integrated into the device itself, eliminating the need for physical cabling without adding intermediate infrastructure or architectural fragility.

LoRaMod acts as a coherent industrial extension, designed to coexist with existing systems and scale without repetitive engineering.

Available in Two Models for Different Integration Needs

LoRaMod is available in two versions that share the same communication architecture, integrated security, and industrial design philosophy. Both models extend Modbus RTU networks wirelessly while keeping the system logic intact, and at the same time, they are designed for different levels of complexity and scale in the field.

LoRaMod

LoRaMod is designed to be integrated as a structural node within the Modbus network. With a dedicated power input, LoRaMod can distribute power to its serial ports, allowing connected sensors or actuators to be powered directly and reducing field wiring complexity.

The two RS-485 ports can bypass data from one another, acting as an intermediate point on the line and maintaining the physical continuity of the bus while extending the network wirelessly.

LoRaMod Lite

LoRaMod Lite is designed for simple, straightforward, and compact integrations. It is powered through its own RS-485 port and functions as a dedicated wireless link to extend an existing Modbus segment without modifying the physical bus topology.

LoRaMod Lite is the right choice when the remote equipment already has its own power supply and you need to expand communication in a clean, reliable way while maintaining a clean, coherent network structure.

Designed for Real Industrial Deployments

Industrial & Manufacturing

Factory automation, process control, remote I/O expansion, motor and pump control, energy management systems, and SCADA integration.

Transportation & Rail

Remote railway signal monitoring, tunnel ventilation, wayside equipment status, and remote power monitoring in stations.

Energy & Power

Solar & wind farms, hydroelectric plants, BESS, substations and switchgear monitoring, as well as diesel generators and backup power systems.

Oil, Gas & Petrochemical

Pipeline pressure monitoring, wellhead control, tank farms, gas leak detection, and remote valve and flow monitoring.

Water & Wastewater

Pumping stations, water towers and reservoirs, sewage treatment plants, water quality sensors, and stormwater and drainage systems.

Agriculture & Irrigation

Precision irrigation, greenhouse control, soil moisture and temperature sensors, weather stations, and livestock environmental monitoring.

Ports & Offshore

Dockside power control, marine weather buoys, shipboard monitoring, and offshore oil platform systems.

Aerospace & Defense

Perimeter surveillance, temporary communication setups, and tactical deployment of sensor networks.

Forestry & Environmental

Remote fire detection sensors, air quality monitoring, rain gauges and weather sensors, and wildlife tracking systems.

LoRaMod’s Main Features

LoRaMod has been designed as a structural element within industrial Modbus networks, not as a simple connectivity accessory. Its technical characteristics are not the result of an accumulation of functions, but rather of engineering decisions aimed at maintaining consistency, security, and predictability in systems that must operate for years. Each capability—from wireless extension to routing and network management—is designed to reduce complexity in the field and facilitate clean integrations into existing infrastructures.

LoRaMod not only extends Modbus packets wirelessly; it functions as an industrial router that introduces structural control over the network.

Device Mappings: LoRaMod decouples the Modbus map from the controller from the actual addressing of remote devices.

Using a configurable Device Mappings table, LoRaMod allows the address space of the controller (PLC, data logger, or SCADA) to be decoupled from the actual space of devices in the field. The control system can operate with the most convenient logical ID map, while the downstream connected devices maintain their original physical addresses.

LoRaMod automatically manages traffic translation and routing, completely transparently to the controller. This avoids ID conflicts, simplifies progressive expansions, and allows legacy equipment to be integrated without reconfiguration, resulting in a more orderly, scalable, and maintainable network in the long term, even in installations where the architecture has evolved over many years.

LoRaMod incorporates an optional Modbus cache system designed to optimize wireless communication performance when required by the application. This functionality, manually activated by the user, improves both radio link efficiency and stability in the presence of controller timing limitations.

Modbus Cache compensates for wireless link latency by storing and delivering responses within the controller timeout.

When the Modbus register cache function is enabled, Upstream automatically groups requests addressed to the same device on consecutive registers—even with jumps of up to 16 addresses—consolidating them into a single, more efficient transaction. This reduces airtime and optimizes the use of the LoRa channel.

Additionally, responses received from the Downstream are stored in a cache with a configurable validity time. As long as there is no data update, the system can respond to new requests directly from that local memory. This is especially useful when the PLC or datalogger timeout is less than the actual round-trip time of wireless communication, avoiding errors in systems originally designed for wired links.

LoRaMod incorporates a security model based on Perfect Forward Secrecy (PFS) applied to each data packet transmitted.

Industrial-grade security with Perfect Forward Secrecy (PFS) per data packet

Each message has a unique, ephemeral encryption key, preventing the reuse of static keys over time. Even if an attacker were able to capture traffic over long periods, the potential future exposure of a persistent key would not allow adjacent communications to be decrypted. Each packet is protected by unique keys that cannot be reconstructed retrospectively.

By limiting the temporal impact of any security compromise and avoiding cumulative cryptographic dependencies, LoRaMod introduces an industrial-grade layer designed for systems that must operate securely over the long term.

Polite Spectrum Access (PSA): regulatory compliance and high frequency

LoRaMod implements a PSA mechanism to operate in sub-GHz ISM bands, aligned with applicable regulatory requirements and frameworks that include mechanisms such as Listen Before Talk and channel occupancy control. Before transmitting, the device evaluates the status of the radio channel and manages access in a controlled way, reducing interference with other systems sharing the same radio environment, which significantly increases the probability of packet delivery.

This mechanism also allows operation with transmission intervals typical of industrial environments, on the order of milliseconds, well below the typical times of conventional LoRa transmitters that operate on scales of seconds or minutes.

A basic LoRaMod network consists of at least two devices, each configured with a specific function to ensure efficient data transmission over long distances without the need for complex infrastructure. The network operates using a star topology, in which one device acts as the central node (Upstream) and the others act as peripheral nodes (Downstream). LoRaMod devices can be programmed to take on either of these two roles in the network.

The network operates using a star topology, in which one device acts as the central node (Upstream) and the others act as peripheral nodes (Downstream)

Upstream

A LoRaMod device configured to operate as the network’s central node, managing wireless links with up to 4 downstream devices and connecting directly to data loggers, PLCs, or SCADA systems via RS-485, linking wired and wireless networks without the need for additional gateways.

Downstream

A LoRaMod device configured to operate as a remote field or edge node, connecting Modbus sensors or actuators to the upstream via a secure point-to-point LoRa connection, extending control and monitoring to areas where wired connections would be impractical or costly.

LoRaMod Device Manager is the software used to set up and commission LoRaMod systems. Connecting via Bluetooth Low Energy (BLE), it allows users to configure each device as an Upstream or Downstream unit, pair devices within the network, and test LoRa communication on-site. The tool also enables the setup of the end-device map within the network, provides options to fine-tune communication parameters for each project, and includes the ability to activate the Modbus cache for faster and more efficient data handling.

Once powered, LoRaMod activates its BLE connection, through which it is possible to communicate with the device for configuration. Using a computer, tablet or mobile phone, with enebled Bluetooth connection, open the following web address in your browser: https://www.davecraftlab.com/loramod/4.8/config

Note: the browser must support Bluetooth web connection. We recommend the use of Chrome/Chromium 56 or higher, however, in the following link you can check the one that best suits your needs: https://caniuse.com/web-bluetooth

Scale Your Modbus Network with Full Control

Extend Modbus without altering your system architecture

Avoid costly and complex cable runs. Enable long-range wireless connections while preserving the original control architecture and system logic intact. LoRaMod extends the network transparently, keeping technical risk low and validation efforts minimal. For the controller, remote devices remain fully present — exactly as if they were physically connected.

Scale and organize your network with full control and simplicity

LoRaMod gives you the freedom to decouple the logical address space of your controller from the physical space in the field, so your PLC works with the IDs you define while your devices keep their original addresses. You can grow your network, manage retrofits smoothly, and bring legacy equipment on board — all without reprogramming. LoRaMod handles traffic translation and routing transparently.

Simplify the overall project infrastructure

LoRaMod gives you a self-contained solution that works entirely on its own — no cloud platforms, external gateways, or intermediate layers needed. A leaner architecture means you get greater reliability, full independence, and a more resilient system over time.

Real optimization of Modbus traffic over radio

LoRaMod optimizes wireless communication for industrial environments, giving you stable, predictable connectivity with low latency and consistent response times. You get built-in diagnostic tools for connectivity and network integrity that make your engineering and commissioning phases smoother and more efficient.

Real security without added complexity

LoRaMod brings advanced wireless traffic protection directly into your network, fully self-contained and ready to work from day one. Your communication network gains both compliance and robustness — with no additional infrastructure to deploy or external services to rely on.

Complies with regulations and coexists in shared spectrum

LoRaMod’s Polite Spectrum Access mechanism lets you operate confidently in sub-GHz ISM bands, fully aligned with regulatory frameworks. You get high-frequency industrial traffic with predictable, controlled behavior — even in shared spectrum environments.

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