Rhosigma provides HART protocol development and integration services for industrial field devices, smart transmitters, and process instrumentation. We support HART communication, device configuration, protocol implementation, and integration with existing industrial automation systems for reliable device-to-system communication.
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Every capability below is delivered by the same in-house team — firmware, hardware, and testing, with no handoff gaps.
Smart field devices with native HART communication built in from the schematic stage
HART 5, 6, and 7, and Wireless HART command layers integrated into your firmware code base.
Modem chipset selection, analog front-end tuning, and protocol-conversion gateway builds.
Modular embedded C/C++ firmware for command handling, sensing, and modem control.
Pre-certification testing against Field Comm Group requirements before formal submission.
Retrofit HART communication onto existing analog-only devices without a full redesign.
The protocol stack, hardware platforms, and test equipment our engineers use on every HART project.
HART device and gateway development for process, energy, and manufacturing clients — across India including Mumbai, Thane, Pune, Bangalore, and Delhi NCR.
Pressure and flow transmitters, HART gateways, and the development of hazardous area field devices for upstream/downstream processing.
Instrumentation for continuous/batch processes through the use of HART analytical instruments and control loop devices.
The communication of field devices to turbines, boilers, and grid-side monitoring instrumentation that needs diagnostics.
Quality, flow, and level monitoring transmitters using HART for diagnostics for process reliability in the treatment plant.
Instrumentation and gateway development in validated and traceable process environments.
Communication of hygienic field devices used for monitoring temperature, level, and flow on the production line.
General purpose communication of HART devices with industrial controllers and instrumentation products.
Gateway integration into HART networks within system-wide applications using digital diagnostics.
Rhosigma develops HART communication solutions for organizations operating in oil & gas, chemical processing, power, water treatment, pharmaceutical, and industrial automation sectors.
Logos shown represent the industries and organization types Rhosigma works with, for illustrative reference only, and do not imply an existing client, partnership, or endorsement.
A documented, repeatable process used on every HART engagement — so you always know where the project stands.
Documentation of device type, HART version, network topology, and certification targets before design begins.
Mapping of command set, modem choice, and the plan for integration of HART protocol stack on your MCU and hardware.
Design of modem circuitry, calibration of analog front-end, and PCB layout for clean FSK modulation.
Firmware written in Embedded C/C++ for command handling, sensor sampling, and modem control loop.
Testing of command level conformance to Universal, Common Practice, and Device Specific HART commands.
Testing before certification according to Field Comm Group requirements, including interoperability testing.
Field deployment support, DD file delivery, and firmware maintenance after product launch.
Delivering of all schematics, source code, test documents, and DD files — no secrets here.
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We design and develop smart field devices — transmitters, actuators, and sensors — with native HART communication built in from the schematic stage, not bolted on afterward.
Our experts integrate the HART protocol stack into your current or new device firmware. This includes the physical layer, data link layer and the commands set including Universal commands (U-), Common Practice commands (C-) and Device-Specific commands.
We choose an appropriate HART modem chipset and integrate it into your circuit design. We then configure and calibrate the analogue front-end for the best possible FSK signal performance and write the driving software.
We design gateways that can convert HART data to another communication protocol (Modbus, MQTT, OPC-UA, or connect to various cloud platforms). Our solution includes functionality for supporting multipoint or multi-device HART loops (using a multiplexer device).
Before submitting your device for official registration to the Field Comm Group, we thoroughly test it to ensure it adheres to the Universal, Common Practice, and Device-Specific commands as per the standards.
We create embedded C/C++ firmware that manages your device’s HART commands, sensor readings, and modem functioning within the constraints of your microcontroller’s memory resources. The firmware will be clearly documented and easy to expand.
We retrofit modem circuit and firmware to older, analog-only field instruments to bring them up to current technological standards. The well-tested measuring circuitry of the legacy devices remains untouched
Most vendors integrate a HART modem and call it done. We treat HART as a system-level problem — firmware, hardware, and testing as one package, from Thane, Maharashtra.
Engineers who have actually designed HART-compatible firmware rather than simply reading about it.
Practical experience with transmitters, actuators and gateways.
Practical knowledge of Field Comm command structures and protocol tests.
From protocol design to firmware to modem design – all done in-house.
Proven process and pre-built HART components mean less development time.
Pre-HART certification testing for your devices before you even apply for HART approval.
From single modem upgrade to multiple device product range.
Full IP ownership on schematics, source code and documentations.
Choose an engagement approach based on your HART communication requirements, device development stage, and integration needs. Our support can cover protocol implementation, device configuration, field-device integration, and testing.
Problem: HART 7 protocol capability on a strict components budget. Solution: incorporation of modem, command processing firmware, and in-house creation of DD files. Outcome: passed pre-certification testing during the first internal cycle.
Problem: interface between multi-bus HART field network and a pre-existing SCADA system. Solution: development of a gateway that performs HART-to-Modbus TCP conversion and multiplexes the data. Outcome: complete visibility of all field devices from the central SCADA during commissioning.
Problem: existing 4–20 mA devices required remote diagnostics, but not possible due to the lack of design revision. Solution: installation of HART modem logic circuitry and firmware modification. Outcome: remote diagnostics via HART without re-qualification.
A look at the types of HART communication and industrial instrumentation projects our engineering team can support.
Integration of HART-enabled field devices with industrial monitoring, control, and automation systems.
HART communication support for smart transmitters used in industrial process measurement and instrumentation.
Digital HART communication integrated with traditional 4–20mA instrumentation for configuration and device diagnostics.
Device configuration and communication support for HART-compatible instrumentation and industrial applications.
HART communication development is only one part of a successful industrial solution. We support the transition from protocol implementation and device configuration through testing, system integration, and deployment in the intended industrial environment.
HART communication functionality developed according to device and system requirements.
Configuration support for HART commands, parameters, diagnostics, and device communication.
Validate HART communication behavior and integration requirements before deployment.
Integrate HART-enabled devices with control, monitoring, and industrial automation systems.
Technical support during deployment and integration into the target industrial environment.
HART is an acronym for Highway Addressable Remote Transducer, a field communication protocol used to modulate a low-speed digital signal onto an existing 4–20 mA analog signal. The analog signal continues carrying the process value as always – while the digital signal carries diagnostics, configuration data and secondary process values without interfering with the loop. Because of its use of existing 4–20 mA wiring, HART allows for installation of diagnostics and remote configuration capabilities into field devices without the need for re-wiring, and this is the reason behind HART’s popularity as one of the most widely used field communication protocols in the process industries.
Questions we hear on every HART scoping call — answered directly, without the brochure language.
HART (Highway Addressable Remote Transducer) is an industrial standard that piggybacks a digital FSK signal onto the classic 4–20 mA analog current loop. This allows remote and intrinsically safe intelligent field devices to communicate diagnostic, secondary process data and calibration or configuration parameters, without disrupting the process value measurement - so adding HART to existing networks is simple and doesn’t necessitate re-wiring.
Rhosigma engineers utilize an integrated and cohesive workflow from protocol stack development to embedded firmware and from the HART modem circuit design to DD (Device Description) file Creation, all tested and verified to Field Comm Group requirements before certification. We have the expertise to facilitate end-to-end development with a single engineering group.
Absolutely! We design and program HART-compliant gateways enabling point-to-point and multi-drop communication between field devices and upper-level automation and IT systems, providing connectivity to Modbus, MQTT, OPC-UA, or even to cloud platforms. Gateways also support Multiplexers for networks containing multiple HART-compatible sensors on a single analog loop.
Basic HART protocol integration onto an existing analog loop device can take as little as six weeks to ten weeks. However, complete HART device development from concept into a smart device that includes all HART commands, a DD file and goes through pre-certification with Field Comm Group could take between three months to six months, depending on the system complexity and amount of validation required.
Yes. Rhosigma provides development services to implement the popular Wireless HART standard, the mesh networking embodiment of HART that excels in situations where routing new wires is simply not a viable option. Our expertise includes Wireless HART-compatible field devices and gateways.
The majority of our HART services are used by O&G (Oil & Gas), Chemical, power generation, water and wastewater plants, pharmaceutical, and food & beverage manufacturers; in addition, instrumentation manufacturers developing devices for these sectors rely on our engineering competence.
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Where innovation meets excellence in the world of electronic technology. Established with a passion for advancing the boundaries of what's possible.
info@rhosigma.in
602-B, Virani Business Center, Opp Bharat Gears Limited, Kausa Mumbra, Thane 400612.