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Rhosigma Engineering & Automation Pvt. Ltd. offers cutting-edge hardware development solutions, such as embedded system design, IoT devices development, PCB design, firmware integration, prototyping, and testing & validation. We develop reliable and efficient hardware products for our clients to help them launch their products much faster.
Convert your concepts into products through our total hardware development offerings. Our solutions include schematic design, PCB layout design, embedded systems development, FPGA and ASIC development, as well as prototype development and testing and certifications and manufacturing support. Our experience can help businesses design and develop high-quality electronic devices for applications ranging from industrial automation, automotive, healthcare, IoT, telecommunications, consumer electronics, and energy industries.
Advanced IIoT & HART Solutions Infographic illustrating the flawless integration of HART-capable devices, IoT gateways, cloud connectivity, field diagnostics, and business analytics. Ideal for industries seeking to enhance their processes through monitoring, predictive maintenance, and increased efficiency.
Why Software Testing Services Are Non-Negotiable in Modern Product Development
Every product that reaches a customer carries an implicit promise: that it will work. Not occasionally. Not mostly. Every time, under every expected condition. In a world where software powers everything from medical devices to factory automation, consumer electronics to financial infrastructure, the cost of failing to keep that promise is not just commercial — it can be catastrophic.
Software testing services are the discipline that stands between a product's potential and its promise. Yet for many organisations, especially those under pressure to deliver quickly, testing is treated as a phase to be compressed, a cost to be minimised, or a step to be deferred until after launch. This mindset is one of the most expensive mistakes a product company can make.
The True Cost of a Software Defect
Research in software engineering has consistently shown that the cost of fixing a defect grows exponentially with the stage at which it is discovered. A bug caught during the requirements phase costs a fraction of what the same bug costs if found during system testing — and a tiny fraction of what it costs if discovered in production, in the hands of customers.
Beyond direct remediation costs, production defects trigger a cascade of secondary costs: customer support volume, refund and return processing, reputational damage, regulatory scrutiny, and in safety-critical applications, potential liability. For embedded and IoT software in particular, over-the-air updates are not always possible, making pre-release defect detection a financial imperative.
What Professional Software Testing Services Actually Cover
Many teams conflate software testing with running a checklist of expected user interactions. Professional software testing services are far more comprehensive:
Functional Testing
Functional testing validates that every software function delivers the output specified in the requirements when given the correct input. It covers both positive testing (expected inputs producing expected outputs) and negative testing (unexpected or invalid inputs handled gracefully without crashes or data corruption). This is the foundation of any testing programme.
Software Integration Testing
Modern software rarely operates in isolation. APIs, third-party libraries, hardware drivers, cloud services, and databases must all interact reliably. Integration testing validates these interfaces, ensuring that modules developed independently work correctly together — a failure point that unit testing alone cannot address.
System-Level and End-to-End Testing
System-level testing validates the complete software stack in an environment that replicates real-world deployment conditions. For IoT and embedded systems, this includes testing software behaviour under hardware constraints — limited memory, low processing power, intermittent connectivity, and real sensor inputs — conditions that development environments typically mask.
Stress and Performance Testing
Software that works correctly under normal conditions may fail under peak load, degraded network conditions, or after extended operation. Stress testing pushes the system beyond its design limits to identify breaking points. Performance testing measures response time, throughput, and resource utilisation against defined benchmarks.
Security Testing
For connected software, security testing has moved from optional to essential. Penetration testing, vulnerability scanning, and code analysis identify exploitable weaknesses before adversaries do. Organisations deploying software in regulated industries — healthcare, finance, defence — face mandatory security testing requirements as a condition of certification.
The Case for Outsourcing Software Testing
Internal development teams are invested in their code. This is a strength during development and a weakness during testing. Cognitive bias causes developers to test scenarios they expect to pass, not the edge cases and failure modes they did not anticipate. Independent testing teams bring objectivity, diverse testing techniques, and specialised tooling that in-house teams rarely maintain at the same level.
Outsourcing software testing to specialist providers also allows organisations to scale testing effort to match product complexity without permanently expanding headcount. During intensive pre-release periods, additional testing capacity can be brought online; during steady-state maintenance, it can be scaled back. This flexibility is difficult to achieve with internal resources.
Quality Assurance is a Culture, Not a Phase
The most effective quality outcomes come not from treating testing as a final gate before release, but from embedding quality assurance thinking throughout the development lifecycle. This includes writing testable code, maintaining automated regression test suites, integrating testing into continuous integration pipelines, and reviewing requirements for testability before implementation begins.
Organisations that treat quality as a core engineering discipline — not an afterthought — consistently deliver products that perform better in the field, generate fewer support incidents, and command stronger customer loyalty. The investment in professional software testing services pays dividends that extend far beyond the cost of the service itself.
For organisations seeking a partner that combines software functional testing with hardware-level quality assurance, Rhosigma's testing and quality services offer a fully integrated approach — from design for testability through in-circuit testing, functional testing, environmental stress screening, and software validation — ensuring that your product performs flawlessly from first power-on to end of life. Explore Testing & Quality Services:
HART Protocol in IoT: Bridging Legacy Instrumentation and the Smart Connected World
The industrial world runs on instruments. Pressure transmitters, flow meters, temperature sensors, level gauges — thousands of them embedded in pipelines, reactors, turbines, and processing plants around the globe. The majority of these instruments were installed well before the era of Industrial IoT (IIoT), yet they contain more intelligence than many people realise. The key to unlocking that intelligence lies in a decades-old but remarkably relevant technology: the HART protocol.
What is the HART Protocol?
HART stands for Highway Addressable Remote Transducer. Developed in the 1980s and now governed by the FieldComm Group, HART is a hybrid communication protocol that simultaneously transmits two types of signals over the same pair of wires: a conventional 4-20 mA analog signal carrying the primary process variable, and a digital signal superimposed on it using Frequency Shift Keying (FSK) modulation.
The 4-20 mA signal is the standard that process industries have relied upon for decades. HART adds a digital channel on top of it, enabling bidirectional digital communication with smart instruments without replacing existing wiring or disrupting ongoing process operations. This makes HART uniquely practical for brownfield industrial environments where infrastructure replacement is costly and risky.
Why HART Remains Relevant in the IoT Era
One might assume that in the age of wireless sensors, cloud platforms, and real-time analytics, a protocol designed four decades ago would be obsolete. The opposite is true. HART's continued relevance stems from several compelling factors:
Installed Base: Over 40 million HART-enabled field instruments are currently deployed worldwide. These devices represent enormous capital investment and cannot be replaced overnight.
Backward Compatibility: HART devices continue to function on existing 4-20 mA infrastructure, meaning no rewiring is required for IoT integration.
Rich Device Data: HART instruments contain far more data than the single process variable transmitted via the 4-20 mA signal — including device diagnostics, secondary variables, device configuration, and calibration data. IoT integration makes this data accessible.
Reliability: In environments where safety and uptime are paramount, HART's proven reliability in harsh industrial conditions is a significant advantage over newer wireless protocols.
How HART Integrates with IoT Architectures
HART-to-IoT Gateways
The most common integration approach involves deploying HART-to-IoT gateways that read digital data from HART instruments and forward it to cloud platforms or edge computing systems via standard IoT protocols such as MQTT, OPC-UA, or REST APIs. These gateways act as translators, converting HART's FSK digital data into formats that modern IoT platforms can consume. A single gateway can communicate with multiple HART instruments on the same loop through the HART multi-drop configuration.
WirelessHART
The FieldComm Group extended the HART protocol to the wireless domain with WirelessHART (IEC 62591), a mesh network standard operating in the 2.4 GHz ISM band. WirelessHART enables new wireless instruments to be deployed without wiring while remaining fully compatible with the HART command set. In IoT architectures, WirelessHART networks can be connected to cloud platforms via network managers and gateways, creating a seamless path from field instruments to enterprise analytics systems.
Edge Computing with HART Data
Modern IoT deployments increasingly process HART data at the edge — performing local analysis, anomaly detection, and control decisions without relying on round-trip communication to a cloud server. Edge computing devices equipped with HART communication interfaces can monitor instrument health, detect calibration drift, predict valve failure, and trigger maintenance alerts in real time, dramatically reducing unplanned downtime.
Industrial IoT Use Cases Enabled by HART
Predictive Maintenance: HART diagnostic data — such as sensor noise, process variable deviation, and device temperature — feeds predictive maintenance algorithms that forecast instrument failure before it occurs.
Remote Calibration and Configuration: Technicians can adjust instrument range, damping, and engineering units remotely via the HART digital channel, reducing the need for site visits.
Asset Management: HART device identification data (manufacturer, model, serial number, firmware revision) enables comprehensive digital asset registries that simplify compliance and maintenance planning.
Process Optimisation: Secondary variables — such as the sensor temperature of a pressure transmitter, or the uncompensated flow of a Coriolis meter — provide additional process insight that supports optimisation of energy use and yield.
HART Implementation: What it Takes
Implementing HART communication in an IoT system requires expertise in both the HART protocol specification and IoT system architecture. Hardware design must account for the FSK modem circuitry that demodulates the 20-odd milliamp superimposed signal. Firmware must implement the HART command set, including universal commands (supported by all HART devices), common practice commands, and device-specific commands. And the IoT platform layer must be able to interpret and act on HART device data in the context of the broader operational intelligence strategy.
Specialist engineering firms with deep experience in industrial instrumentation and IoT system integration — such as Rhosigma Engineering, which offers dedicated HART and IoT services — provide the technical depth required to design, implement, and deploy HART-integrated IoT solutions effectively. Their combined expertise in hardware design, firmware development, and cloud connectivity ensures that HART data flows reliably from field to decision-maker. explore more solution
Explore the complete IoT hardware design lifecycle, from concept development and system architecture to PCB design, firmware integration, prototyping, and production support. This infographic highlights how IoT hardware enables seamless connectivity, real-time data collection, cloud integration, and intelligent device management. Learn how robust IoT solutions help businesses create reliable, energy-efficient, and scalable connected products for industrial, healthcare, agriculture, asset tracking, and smart automation applications.
IoT Hardware Design Services – Smart, Secure & Scalable Solutions by Rhosigma
Explore advanced IoT Hardware Design Services with RhoSigma, delivering reliable, secure, and scalable connected device solutions for modern industries. This infographic highlights key IoT hardware capabilities including hardware conceptualization, PCB design, prototyping, firmware integration, testing, and industrial-grade product development. Learn about the end-to-end design process that transforms ideas into intelligent IoT products with seamless connectivity, automation, and real-time monitoring.
Teksun Inc is a Product Design & Development Company specializing in digital transformation and connected IoT and AI solutions across the in
Teksun Inc is a leading Next Generation IoT and AI turn-key Product Engineering Services provider. Teksun is an ISO 9001:2015 certified company headquartered in Silicon Valley, California To know more about browse: https://teksun.com/ Contact us ID: [email protected]
