AI-Powered Oxygen Therapy
Intelligent FiO2 Titration System for Critical Care
- Class B Firmware Design
- IEC 62304
- Oxygen Savings
- 35%
- Design target
- Response Time
- < 30 sec
- Design target
Core hardware
Embedded C/C++ firmware for connected and real-time products, from board bring-up, BSPs and device drivers to bare-metal or RTOS applications, secure boot, OTA updates and embedded Linux. You receive maintainable source code, build instructions, interfaces and test documentation for long-term ownership.
Every project is quoted as a fixed-scope proposal within 3–5 business days of a discovery call. Discuss your product
AI-Powered Oxygen Therapy
Intelligent FiO2 Titration System for Critical Care
Specifications
Capabilities
Expertly crafted firmware using modern C/C++ practices, optimized for performance, reliability, and maintainability across ARM Cortex-M, RISC-V, and other microcontroller architectures.
RTOS integration with FreeRTOS, Zephyr, Eclipse ThreadX and commercial kernels such as embOS, with optimized task scheduling, resource management, and real-time performance.
Custom development and optimization of wireless protocol stacks for BLE, Wi-Fi, LoRaWAN, Sub-GHz, and proprietary RF communications with robust error handling and connection management.
Tamper-resistant bootloader implementation with secure firmware update mechanisms, cryptographic signature verification, and failsafe recovery for mission-critical systems.
Specialized firmware techniques that dramatically extend battery life through advanced power state management, peripheral optimization, and intelligent wake-up strategies for battery-powered devices.
Custom driver development for sensors, peripherals, communication interfaces, and custom hardware, with comprehensive documentation and test suites for long-term maintainability.
Advanced analysis and optimization of execution time, memory usage, and interrupt latency, ensuring your firmware meets strict timing requirements and resource constraints.
Sophisticated debugging methodologies using logic analyzers, JTAG/SWD debuggers, and custom diagnostics to rapidly identify and resolve complex firmware issues in development and field deployment.
Implementation of automated testing, continuous integration, and deployment pipelines specifically tailored for embedded firmware development to ensure code quality and reliability.
Process
Establish a reproducible build and an agreed description of device behaviour on the target board.
Deliverable: Build instructions and requirements
Choose bare metal, RTOS or embedded Linux against the workload, memory, driver support, update needs and timing.
Deliverable: Firmware architecture
Drivers, protocols and application logic, including secure boot and OTA with recovery after a failed update.
Deliverable: Source and configuration under version control
Measure timing, memory and power on the target hardware; run driver, protocol and interrupted-update regression tests.
Deliverable: Test results on the target hardware
Document dependencies, open defects and maintenance responsibilities.
Deliverable: Reproducible source, configuration and binary handoff
Engineering notes
Embedded firmware work should start with a reproducible build and an agreed description of device behavior. New development, a firmware rescue and an embedded Linux BSP port have different dependencies. Define the target board, software baseline and acceptance tests before committing to a release date.
Choose against the workload, available memory, driver support, update needs and timing constraints. An RTOS provides scheduling mechanisms; installing one does not guarantee application deadlines. Measure interrupt latency, blocking and task execution under the expected load. For Linux work, scope the bootloader, kernel, device tree, drivers and reproducible image build.
Zephyr: scheduling and deadline API limitsSigned firmware and secure boot help control which code is accepted. Define key ownership, update authorization, version policy and recovery after a failed or interrupted update. These controls do not eliminate every runtime vulnerability; validation should cover failure paths as well as a successful update.
NIST: protect, detect and recover firmwareStart with source access, toolchain versions, dependency licenses, programming instructions and a known working board. Reproduce the reported faults before changing the architecture. A takeover assessment should identify what can be retained, what must be repaired and which hardware or missing documentation blocks testing.
Planning
Start with a non-confidential summary of your product and the milestone you need to reach next.
Define the hardware, required behavior, and release criteria before estimating firmware development. For an existing product, describe what works today and what needs to change.
Specify a reproducible build, source and configuration handoff, interface documentation, and tests for the agreed behaviors. Identify which hardware and integration dependencies must be available before validation can finish.
Agree confidentiality arrangements before sharing proprietary design files.
Compare RTOS ecosystem, tooling and integration considerations for an embedded firmware project.
Warning signs, the files to demand from a previous vendor, how a design audit works, EMC and field-failure triage, and typical audit cost.
Each platform page covers the part families, toolchain and design trade-offs for that silicon.
STM32Cube/HAL or bare-metal firmware across ultra-low-power, high-performance and wireless STM32 parts.
ESP-IDF firmware for Wi-Fi and Bluetooth products, including OTA, security and module-level certification.
NRF Connect SDK and Zephyr firmware for Bluetooth LE and cellular IoT products with GNSS.
Proof
AI-Powered Oxygen Therapy
Medical equipment manufacturer, India
Smart IV Infusion Pump
Medical-device company, India
Hotel Call-Button System
Hospitality client, Oman
Industrial IoT
Steel manufacturer, India (3 plants)
Smart Agriculture
Agricultural cooperative, Maharashtra, India
Edge AI Robotics
E-commerce logistics provider
Connected Fleet
Logistics and transportation company
Smart Police Wearable
State police department, India
Medical Wearable
US-based digital health startup
RISC-V AI Accelerator
Consumer electronics semiconductor company
Battery-Free IoT
Public infrastructure authority
Multi-Connectivity Pet Tracker
European pet technology company
Smart Urinometer
Medical device manufacturer, India
Automated Nitric Oxide Therapy System
Medical equipment manufacturer, India
Oral Screening Camera Probe
Medical-device client, India
BLE Beacon RTLS
Asset-tracking client, Dubai, UAE
UWB Asset Tracker
Warehouse-technology company, Bangalore, India
Neonatal Vitals Wearable
Medical-device client, India
ToF Tank Level Monitor
Industrial client, India
mmWave People-Counting Sensor
Smart-building and retail client, Dubai, UAE
FAQ
We primarily develop firmware in C and C++ for embedded systems, optimized for performance and memory efficiency. We also work with Rust for safety-critical applications, Python for rapid prototyping and testing tools, and assembly language for performance-critical routines. Our code follows MISRA C guidelines for automotive and industrial applications.
We have extensive experience with FreeRTOS, Zephyr RTOS, Eclipse ThreadX, Micrium µC/OS, embOS, and VxWorks. We also develop bare-metal firmware. The choice depends on concurrency, timing deadlines and memory limits; both bare-metal and RTOS designs require timing validation against the product requirements. Our RTOS implementations include task scheduling optimization, inter-task communication, memory management, and real-time performance analysis.
Power optimization is achieved through multiple techniques: implementing ultra-low power sleep modes with wake-on-interrupt, optimizing peripheral usage and duty cycles, using DMA for zero-CPU data transfers, implementing adaptive algorithms based on battery level, and profiling power consumption at every development stage. Savings depend on the baseline, so we report measured current profiles before and after optimisation on the target board.
Security is integrated at every layer: secure bootloader with signature verification, encrypted firmware updates (OTA), hardware security modules (HSM) integration, secure key storage, encrypted communication (TLS 1.3), runtime integrity checks, and anti-tamper protection. We follow OWASP IoT guidelines and can implement industry-specific security standards like IEC 62443.
We implement robust OTA (Over-The-Air) update mechanisms with delta updates to minimize bandwidth, A/B partition schemes for failsafe rollback, cryptographic signature verification, version management and rollback capabilities, and update scheduling for minimal disruption. Our OTA designs are built for staged fleet-wide rollouts, with cohorts, progress reporting and rollback.
Comprehensive testing includes unit testing with frameworks like Unity and CppUTest, integration testing with hardware-in-the-loop (HIL) systems, automated regression testing in CI/CD pipelines, code coverage analysis (targeting 80%+ coverage), static analysis with tools like PC-lint and Coverity, and stress testing under extreme conditions. We also perform power profiling and real-time performance validation.
We implement multi-stage bootloaders that verify firmware integrity and authenticity at each stage using cryptographic signatures with hardware-backed key storage in secure elements or OTP fuses, ensuring that only authorized firmware images can execute on the device. The boot chain supports A/B partition schemes for rollback protection, encrypted firmware images for IP protection, and secure key provisioning workflows for manufacturing line programming.
We build firmware with structured logging, fault capture, and core dump capabilities that store diagnostic data to non-volatile memory when a crash or assertion failure occurs, which can be retrieved remotely via OTA or through a diagnostic interface during service visits. For harder-to-reproduce issues, we enable runtime tracing modules that capture event sequences, timing data, and peripheral register snapshots with minimal performance overhead.
We use current measurement tools like the Nordic Power Profiler Kit, Otii Arc, or Keysight N6705C to capture detailed power profiles correlated with firmware execution states, identifying which code paths and peripheral configurations consume the most energy. Optimization techniques include aggressive clock gating, peripheral duty cycling, DMA-based transfers to keep the CPU in sleep modes longer, and tick-less idle scheduling to eliminate unnecessary wake-ups.
We architect multi-core firmware with clearly partitioned responsibilities, dedicating one core to real-time control loops and the other to communication stacks and application logic, using inter-processor communication mechanisms like shared memory with hardware semaphores or mailbox peripherals. Careful resource partitioning of flash, RAM, and peripherals is defined in linker scripts, with synchronization primitives designed to avoid priority inversion and deadlocks.
We develop device drivers following a layered architecture with a clean separation between register-level access, driver logic, and the application-facing API, making drivers independently testable and reusable across projects. Each driver includes proper initialization sequencing, comprehensive error handling with timeout protection, interrupt-safe data paths using ring buffers or DMA descriptors, and thorough documentation of hardware errata workarounds.
We implement semantic versioning embedded directly in the firmware binary metadata, with version strings, build timestamps, and Git commit hashes compiled into a dedicated read-only section that can be queried at runtime or extracted from binary images for traceability. Our release process includes tagged release branches, automated regression testing against a hardware test matrix, and staged rollouts starting with internal QA devices before field deployment.
Firmware development is the process of creating low-level software that directly controls embedded hardware. Firmware typically runs on microcontrollers or SoCs, managing peripherals, communication protocols, and application logic. Modern firmware development follows practices like MISRA C coding standards, RTOS integration, and CI/CD testing pipelines.
Source: Industry definition. Related terms: RTOS, device drivers, bootloader, HAL.
Each project is quoted as a fixed-scope proposal: a statement of work with milestones, deliverables and pricing, sent within 3–5 business days of the discovery call. The price depends on the requirements, how mature the design is, technical complexity, the number of prototype iterations and the validation scope. Longer engagements can also run as a retainer or a hybrid of both. For budgeting before you contact us, our hardware development cost benchmarks and the PCB design, firmware and IoT cost guides give indicative ranges with their assumptions stated. They are planning ranges, not quotes.
It depends on the scope and on what already exists when we start. As planning ranges from our cost benchmarks: a single PCB layout takes 2–6 weeks per board and embedded firmware 4–16 weeks. A connected (IoT) product takes 3–12 months from concept to a production-ready design, and a regulated medical device 12–24 months to a 510(k) submission-ready package; from idea to mass production, a typical connected product takes 9–18 months. The proposal sets out a dated milestone plan, and you receive weekly progress updates during the project.
You do. Our contracts assign the intellectual property in the project work product (schematics, PCB design files, firmware source code and documentation) to you on payment, and we hand over the source files, not only fabrication outputs or compiled binaries. The exact terms are set out in the signed agreement for each engagement.
Yes. We sign a mutual NDA before any technical discussion of your project. Send your standard NDA or use ours; we return it signed within one business day.
Yes. We are based in Hyderabad, India, and work with product teams in India, the United States, the United Kingdom, Germany, Japan, Australia, the Middle East and other markets. Our office hours are 10:30–19:00 India Standard Time (UTC+5:30), Monday to Saturday, and we schedule design reviews across time zones, typically from US Pacific to Central European time. Japan is 3.5 hours ahead of India, so our first four hours overlap the Japanese afternoon. Prototypes and documentation ship by international courier such as DHL or FedEx. Our hardware outsourcing guide covers what to agree before an international project starts.
Yes. We prepare the manufacturing release package — fabrication and assembly drawings, the BOM with approved manufacturers, programming files and test specifications — and hand it over to the contract manufacturer (EMS) you choose. If you have not chosen one, we help you evaluate candidates through technical capability assessments and a pilot build. See manufacturing support.
No. Rapid Circuitry does not hold ISO 9001, ISO 13485 or other certificates. Our processes are aligned with ISO 9001:2015, and we design products to the requirements of the standards that apply to them — for example IEC 60601-1 and IEC 62304 for medical devices (with design documentation structured so your ISO 13485 quality system can absorb it) and IEC 61000 for EMC — and we specify IPC-A-610 workmanship classes for assembly. We prepare the product and its documentation for certification testing at accredited laboratories; the certificate or approval is issued for your product by the laboratory, notified body or regulator.
A short, non-confidential description of the product and what it must do (sensors, connectivity, on-device processing), the target production volume and unit cost, the markets and regulations it must meet (for example FDA, CE or FCC), your timeline, and what already exists: a concept, a proof of concept, schematics, PCB files or firmware. After the NDA, the next step is a 30-minute discovery call with the engineers who would work on the project, followed by the fixed-scope proposal. Send a project brief to begin.
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