Firmware That Runs in the Field, Not Just the Lab
We write embedded software that survives years of unattended operation — RTOS firmware, device drivers, IoT middleware, and secure OTA pipelines, all in production-grade C and C++. Not prototype code that holds up in the debugger and fails six months after the first shipment to a customer's site.
The firmware works on the bench.
It fails six months after shipment.
The hardest embedded failures are the ones that only appear under real operating conditions — temperature swings, electrical noise, intermittent power, memory fragmentation after weeks of uptime, and race conditions that only surface at one specific interrupt timing. Demo-quality firmware gets you through a prototype review. It does not get your product through its first year in the field.
Race conditions invisible in the debugger
Interrupt priorities not analysed. Shared resources with no mutex. Task stack sizes guessed rather than measured. The bug appears at 3am on a live device, not during the code review.
Battery life 40% below spec
sleep() called in a loop. Peripheral power rails never gated. DMA not used where it should be. The product that passed the power bench test uses 2x the current in the real application.
OTA updates that brick devices
Single-bank update with no rollback. No cryptographic verification of the image. No integrity check before the jump to the new firmware. One bad update bricks the entire deployed fleet.
What You Actually Receive
No vague deliverables. Here's exactly what lands in your hands.
Production firmware in your repo
Full source code in your version control from day one. Doxygen-level inline documentation. A reproducible build pipeline so any engineer can regenerate the binary without phoning us.
Secure boot and OTA pipeline
Dual-bank atomic updates, cryptographic signature verification, rollback on validation failure. Your fleet updates silently and safely without a field engineer visit.
Tested on your hardware, not emulated
Every module validated on-target with a logic analyser and oscilloscope. Stress tests at temperature extremes. Fault injection for power loss and communication errors. We find the field failure on the bench.
Architecture documentation you can maintain
Task map, interrupt priority table, memory layout, peripheral driver spec. The next engineer who picks up this firmware understands it in a day — not after a month of reverse engineering.
A Senior Embedded Engineering Team
Shipping reliable embedded software needs more than one firmware developer. Six roles on every Pillai Infotech embedded build.
Senior Firmware Engineer
C and C++ expert with datasheet-level experience. Writes drivers from the register up, not from example code. Our embedded developers own the architecture — they do not just fill in the gaps.
Hardware Bring-Up Specialist
Clock tree, power sequencing, GPIO, and minimum viable peripheral validation before a single application task is written. The person who makes your custom silicon actually run.
Connectivity and Protocol Engineer
MQTT, CoAP, BLE, LTE-M, LoRaWAN, Modbus, CAN. Builds the stack that reliably moves your data from the device to the cloud on a noisy factory floor or in a basement with intermittent signal.
Embedded Security Engineer
Secure bootloader, encrypted flash, cryptographic OTA verification, anti-tamper measures. Prepares the documentation trail that certification pre-audits require.
Hardware-in-the-Loop QA
Automated test harnesses on real hardware. Stress tests. Fault injection. Current profiling with a power analyser. Finds the failure mode that only appears after 96 hours of continuous operation.
Power Optimisation Specialist
Profiles every peripheral, designs tickless idle modes, gates power rails, and validates battery life projections against real current measurements — not datasheet calculations.
You See Everything. In Real Time.
Every Pillai Infotech project comes with a dedicated client dashboard. Kanban boards, live logs, test results, meeting notes — it's all visible the moment it happens. No status-report theatre, no "we'll get back to you", no surprises at the demo. You work with us like you work with your own team.
Kanban Board, Live
Every epic, every story, every task — visible on your dashboard. Drag, comment, reprioritize. It's the same board our team works from.
Documented Everything
Every decision, spec, API contract, and architecture diagram lives in the dashboard. Searchable, versioned, linked to the tasks they shaped.
Live Logs & Test Results
Build logs, deployment logs, test suite results — streamed to your dashboard the moment they run. You never have to ask "did the build pass?"
Meetings → Tasks, Automatically
Every meeting is recorded, transcribed, and every action point is auto-converted into a tracked task assigned to the right person. Nothing gets lost between calls.
Sprint Burndown & Velocity
See exactly how much work is done, how much remains, and our velocity over time. If a sprint is slipping, you see it the same moment we do.
Comment, Approve, Decide — In-Place
Comment on any task, approve designs, sign off on specs, and raise blockers directly in the dashboard. Everything tied to the work, not buried in email threads.
Embedded Systems We Have Shipped to Production
We match the architecture to the hardware constraints and the operational environment — not to what we are most comfortable building.
🏭 Industrial IoT edge nodes
Modbus and CAN gateways, predictive maintenance sensor nodes, and factory floor data concentrators. Designed for 24/7 operation in electrically noisy environments, not lab conditions. We pair <a href="/services/custom-software-development" style="color:#00CFFF;text-decoration:none;">custom software development</a> for the cloud backend and dashboard.
⌚ BLE wearables and consumer IoT
Battery-powered devices with BLE 5.x, sub-10uA deep sleep current, and secure OTA pipelines. Power budget defined at the architecture stage — not discovered as a problem after the first production run.
🌱 LoRaWAN environmental monitoring
Solar-powered, battery-backed remote sensor nodes deployed for years without maintenance. Designed for intermittent network connectivity, data integrity under packet loss, and multi-year battery life on a single cell.
🏥 Medical-adjacent monitoring devices
Patient monitoring and diagnostic equipment firmware with the documentation depth, version control rigour, and traceability that IEC 62304 pre-certification audits require. We prepare — we do not certify.
🔐 Secure IoT gateways
Edge gateways with TLS client certificates, hardware security modules (HSM), tamper-evident enclosures, and remote attestation. For applications where a compromised device is a safety and liability issue, not just an inconvenience.
🚗 Automotive-adjacent control units
CAN-FD based embedded control modules, AUTOSAR-adjacent BSPs, and MISRA C compliant firmware for vehicle systems that are not in a certified safety domain but operate in a regulated supply chain.
The Embedded Stack We Use
Production-proven tools. No hobbyist kits. Hireable skills so your next team can maintain what we deliver.
Languages
RTOS and Frameworks
Hardware Platforms
Connectivity
A Six-Stage Embedded Delivery Process
Built around the reality that a bug found in the field costs ten times more to fix than one found on the bench.
Hardware Review and Requirements
We review your schematic, datasheet, and memory map. We define timing budgets, power budgets, interrupt priority maps, and communication protocol specifications before writing a single line of firmware. Ambiguities at this stage cost nothing to resolve — they cost production delays later.
Architecture and RTOS Selection
We select the RTOS (or bare-metal approach), define the task architecture, design the memory layout, and specify the build system. This decision is documented in writing with trade-offs — not chosen on habit. You approve the architecture before the first commit.
Hardware Bring-Up and BSP
Clock tree, GPIO, power sequencing, and minimum viable peripheral validation. Every peripheral is verified against its datasheet with a logic analyser before we build higher layers. Shaky foundations here produce mysterious field failures at month six.
Firmware Development in Vertical Slices
We deliver complete working firmware features in two-week increments — a complete driver, a complete task, a complete protocol integration. You see progress on real hardware, not a monolithic handover after four months of coding.
Hardware-in-the-Loop Testing
Every module tested on target hardware with automated test harnesses where possible. Stress tests at temperature extremes. Fault injection for power loss and communication errors. OTA update rollback validation. We find the field failure on the bench.
Handover and Documentation
Full source code in your version control. Doxygen-level inline documentation. Build instructions so a new engineer can reproduce the binary without calling us. 60-day warranty. Optional retainer for ongoing maintenance as your hardware evolves.
Three Ways to Engage
Embedded projects come in different shapes — a single driver, a full firmware stack, or an ongoing product programme. Pick the model that fits your stage.
Embedded Scoping Sprint
Two-week engagement to review your hardware, define the firmware architecture, and produce a real written estimate you can take to your board.
- Hardware review + architecture decision
- Risk identification written report
- Honest fixed-price build estimate
Fixed-Scope Firmware Build
End-to-end delivery from schematic review to production-validated firmware, with full documentation, OTA pipeline, and post-delivery warranty.
- Fixed scope, fixed price
- Typical: 8–20 weeks
- 60-day post-delivery warranty
Embedded Engineering Retainer
A dedicated embedded team working alongside your hardware team on a continuous programme — new chip bring-up, feature additions, certification support.
- Senior firmware + QA engineers
- Monthly retainer, scale up/down
- Best for: ongoing hardware programme
Honest Answers to Embedded Systems Questions
The questions every smart buyer asks before signing. Here's what we tell them.
What embedded systems development services does Pillai Infotech provide?
We provide end-to-end embedded software development: firmware in C and C++, RTOS porting and customisation (FreeRTOS, Zephyr, ThreadX), device driver development, IoT connectivity stacks (MQTT, BLE, LTE-M, LoRaWAN), bootloader development, secure OTA pipelines, and hardware bring-up for ARM Cortex, RISC-V, and custom SoC platforms.
Can you develop firmware for our custom hardware platform?
Yes. We work from your schematic and datasheet — we do not require an off-the-shelf development kit. We perform hardware bring-up, develop BSPs, write peripheral drivers from the register level, and integrate your RTOS and application layer. Send us a schematic and a brief and we will produce an initial bring-up plan within a week.
How much does embedded software development cost in India?
Embedded software development from India typically costs 40–60% less than equivalent US or European teams. A focused firmware module starts around $8,000–$20,000. A full IoT device firmware stack with RTOS, OTA, and cloud connectivity typically runs $30,000–$80,000. We scope in week one and give you a written fixed-price estimate before you commit.
What RTOS platforms do you support?
We have production experience with FreeRTOS, Zephyr RTOS, ThreadX (Azure RTOS), Mbed OS, and bare-metal designs for ultra-low-latency or ultra-low-power applications. We select based on your timing requirements, memory footprint, licensing constraints, and long-term support roadmap.
Do you handle both the device firmware and the IoT cloud backend?
Yes. We provide full-stack IoT development — device firmware, IoT gateway middleware, cloud backend (AWS IoT, Azure IoT Hub, or a custom MQTT broker), and management dashboard. One team rather than three. Our custom software development team handles the cloud platform layer.
Do you follow MISRA C guidelines?
We can apply MISRA C 2012 guidelines for projects that require it — automotive-adjacent systems, industrial safety systems, and medical-adjacent applications where a certification pre-audit demands it. For projects without a certification requirement we apply equivalent rigour without the paperwork overhead.
How do you handle NDA and IP ownership?
NDA before the first call. All source code, documentation, and design artefacts are transferred to you in full on project completion — no retained licences, no royalties, no lock-in. The firmware is yours to maintain, modify, or hand to another team.