IoT Firmware Development
End-to-end IoT firmware on ESP32, STM32, and ATSAM microcontrollers. We write firmware that runs in production — not just demos. MQTT over TLS, secure boot, OTA firmware updates, and low-power wireless design for battery-operated devices.
MQTT over TLS
Secure broker communication with certificate-based authentication for all cloud-connected devices.
OTA Firmware Updates
Remote firmware upgrades without physical access — rollback support and update verification built in.
Low-Power Design
Deep sleep scheduling, wake-on-interrupt logic, and power profiling for battery-operated IoT nodes.
FreeRTOS Multitasking
Task scheduling, queues, semaphores, and interrupt service routines for reliable concurrent operation.
Industrial Automation & Modbus
Modbus RTU and Modbus TCP firmware for industrial sensors, VFDs, PLCs, and energy meters over RS-485. FreeRTOS multitasking with concurrent Modbus polling, PID control loops, and cloud data publishing. Built for 24/7 uptime.
Modbus RTU / TCP
Multi-slave RS-485 networks with master polling, exception handling, and data aggregation.
PID Control Loops
Precision closed-loop control for HVAC, motor drives, and process automation systems.
Alarm Management
Real-time threshold monitoring with push alerts, logging, and escalation workflows.
Cloud Publishing
Aggregated field data pushed to AWS IoT Core, Azure IoT Hub, or EMQX for dashboarding and analytics.
Cloud-Connected Embedded Systems
Full IoT pipeline: device firmware → MQTT broker → AWS IoT Core / Azure IoT Hub → time-series database → Grafana or custom dashboard. Experience with EMQX, Mosquitto, Firebase, and Docker-based deployments on Raspberry Pi.
Full IoT Pipeline
Firmware to dashboard in one scope — device data, broker, cloud ingestion, storage, and visualization.
Time-Series Storage
InfluxDB, TimescaleDB, or Firebase Realtime DB for high-frequency sensor data with historical queries.
Grafana Dashboards
Real-time monitoring panels, threshold alerts, and multi-device fleet views.
Docker Deployments
Containerized MQTT brokers and backend services on Raspberry Pi or cloud VMs for self-hosted solutions.
BLE & Wi-Fi Device Development
Bluetooth Low Energy firmware for sensor devices, wearables, and gateways. Custom BLE GATT profiles, DFU over BLE, Wi-Fi provisioning, WPA2 enterprise, and mesh networking on ESP32.
Custom GATT Profiles
Bespoke BLE services and characteristics for sensor data, device control, and configuration.
DFU over BLE
Firmware updates delivered wirelessly via Bluetooth — Nordic DFU compatible.
Wi-Fi Provisioning
Smartphone-based network configuration for production devices — zero hard-coded credentials.
ESP-MESH Networking
Self-healing wireless mesh networks for large-area sensor deployments with single gateway uplink.
Flutter Mobile Apps for IoT
Cross-platform iOS and Android apps that connect to your hardware via BLE, MQTT, or REST API. Real-time sensor dashboards, device configuration screens, push alerts, and OTA trigger from mobile.
Real-Time Dashboards
Live sensor gauges, charts, and device status panels updated via MQTT or BLE notifications.
Device Configuration
In-app settings screens to configure thresholds, sampling rates, and network parameters wirelessly.
OTA Trigger
Initiate firmware updates from the mobile app with progress tracking and error recovery.
iOS & Android
One codebase, both platforms — deployed to App Store and Play Store from a single Flutter project.
Full-Stack Web Development
Secure, scalable web applications and enterprise APIs using .NET Core, React.js, Django, and Flask. Microservices, JWT auth, Azure AD integration, CI/CD pipelines, and Docker deployments.
REST API Design
Clean, versioned APIs with Swagger docs, rate limiting, JWT/OAuth2 auth, and comprehensive error handling.
React Dashboards
Interactive SaaS dashboards with real-time data, charts, user management, and role-based access control.
Microservices
Decoupled .NET or Python services communicating via Azure Service Bus or REST — containerized with Docker.
Database Design
Efficient schema design, indexing, query optimization, and migrations for SQL Server and PostgreSQL.
PCB Design & Prototyping
Schematic capture and PCB layout in KiCad, EasyEDA, and Altium Designer. ESP32 and STM32 custom boards, power supply design, EMC considerations, and Gerber files ready for manufacture.
Schematic Capture
Clean schematics with proper hierarchy, annotation, and BOM generation for hand-off to manufacturing.
PCB Layout
Multi-layer layouts with controlled impedance traces, pour management, and silkscreen documentation.
Power Supply Design
LDO and switching regulators, battery management ICs, and USB-C power delivery circuits.
DFM Review
Design-for-manufacture checks before Gerber export — trace widths, via sizes, clearances, and panelization.
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