SYSTEMS ARCHITECTURE & FIRMWARE

Zephyr RTOS & Low-Power
IoT Engineering for Production Devices

Specialized in BLE, Wirepas Mesh, ultra-low power firmware, and Flutter IoT apps. We turn complex requirements into robust embedded solutions.

memory Zephyr RTOS bluetooth BLE 5.x hub Wirepas Mesh battery_charging_full Low Power smartphone Flutter
Discuss Your Project arrow_forward View Case Studies

Verifiable Track Record

8 PRs Merged into Zephyr RTOS Upstream contributor ↗
FCC Certified medical wearable Shipped to production
5+ yrs Battery life on a beacon tracker Wirepas mesh product line
4.9 / 5 Across 20 client reviews Verify on Freelancer ↗

Named Clients

Croxel Inc USA
CargoBeacon SE
GoGoPowerJuice USA
Sunvis IN

Medical, rail, marine, security and industrial clients are covered by NDA and stay anonymous — see the case studies for what was delivered.

Deep-Tech Engineering Expertise

We bridge the gap between hardware constraints and software flexibility, delivering firmware that is efficient, secure, and scalable.

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Embedded Firmware

Bare-metal and RTOS-based development for Nordic nRF, STM32, and ESP32. Creating reliable HALs and drivers.

  • C / C++ / Rust
  • FreeRTOS & Zephyr
  • Bootloaders & OTA
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Wireless Connectivity

Expertise in ultra-low power mesh networks and point-to-point communication protocols for industrial IoT.

  • Wirepas Massive Mesh
  • Bluetooth Low Energy
  • OpenThread & Matter
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Mobile & Cloud

End-to-end IoT system integration. Custom mobile apps for device provisioning and cloud dashboards.

  • Flutter · .NET MAUI
  • MQTT · CoAP · LoRaWAN
  • ThingsBoard · GitHub Actions
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PCB_REV_2.4
BIII_MODULE
POWER_OPT
CONN_STABLE
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Production Ready

Test-driven firmware: ztest & Twister, automated HIL, CI/CD releases.

Methodology

Kaizen for Perfection

We don't just write code; we engineer systems. Our approach is rooted in continuous improvement, ensuring that every byte of memory and every microamp of power is justified.

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Detailed Architecture

Comprehensive system diagrams and API specifications before a single line of code is written.

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Rigorous Testing

Automated unit testing, hardware-in-the-loop (HIL) testing, and long-duration stability runs.

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Performance Tuning

Deep analysis of power consumption and execution time to maximize battery life and responsiveness.

What Our Clients Say

Named endorsements used with permission, plus public reviews you can read in full.

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"BIII TECH's expertise with Zephyr RTOS and advanced Nordic chips was crucial. Their rigorous testing made our firmware production-ready."
AG
Albert Garvett
CEO, Croxel Inc (US)
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"From Wirepas mesh to ultra-low power asset trackers, they delivered on every front. Their production support helped us scale globally."
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Olov Hisbed
CEO, CargoBeacon AB (SE)
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"BIII TECH engineered our USB-PD battery bank from PCB to full-stack firmware. Their hardware expertise made GoGoPowerJuice a reality."
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Borey Seng
CEO, GoGoPowerJuice (US)
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"Amazing work with dedication to detail to make the project a success. I've worked multiple projects and very happy with the work and outcome. Would highly recommend and will continue to work on future projects and endeavors."
★
5.0 on Upwork ↗
USB-C PD charging dock — Stage 1
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"It was an amazing experience working with BIII TECH LLP. Goes above and beyond to get the project completed. Communication was concise and prompt, and there was a sense of accountability to help achieve the goals of the project. This was the first time working with BIII TECH LLP, and it won't be my last. Highly recommend!"
★
5.0 on Freelancer ↗
First USB-C PD charger board

Ready to build your next IoT product?

Let's discuss how we can bring engineering excellence to your project. Schedule a free technical discovery call.

Book a Discovery Call sales@biii.in