PGParthraj Gohil
About Expertise Work Case studies CoreFragment Writing Contact
Available for firmware & IoT engagements

Firmware for hardware that has to work.

I'm Parthraj Gohil — an embedded systems and IoT architect with 15 years turning silicon into shipping products: RTOS firmware, wireless connectivity, and secure device-to-cloud systems. Founder of CoreFragment.

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01

About

I design and write the firmware layer where physics meets software — the code that runs on a microcontroller, talks to sensors and radios over SPI, I2C and UART, and carries data reliably all the way to the cloud.

Over the past fifteen years I've shipped more than two dozen connected products across industrial IoT, consumer devices, medical, and critical-infrastructure monitoring — as a hands-on engineer, a firmware architect, and a team lead. The work ranges from a BLE driver inside a VR headset to encrypted asset-tracking networks and low-power wide-area devices on Amazon Sidewalk and LoRaWAN.

Today I run CoreFragment, my firmware and IoT engineering practice, where I help companies take hardware from prototype to production.

FocusEmbedded · IoT · Firmware
Experience15 years
M.TechSoftware Systems, BITS Pilani
B.E.Electronics & Comm. Engg.
VentureCoreFragment
Based inIndia · works globally
15
Years in embedded
25+
Products shipped
6+
Wireless stacks
Lead
Architect & team lead
02

Expertise

Firmware & RTOS

  • Zephyr
  • TI-RTOS
  • VxWorks
  • Nordic SoftDevice
  • FreeRTOS
  • Bare-metal

Wireless & connectivity

  • BLE / BLE5
  • Wi-Fi
  • LoRaWAN
  • Amazon Sidewalk
  • Cellular (BG96)
  • RF / mesh

Silicon & modules

  • Nordic nRF52 / nRF51
  • TI CC26xx / CC3200
  • STM32
  • Laird Pinnacle / BL600
  • Qualcomm XR2
  • NXP i.MX6

Protocols & buses

  • SPI
  • I2C
  • UART
  • Modbus
  • RS-485
  • MQTT
  • RTP / RTSP

Cloud & edge

  • AWS IoT Core
  • AWS Lambda
  • Secure device↔cloud protocols
  • OTA updates
  • Edge data pipelines

Mobile & OS

  • Android OS / HAL
  • Android RIL
  • BLE companion apps
  • Linux (embedded)
  • C / C++ / Python
03

Selected work

A sample of shipped products and engagements. Client names are withheld under NDA; the engineering is described by domain.

Spatial computing/01

AR/VR controller tracking

Built the BLE-HID driver and controller firmware linking a motion peripheral to an XR headset, plus a time-sync algorithm that keeps sensor data aligned for positioning.

PlatformQualcomm XR2 · nRF52840
StackAndroid · Zephyr · BLE HID
RoleFirmware / driver
Industrial IoT/02

Asset-tracking network

Architected battery-operated trackers and cellular gateways with an encrypted device-to-cloud protocol over MQTT. Led a four-engineer team from architecture to production.

PlatformnRF52840 · BG96 cellular
StackZephyr · AWS IoT · Lambda
RoleArchitect · team lead
Infrastructure safety/03

Structural monitoring

Vibration- and tilt-monitoring device for buildings and critical structures, with encrypted on-device storage and BLE5 retrieval — designed to warn authorities before failures cost lives.

PlatformLaird Pinnacle 100 (nRF52)
StackZephyr · accelerometer DSP
RoleFirmware architect
Digital health/04

Connected glucometer

A BLE blood-glucose meter and companion app that streams readings, reminds patients to test, flags abnormal results, and shares reports with clinicians.

PlatformLaird BL600
StacksmartBASIC · BLE UART · Android
RoleFirmware + mobile
Consumer IoT/05

Low-power wide-area devices

Connectivity firmware for low-power consumer devices on Amazon Sidewalk and LoRaWAN — provisioning, long-battery operation, and reliable uplink in noisy RF environments.

PlatformNordic · Semtech LoRa
StackAmazon Sidewalk · LoRaWAN
RoleFirmware / connectivity
Connected buildings/06

Smart water management

Firmware for a connected plumbing and water-management product line — sensing, Wi-Fi connectivity, and cloud reporting for commercial fixtures.

PlatformWi-Fi SoC · cloud
StackEmbedded C · MQTT
RoleFirmware consulting
04

Case studies

Two engagements in more depth — the problem, the approach, and what shipped. Clients withheld under NDA.

Industrial IoT

Asset-tracking network

PlatformnRF52840 · BG96
StackZephyr · AWS IoT
RoleArchitect · lead
Team4 engineers

Challenge

A hardware team needed battery-powered asset trackers and cellular gateways that could run for months in the field and report location and sensor data to the cloud — securely, and at scale.

Approach

I architected the firmware for the nRF52840 trackers and BG96 cellular gateways on Zephyr, designed an encrypted device-to-cloud protocol over MQTT to AWS IoT, and led a four-engineer team from architecture through to production.

Outcome

Shipped to production: a power-optimised design built for long battery life, with an end-to-end encrypted link protecting data from device to cloud.

Infrastructure safety

Structural monitoring

PlatformPinnacle 100
StackZephyr · BLE5
RoleFirmware architect
SensorsAccel · incline

Challenge

Detect dangerous vibration and tilt in buildings and critical structures, and keep the data safe even through connectivity loss — so authorities can be warned before a failure costs lives.

Approach

I led the firmware architecture on the Laird Pinnacle 100 (nRF52 core): accelerometer and inclinometer processing for vibration and tilt, encrypted on-device storage for resilience, and retrieval over BLE5.

Outcome

A rugged monitoring device that captures and stores readings securely on-device and hands them off reliably over BLE5.

My practice

CoreFragment

CoreFragment is my firmware and IoT engineering practice. I partner with hardware teams and founders to take connected products from prototype to production — the firmware, the wireless link, and the path to the cloud — without the project stalling on the hard embedded problems.

Visit corefragment.com
What I take on
  • Firmware architecture & development on constrained MCUs
  • BLE, Wi-Fi, LoRaWAN & Sidewalk connectivity
  • Secure device-to-cloud protocols and OTA
  • Bringing up new silicon & board bring-up
  • Power optimisation for battery-operated devices
  • Technical leadership for embedded teams
05

Writing

Notes · coming soon

I'm starting to write about firmware architecture, wireless connectivity, and what it actually takes to ship hardware. Posts will land here.

Get notified
Free guide

Is your firmware ready to ship?

A practical checklist of the things that decide whether a connected product reaches production on time — across architecture, connectivity, power, security, updates, and certification. Written from 15 years of shipping hardware.

Read the guide →

Let's build something.

Have a connected product that needs firmware, a wireless problem, or a prototype to get to production? Tell me about it.

CoreFragment ↗ LinkedIn ↗