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I will nrf52 ble firmware and a flutter companion app for your device
Embedded Syetems PCB Design Firmware IoT Low Power Manangement ESP32
👋 Hi.
I am an Embedded System Engineer, PCB Designer, and Firmware Developer with 10+ years of experience.
I help turn ideas into reliable electronic products, from schematic and PCB design to firmwa...
About this Gig
I build both halves of a BLE product: the nRF52 firmware and the Flutter app
that talks to it. No integration gap between the two sides.
WHAT I DELIVER
- nRF52832/nRF52840 firmware on Zephyr / nRF Connect SDK: custom GATT services,
advertising, bonding, notifications, MTU and throughput tuning
- Peripheral + Observer in one device: iBeacon scanning, RSSI averaging,
room-level positioning
- Sensor and I/O pipelines: IMU motion classification, SAADC battery gauging,
I2S audio, haptics, SPI NOR flash logging
- Flutter app with flutter_blue_plus: scan, pair, live dashboard, charts,
SQLite history, notifications, platform channels
- A documented binary protocol (CRC-framed) with host unit tests, so app and
firmware cannot drift apart silently
RECENT WORK
A wearable sensor node: 20+ GATT commands and events, motion-based detection,
BLE beacon localisation, audio upload to flash, Flutter dashboard with SQLite
history. Delivered with a full engineering report.
HOW I WORK
You get a build that flashes, an APK that runs, and a written protocol spec.
Message me with your chip, sensors and screens before ordering and I will say
honestly whether it fits one gig or needs milestones.
My Portfolio
Other Electronics Engineering Services I Offer
FAQ
Which Nordic chips do you support?
A. nRF52832, nRF52833 and nRF52840 on Zephyr / nRF Connect SDK, and nRF5340 on request. I work on the Nordic DK boards or on your custom PCB, flashed over J-Link or SWD.
I only need the app / I only need the firmware. Is that fine?
A. Yes. Either half alone is priced from the Standard package. If the other side already exists, send me its GATT UUIDs or the source and I will match the protocol exactly.
Do you support iOS as well as Android?
A. Flutter builds for both. Android is included in every package. iOS is a Premium item or a gig extra, because it needs Core Bluetooth behaviour checks and an Apple developer account on your side.
Do I get the source code?
A. Yes, all of it, with commented source, a build guide and the protocol specification. The code is yours; I keep no license over it.
Do you have hardware to test on?
A. I own nRF52840 DKs and BLE beacons, so firmware is verified on real silicon. For your custom board, ship one unit or plan a remote debugging session — I will tell you which is cheaper before you order.
