Bluetooth development
Bluetooth is flaky. We make it reliable.
Bluetooth is a difficult technology to get right. The radio spectrum is noisy and hard to control — and even when you can control it, connections drop, devices misbehave, and what worked in the lab falls apart in the real world.
Firmware, mobile and desktop apps — one team, both sides of the connection.
What we’ve built
Bluetooth projects we’ve delivered.
Wearable firmware + app
We built both the mobile app and the wearable firmware for HabitAware, using Nordic Semiconductor chipsets and real-time operating systems. One team on both sides means no miscommunication between separate firmware and mobile teams.
Automotive diagnostics
Bluetooth OBD-II dongles talking to a custom CAN bus software layer in the mobile app, backed by a cloud API and an automobile safety systems database. The app reads the car’s data bus, pulls diagnostics and generates PDF reports.
Accessibility & assistive technology
Two fully native apps (iOS and Android) working as both Bluetooth Central and Peripheral with the SmartDrive wearable and motor.
Sports & fitness wearables
A companion mobile app for the Suunto sports watch: syncing activity data, managing device settings and keeping a stable connection during active use.
Both sides of the connection
Bluetooth firmware and mobile app development.
One team writes the firmware and the app, so protocol decisions, GATT characteristics and packet sizes line up from the start.
- Mobile apps — Android & iOS Your users get a reliable experience on any phone.
- Desktop apps — macOS & Windows For workflows that run on a computer.
- Embedded firmware Nordic Semiconductor and other chipsets, with real-time operating systems.
- On-screen displays Low-level graphics on small wearable screens.
- Over-the-air firmware updates Ship improvements to devices already in the field.
- Nordic nRF53 series expertise Dual Arm Cortex-M33 SoC: a dedicated network core runs BLE at 64 MHz and the application core at 128 MHz. A crash in your app code doesn’t take down the connection.
Hardware strategy
Bluetooth hardware selection and consulting.
Chipset selection
Off-the-shelf platform evaluation
Hard-won experience
Solving real-world Bluetooth and BLE problems.
The storeroom problem
A client’s custom devices shipped powered on. When updating firmware, the app listed thousands of nearby devices broadcasting. We used signal strength as a sorting criterion, surfacing only the nearest device.
Android fragmentation
Android handsets vary dramatically in actual Bluetooth capabilities — broadcasting support, connection limits and feature availability differ device to device. We’ve navigated this across dozens of device combinations so your users don’t hit the problems first.
Noisy RF environments
Many teams build and test in a controlled lab and call it done. We test in progressively noisier RF conditions, because that’s what the real world looks like. Robust error handling isn’t optional — it’s essential.
Quality assurance
How Modern Logic tests Bluetooth applications.
We build device simulators: a second handset running a Bluetooth peripheral simulator that speaks the same protocol as the real hardware.
That lets us…
- Trigger edge cases on demand — low battery, storage full, connection drops.
- Test against different firmware versions without reflashing.
- Validate the right UI response to every device state.
Compliance built in
Secure by default — built for HIPAA.
If your device touches protected health information, compliance is designed in from day one — not bolted on before launch.
Structured logging
Field-level pruning
Session-based anonymization
Rotating on-device logs
How we work
Our process for Bluetooth projects.
Bluetooth projects have more moving parts than typical software — firmware, mobile, RF behavior, hardware quirks, and real-world conditions that can’t be fully simulated. Our process accounts for all of it.
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Include the radio environment.
Not just features: connection behavior, error handling and edge cases are part of the spec.
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Working builds at every stage.
Milestone-based delivery, with builds you can test on real hardware each step of the way.
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Across devices and OS versions.
Professional QA on the phones, tablets and operating system versions your users actually have.
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Tested where it will live.
Progressive testing in noisy RF environments — the conditions a lab can’t fully simulate.
By the time we deliver, the system has been tested across builds, devices, and conditions. It’s not a first draft.
FAQ
Frequently asked questions.
Straight answers to what people ask us before a Bluetooth project.
How do I build a mobile app for my Bluetooth device?
Modern Logic builds mobile apps that communicate with Bluetooth and Bluetooth Low Energy (BLE) devices across iOS, Android, macOS, and Windows. We handle the full connection layer — device discovery, pairing, data transfer, error recovery, and firmware updates — so your app works reliably outside the lab, not just on the bench.
Can one company build both my firmware and my mobile app?
Modern Logic builds both sides. We write the embedded firmware on chipsets like the Nordic nRF5340 and build the companion mobile or desktop app. Having one team own both sides means protocol decisions, GATT characteristics, and packet sizes stay aligned from the start — no weeks lost to miscommunication between separate firmware and mobile vendors.
How do I find a Bluetooth app development company?
Modern Logic is a custom software development firm based in Minneapolis, Minnesota (Twin Cities) that specializes in Bluetooth and BLE product development. We’ve shipped Bluetooth systems for companies like Permobil, CalPro, HabitAware, and Suunto — spanning wearables, automotive diagnostics, assistive technology, and fitness devices.
Who builds Bluetooth apps in Minneapolis / Twin Cities?
Modern Logic is headquartered in the Twin Cities and has been building Bluetooth-connected products for over a decade. Our team builds mobile apps, embedded firmware, and cloud backends for Bluetooth-enabled devices — all under one roof.
How do I choose a Bluetooth chip for my hardware product?
Modern Logic helps companies evaluate Bluetooth chipsets based on price, capability, power consumption, and production volume availability. Not every project needs the newest chip — sometimes a mature, lower-cost option is the right call for your margins and supply chain. We’ve done chipset selection for clients like CalPro and have guided startups through hardware decisions from prototype to production.
How do I update firmware on a Bluetooth device over the air?
Modern Logic builds over-the-air (OTA) firmware update systems that let you push improvements, bug fixes, and new features to devices already deployed in the field. We handle the full update flow — from the mobile app triggering the update, to transferring the firmware image over BLE, to verifying a successful install — including error recovery if the connection drops mid-update.
Can I prototype a Bluetooth product with off-the-shelf hardware?
Modern Logic helps startups identify existing off-the-shelf platforms — like development boards or smartwatches with exposed debug access — that are close enough to the target product to prove a concept without custom hardware. This can save months of development time and significant cost, getting you to a working demo for investor conversations or early user testing faster.
Do I need HIPAA compliance for my Bluetooth health device?
If your Bluetooth device collects, transmits, or stores protected health information (PHI), then yes — HIPAA compliance is required. Modern Logic builds HIPAA-compliant Bluetooth systems with structured logging, field-level data pruning, session-based anonymization, and secure data offloading. We’ve built healthcare-connected systems and design compliance in from day one, not as an afterthought.
Why is Bluetooth so unreliable?
Bluetooth operates in the crowded 2.4 GHz band, sharing spectrum with Wi-Fi, microwaves, and other devices. Connections drop, signal strength varies, and different phones implement the Bluetooth spec differently. Modern Logic has shipped Bluetooth products across dozens of device combinations and real-world RF environments. We build robust error handling, connection recovery, and progressive testing into every project so your product holds up outside the lab.
How do I handle Bluetooth differences across Android devices?
Android handsets vary dramatically in their actual Bluetooth capabilities — broadcasting support, connection limits, and BLE feature availability differ from device to device, and the specs don’t tell you the full story. Modern Logic has navigated this fragmentation across dozens of Android device and OS version combinations. We dig into the specific Bluetooth chip in each handset and test against real hardware so your users don’t discover compatibility problems first.
How do I test a Bluetooth app in real-world conditions?
Modern Logic builds custom device simulators that run on a second handset, mimicking the real Bluetooth peripheral’s protocol. This lets us trigger edge cases on demand — low battery, storage full, connection drops — without waiting for real-world conditions or burning through limited test hardware. We also test progressively in noisy RF environments, because a product that only works in a quiet lab isn’t ready to ship.
Let’s talk about your Bluetooth project.
Whether you’re building a wearable, connecting to automotive systems, deploying IoT sensors, or need reliable device-to-app communication — we’ve seen the problems you’re about to hit. Tell us what you’re building. No commitment, no sales pitch: just a straight conversation about what it’ll take.
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