Embedded firmware
Reliable C/C++ firmware for ESP32 and ARM microcontrollers: drivers, RTOS tasks, low-power modes and secure over-the-air updates.
Firmware, PCB design and IoT, end to end.
Custom boards, firmware for ESP32, ARM and Raspberry Pi, and the cloud and apps behind them, engineered by the same team. No hand-off between a hardware vendor and a software agency, so nothing gets lost in between.
Based in Phoenix, Arizona, we work remote-first with companies anywhere in the US, and on-site for installations and testing when the project calls for it.
What we build
When software needs a body.
That's the "H" in H&S. From a first prototype to a board revision for an existing product, we design the electronics and the code that runs on them.
Raspberry Pi & edge devices
Embedded Linux gateways, kiosks and edge computers running containerized applications, updated and managed remotely.
PCB design & prototyping
Schematics, multilayer layout, BOM and manufacturing files, from an idea to a working, testable prototype.
Sensors, power & testing
Sensor integration, power design and bench test tooling to validate every board revision before it goes to production.
Connected products & IoT
Devices that report to the cloud over Wi-Fi, Ethernet or 4G LTE through MQTT, with the APIs, dashboards and alerts on top.
Product redesigns
Re-engineered electronics for new uses, obsolete parts or lower cost: new circuits, PCB revisions and firmware ports.
How it fits together
One team for every link, from the board to the app.
Most connected projects stall at the boundary between hardware and software. We design each link knowing what the next one needs.
- 01 · HardwarePCB & sensorsBoards, power, I/O
- 02 · FirmwareESP32 / RPiC/C++, RTOS, OTA
- 03 · MessagingMQTT brokerTLS, QoS, retained state
- 04 · CloudAPIs & dataAzure, AWS, SQL/NoSQL
- 05 · ExperienceWeb & mobileDashboards, alerts
Secure by design
Encrypted device links, least-privilege cloud access and signed firmware updates from day one, not bolted on before launch.
DevOps for devices
Firmware goes through the same CI/CD as your apps: built, tested and rolled out over the air in stages. Cloud & DevOps
Built to adapt
Modular architecture: swap a sensor, add a cloud region or a new app without a rewrite.
Technologies
Proven parts and open protocols.
We choose components and protocols that are well supported and easy to source, so your product can be built, maintained and extended for years.
Microcontrollers
ESP32ARMC / C++FreeRTOS
Edge
Raspberry PiEmbedded LinuxContainers
Connectivity
MQTTWi-Fi · Ethernet4G LTEModbus
Cloud & apps
AzureAWSAngularReact
Who we work with
From a first prototype to a product in the field.
New connected products
You have a device idea and need a prototype that works end to end, from the board to the app, to show customers or investors.
Products that need a new revision
A part went obsolete, costs went up or the product needs a new feature. We redesign the board and port the firmware.
Equipment you want to monitor
Machines, sites or sensors you need to see and control remotely, with gateways and dashboards your team can use from anywhere.
Plants and production lines
Test stations, traceability and monitoring that connect your machines to your data. Manufacturing software
Need the web or mobile application behind the device? We build that too. Software development
FAQ
Firmware and IoT questions.
Don't see yours? Send us a message — we reply within one business day.
Ask a questionCan you take a product from idea to a working prototype?
Yes. We design the schematic and the board, write the firmware, and build the cloud and app side, so you get a prototype that works end to end and can be tested with real users.
Do you manufacture the boards?
We deliver the schematics, layout, BOM and manufacturing files your contract manufacturer needs, and we validate each board revision with bench test tooling before production.
Can you work on our existing hardware or firmware?
Yes. We fix and extend existing firmware, port it to new microcontrollers, and redesign boards for obsolete parts, lower cost or new features.
How are devices updated once they are in the field?
With signed over-the-air updates, built and tested in a CI/CD pipeline and rolled out in stages, so a problem reaches a few devices instead of all of them.
Who owns the designs and the code?
You do. Schematics, PCB files, firmware, cloud code and documentation are delivered to you and live in your repositories.
Have a device in mind?
Book a free 30-minute call to talk through the hardware, the firmware and the fastest path to a working prototype.