IoT nodes
Sensor-to-cloud firmware handling connectivity, telemetry and OTA updates.
Embedded Firmware Development
C/C++ firmware for ESP32, ESP32-S3, STM32 and Arduino-compatible hardware — the drivers, protocols and application logic that make a board actually do something.
Overview
What this service covers
Firmware sits alongside PCB design as one of the two core engineering disciplines behind every product we build — and it gets its own page here because it's often the harder half of the job. We write embedded C/C++ for ESP32, ESP32-S3, STM32 and Arduino-compatible targets: sensor drivers, communication protocols, power management and the application logic that ties them together, developed and debugged on real hardware rather than left as a simulation.
Client Problems
Problems this service solves
- Hardware is built but there's no firmware for it yet.
- Existing firmware is unstable, undocumented, or was written by someone no longer available.
- A board needs a new communication protocol or sensor driver added.
- Firmware works on the bench but behaves inconsistently once it's actually in the field.
- A product needs OTA updates added after shipping without them.
Capabilities
What we do
- Embedded C/C++ firmware architecture
- ESP32, ESP32-S3, STM32 and Arduino-compatible firmware
- Device drivers for sensors, displays and motor controllers
- Communication protocols: SPI, I²C, UART, CAN, RS-485, BLE, Wi-Fi, LoRa
- MQTT integration for cloud-connected devices
- State-machine based application logic
- Hardware-in-the-loop debugging, not just simulation
- Firmware optimisation for power and memory-constrained targets
- OTA update support
Technologies
Tools & platforms
We build on the Espressif IDF and Arduino frameworks for ESP32/ESP32-S3, and STM32 HAL-based development for STM32 targets, with JTAG/SWD hardware debugging used to diagnose issues that only show up on the actual board.
ESP-IDFArduino FrameworkSTM32 HALBLE / Wi-Fi / LoRaMQTT
Development Process
How we approach a firmware project
- 01Requirements & interfaces
Confirm what the firmware needs to do and which peripherals/protocols it touches.
- 02Architecture & drivers
Design the firmware structure and the drivers it depends on.
- 03Implementation
Write and unit-test the firmware against the target hardware.
- 04Field validation
Debug on real hardware and confirm behaviour under actual operating conditions.
Deliverables
What you receive
- Firmware source code
- Build and flashing instructions
- Protocol and interface documentation
- Debugging and test notes
Applications
Where this is used
Industrial controllers
Firmware for automation hardware talking RS-485/Modbus on a plant floor.
Wireless & RF nodes
LoRa and UWB firmware for long-range telemetry and indoor positioning.
Related Services
Often paired with
PCB Design
The board this firmware runs on.
ESP32 & UWB Development
ESP32-specific firmware, ranging and wireless connectivity.
IoT Product Development
Firmware as part of a complete connected product.
Discuss Your Firmware Requirements
Send your hardware details and what the firmware needs to do.