What Is Embedded Firmware Development? A Buyer's Guide for Founders
Last updated: June 2026
Quick answer: Embedded firmware is the software that runs directly on a hardware product's microcontroller — reading sensors, controlling motors, managing power and connectivity. Unlike apps, firmware runs on tiny processors with kilobytes of memory, must work for years without crashing or updates, and bugs can brick physical devices. In Australia, firmware development typically costs AUD $100–$200/hour, with a product's firmware usually representing 25–40% of total development cost.
Firmware vs software: why your app developer can't do this
| Mobile/web software | Embedded firmware | |
|---|---|---|
| Runs on | Phones/servers (GBs of RAM) | Microcontrollers (KBs of RAM) |
| If it crashes | App restarts | Device bricks, in a paddock, 300 km away |
| Updates | Push anytime | OTA must be engineered in — or it's a screwdriver |
| Power | Irrelevant | Often the entire product (battery life = sales) |
| Timing | "Fast enough" | Hard real-time: motor control, safety, sensor sampling |
| Debugging | Logs everywhere | JTAG probes, oscilloscopes, logic analysers |
This is why hiring a general software shop for a hardware product fails so often: the skills genuinely don't transfer.
What firmware work actually includes
Driver development (making the micro talk to each sensor and chip on your board), power management (the difference between 6 months and 3 years of battery life), connectivity stacks (BLE, LoRaWAN, cellular — each with its own failure modes), over-the-air update systems (non-negotiable for any fleet product), and the unglamorous 30%: watchdogs, fault recovery, and field diagnostics that determine whether your product survives year two.
What it costs and how long it takes (Australia, 2026)
Simple device firmware (read sensors, send data, sleep): AUD $8,000–$20,000 over 4–8 weeks. Moderate (multiple peripherals, OTA, power optimisation, robust connectivity): $20,000–$50,000 over 2–4 months. Complex (real-time control, safety functions, edge ML): $50,000+ and tightly coupled to hardware iterations.
How to buy firmware well — 5 questions
- "Which microcontroller families have you shipped on, and why would you choose one for my product?" (specifics, not brands-dropping)
- "How do you handle OTA updates and a failed update halfway through?" (the answer reveals production experience instantly)
- "What's your battery-life estimation process — before the hardware exists?"
- "Show me firmware running in a deployed product today."
- "Do you write the firmware and the cloud side, or hand off at the API?" — handoffs at the device-cloud boundary are the most expensive seam in IoT.
Frequently asked questions
Can firmware be developed before the PCB exists?
Yes — and it should be. Development kits let firmware progress in parallel with board design, cutting months off the timeline.
What is RTOS and do I need one?
A real-time operating system schedules tasks on the micro. Products juggling connectivity + sensing + control usually benefit (FreeRTOS and Zephyr are 2026's defaults); simple sensors often don't. A good partner justifies the choice either way.
Who owns the firmware source code?
You should — in the contract, including build environment and documentation. Firmware lock-in is real vendor leverage; refuse it.
Further reading
- Embedded firmware and hardware engineering
- IoT systems and connectivity
- Case study: smart street lighting control
Incendio Solutions writes firmware for constrained embedded targets as part of full product programs — 66+ shipped projects. Tell us about your device.