An embedded system is a computer built into a device to do one specific job. Microcontrollers, firmware, IoT, and a hardware product’s journey from idea to mass production.
What is an embedded system?
An embedded system is a combination of electronics and software built into a device to do one specific job, rather than a general-purpose computer. A washing machine’s control board, a smartwatch, a sensor unit, a car’s control modules or a smart meter are all embedded systems. Users rarely notice them; they just see the device working.
Core components
At its heart there is usually a microcontroller (MCU): a small computer with processor, memory and input/output on a single chip. The ESP32 and STM32 families are common examples. Around it sit sensors, motor drivers, power management and communication modules (BLE, Wi-Fi, LoRa), all brought together on a printed circuit board (PCB).
Embedded software (firmware)
The software that runs the hardware is called firmware. Resources are tight: a few hundred kilobytes of memory, and every milliamp counts on battery-powered devices. Firmware is therefore built with real-time operating systems such as FreeRTOS or Zephyr, careful memory management and power optimization. Updating devices in the field over the air (OTA) should be planned from the start.
IoT: from device to cloud
The Internet of Things (IoT) is embedded devices carrying their data to the internet. Sensor data travels over BLE or Wi-Fi to a gateway and on to the cloud over lightweight protocols such as MQTT; users then see it in a web panel or a mobile app. A good IoT product comes from designing hardware, firmware, cloud and app as one architecture.
From idea to mass production
The process usually starts with a proof of concept on development boards, followed by custom PCB design, prototype production, field tests and production readiness. In mass production, component sourcing, test fixtures, certification (such as CE) and cost optimization become decisive. Thinking these stages through early reduces surprises on the way from prototype to product.
Where are they used?
Smart agriculture and greenhouse monitoring, energy and metering systems, industrial machine monitoring, health and wearable devices, smart buildings and security systems, logistics tracking. Embedded systems also feature often in regional development and R&D projects.
Embedded systems at WaveArc
From PCB design to firmware, from sensor to cloud and mobile app, we build hardware products end to end. You can find our approach on our Embedded Systems & Hardware service page.
