# ESP32 vs STM32 vs Raspberry Pi · 2026 IoT hardware pick

> ESP32 is the default for Wi-Fi / BLE IoT. STM32 wins on low-power + motor control. Pi when you need a full OS.

ESP32 for connected IoT where Wi-Fi / BLE is the killer feature. STM32 for low-power battery-op, precise timing, safety-critical. Raspberry Pi when you need a full Linux OS and can afford the power budget.

## ESP32 fits when

- Wi-Fi / BLE connectivity required
- Low unit cost ($2-8)
- OTA updates + cloud sync

## STM32 / Raspberry Pi fits when

- STM32: battery life > 1 year required
- STM32: motor control, precise timing
- Pi: full Linux / Python / Node.js
- Pi: computer vision / edge ML

| Factor | ESP32 | STM32 / Raspberry Pi |
| --- | --- | --- |
| Unit cost (2026) | $2-8 | STM32 $3-25, Pi $15-80 |
| Power (sleep) | ~10µA | STM32 <1µA, Pi >100mA |
| Connectivity | Wi-Fi + BLE built-in | STM32 external, Pi built-in |
| Compute | 240MHz dual, RISC-V | STM32 up to 480MHz, Pi GHz class |
| OS support | FreeRTOS / bare / Arduino | STM32 RTOS, Pi Linux |
| Development speed | Fast (Arduino, ESP-IDF) | STM32 medium, Pi fast |
| We recommend | Connected IoT, low cost | STM32 for low-power / precision, Pi for Linux / ML |

## What to take away

- ESP32 · Wi-Fi / BLE connectivity required
- ESP32 · Low unit cost ($2-8)
- ESP32 · OTA updates + cloud sync
- STM32 / Raspberry Pi · STM32: battery life > 1 year required
- STM32 / Raspberry Pi · STM32: motor control, precise timing
- STM32 / Raspberry Pi · Pi: full Linux / Python / Node.js

## Tags

ESP32, STM32 / Raspberry Pi

## Questions this answers

**When is ESP32 the right choice?**

Wi-Fi / BLE connectivity required Low unit cost ($2-8) OTA updates + cloud sync

**When is STM32 / Raspberry Pi the better choice?**

STM32: battery life > 1 year required STM32: motor control, precise timing Pi: full Linux / Python / Node.js Pi: computer vision / edge ML

## We build this for clients

https://dfieldsolutions.com/en/services/full-stack

## More from the lab

- https://dfieldsolutions.com/en/lab/vallalkozz-digitalisan.md — Vállalkozz Digitálisan: buying software from an accredited supplier
- https://dfieldsolutions.com/en/lab/custom-software-cost.md — What custom software actually costs
- https://dfieldsolutions.com/en/lab/custom-vs-off-the-shelf.md — Custom software or off the shelf: the honest test
- https://dfieldsolutions.com/en/lab/first-90-days-retainer.md — The first ninety days of a retainer, as it actually goes

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Source: https://dfieldsolutions.com/en/lab/esp32-vs-stm32-vs-raspberry-pi
DField Solutions — Torony köz 5-1.a, 2120 Dunakeszi, Hungary — +36 20 722 0002 — dezso@dfieldsolutions.com
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