Opinion

The ESP32 Family, Explained Honestly

A plain-language walkthrough of every real ESP32 family (and the ESP8266), what each is actually good at, and which one to reach for depending on what you're building.

21 september 2026 4 min read

If you’ve ever searched for which ESP chip to use, you’ve probably noticed there isn’t just one ESP32: there’s the original ESP32, an S series, a C series, an H series, a P series, plus the older ESP8266. Most guides assume you already know the difference. This one doesn’t. Here’s what each family actually is, what it’s good at, and which one to reach for.

What “ESP” actually means

ESP chips are microcontrollers made by Espressif: small, cheap computers built to control hardware and connect to a network. They show up in smart-home devices, sensors, IoT projects, automation and DIY electronics generally. Different families trade off power consumption, wireless protocol support, security features and raw performance.

Quick comparison

Family	CPU	Wireless	Strength	Best for
ESP8266	Single-core Xtensa	Wi-Fi only	Cheapest	Very simple IoT
ESP32 (original)	Dual-core Xtensa LX6	Wi-Fi + BLE	Balanced, huge community	Most projects
ESP32-S2 / S3	Xtensa LX7	Wi-Fi + BLE (S3 only)	Native USB, AI instructions (S3)	Displays, cameras, advanced builds
ESP32-C2 / C3 / C6	RISC-V	Wi-Fi + BLE, C6 adds Thread/Zigbee	Low power, modern	Sensors, battery devices
ESP32-H2	RISC-V	BLE + Thread/Zigbee, no Wi-Fi	Built for Matter/Thread	Smart-home nodes
ESP32-P4	Dual-core RISC-V	None built in	High-performance applications processor	Camera/HMI, paired with a separate radio chip

ESP8266: the classic beginner chip

Processor: Tensilica L106, single-core, ~80–160MHz.

Good at: ultra-cheap Wi-Fi projects, learning the basics. Limited by: little RAM, no Bluetooth, fewer GPIOs. Not ideal for: HomeKit or Matter, or anything doing more than one thing at once.

Still useful, but outdated for most serious builds. This site’s ESP8266 pinout guide covers the specifics.

ESP32 (original): the default choice

Processor: dual-core Xtensa LX6, up to 240MHz. This is the chip that made ESP32 the name people reach for.

Strengths: fast, stable, cheap, the largest library and tutorial ecosystem of any of these chips. Good for: HomeKit accessories, dashboards, displays, motor control, real-time automation, all backed by mature Wi-Fi, MQTT and OTA support.

If you don’t know which chip to pick, pick this one. See this site’s ESP-WROOM-32D pinout guide and the ESP32 HomeKit development guide.

ESP32-S series (S2 / S3): the power-user chips

Processor: Xtensa LX7, focused on performance and peripherals. Special features: native USB, AI/vector instructions (S3 only), camera support.

Good for: voice assistants, camera projects, USB HID devices, advanced UI builds. Fully compatible with esp32-homekit; the S3 also has solid Matter support.

This site covers the ESP32-S2 Mini and the AI-S3 (ESP32-S3).

ESP32-C series (C2 / C3 / C6): Espressif's modern direction

Processor: RISC-V. Advantages: very low power, cheap, modern architecture, strong wireless stacks. C3 is the cheap, stable default; C6 adds Wi-Fi 6 plus Thread and Zigbee on top of Wi-Fi and BLE.

Good for: battery sensors, smart switches, IoT nodes, mesh networks. Works well with esp32-homekit (C3/C6 recommended), and the C6 has excellent Matter support.

See this site’s ESP32-C2, ESP32-C3, ESP32-C5 and ESP32-C6 pinout guides.

ESP32-H2: built for smart-home protocols

Processor: RISC-V. Unlike the other families here, the H2 has no Wi-Fi radio at all, only Bluetooth LE and 802.15.4 (Thread and Zigbee). That’s deliberate: it’s built specifically to speak Matter, Thread and Zigbee directly to smart-home hubs and mesh networks, not to host a Wi-Fi connection itself.

Good for smart lights, sensors and switches that join a Thread/Zigbee mesh rather than your Wi-Fi network directly.

ESP32-P4: the high-performance outlier

The ESP32-P4 is a different kind of chip from the rest of this list: a dual-core, high-clock RISC-V applications processor built for camera, display and HMI workloads, with no wireless radio built in at all. It’s meant to pair with a separate, small connectivity chip (an ESP32-C6, for example) over a wired link when a project needs both serious local processing and a network connection.

Overkill, and the wrong tool, for a typical DIY sensor or smart-home accessory, this is for camera/vision or UI-heavy projects that need more CPU/GPU-adjacent power than the Wi-Fi-integrated chips above provide.

HomeKit, Matter, Thread and Zigbee support

Chip	HomeKit (esp32-homekit)	Matter	Thread / Zigbee
ESP8266	Limited	No	No
ESP32 (original)	Yes	Experimental	No
ESP32-S3	Yes	Yes	No
ESP32-C6	Yes	Yes	Yes
ESP32-H2	No Wi-Fi, not applicable	Yes	Yes

For an esp32-homekit project specifically, the recommended chips are the original ESP32, the ESP32-S3, the ESP32-C3 and the ESP32-C6. See this site’s own Matter project if you’re building toward Matter rather than classic HomeKit.

Which ESP should you use?

Learning / first project: the original ESP32
Smart-home node on a Thread/Zigbee mesh: ESP32-C6 or ESP32-H2
Battery-powered sensor: ESP32-C3
Camera, display or heavier UI: ESP32-S3
Vision/HMI processing paired with a separate radio: ESP32-P4

The honest final verdict

If only one chip: the original ESP32 is still the best overall pick for most people. It’s the cheapest powerful option, extremely stable, has the largest community, and works with nearly every library and tutorial out there. For 90% of DIY projects, you don’t need anything else.

Choosing the right chip isn’t about picking the newest one, it’s about picking the one that actually fits what you’re building.