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Which ESP32 should you use?
A practical comparison of the whole family. Specifications are the commonly cited figures — always confirm against the datasheet for your exact module.
| Chip | Core | Clock | Wi-Fi | Bluetooth | USB | ADC | DAC | GPIO | Year | Best for |
|---|---|---|---|---|---|---|---|---|---|---|
| ESP32 pinout | Xtensa LX6 双核 | 240 MHz | 802.11 b/g/n | BT 4.2 + BLE | 无 | 18 通道 12-bit | 2 × 8-bit | 约 26 | 2016 | 存量项目、资料最多 |
| ESP32-S2 pinout | Xtensa LX7 单核 | 240 MHz | 802.11 b/g/n | 无 | USB OTG | 20 通道 13-bit | 2 × 8-bit | 43 个物理脚 | 2020 | USB HID、无蓝牙场景 |
| ESP32-S3 pinout | Xtensa LX7 双核 | 240 MHz | 802.11 b/g/n | BLE 5 | OTG + Serial/JTAG | 20 通道 12-bit | 无 | 约 30+ | 2021 | 新项目首选、AI/视觉 |
| ESP32-C3 pinout | RISC-V 单核 | 160 MHz | 802.11 b/g/n | BLE 5 | Serial/JTAG | 6 通道 12-bit | 无 | 约 14 | 2021 | 低成本替代 ESP8266 |
| ESP32-C6 pinout | RISC-V 高性能 + LP 核 | 160 MHz | Wi-Fi 6 (802.11ax) | BLE 5 + Thread/Zigbee | Serial/JTAG | 7 通道 12-bit | 无 | 31 个物理脚 | 2023 | Matter / Thread 智能家居 |
| ESP32-H2 pinout | RISC-V 单核 | 96 MHz | 无 | BLE 5 + 802.15.4 | Serial/JTAG | 5 通道 12-bit | 无 | 28 个物理脚 | 2023 | 低功耗 Thread/Zigbee 节点 |
| ESP32-P4 pinout | RISC-V 双核 + LP 核 | 360 MHz | 无（需外挂 C/S 系列） | 无 | USB 2.0 OTG HS + FS | ADC1 + ADC2 | 无 | 55 个物理脚 | 2025 | HMI 屏显、边缘计算 |
Rule of thumb：New designs: ESP32-S3 unless cost is king, then ESP32-C3. Need Wi-Fi 6 or Thread/Matter: ESP32-C6. No Wi-Fi at all, just a low-power mesh node: ESP32-H2.