ESP8266 vs ESP32 vs ESP32-S2 vs ESP32-C3
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Compare Espressif SoCs ESP8266 vs ESP8285 vs ESP32 vs ESP32-S2 vs ESP32-C3
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Compare Espressif SoCs ESP8266 vs ESP8285 vs ESP32 vs ESP32-S2 vs ESP32-C3
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Short name | ESP32 | ESP32-C3 | ESP32-C3-WROOM-02U | ESP32-S2 | ESP8266 | ESP8285 |
|---|---|---|---|---|---|---|
| Description | ESP32-C3 is pin-compatible with ESP8266. It has a single core RISC-V 32-bit CPU @160 MHz and includes 400 kB of SRAM and 384 kB of flash built-in. | The ESP8285 is similar to the ESP8266, but has built-in 1 MiB of flash. | ||||
| Website | espressif.com/... | espressif.com/... | espressif.com/... | espressif.com/... | espressif.com/... | espressif.com/... |
| Release date | 2016 | 2020 | 2021 | 2019 | 2014 | 2016 |
| Product details | ||||||
| CPU | Tensilica Xtensa LX6 32 bit Dual-Core @ 160 / 240Mhz | RISC-V 32-bit Single-Core @ 160 MHz | 32-bit RISC-V single-core processor | Tensilica Xtensa LX7 32 bit Single-Core @ 240Mhz | Tensilica LX106 32 bit @ 80 MHz (up to 160 MHz) | Tensilica LX106 32 bit @ 80 MHz (up to 160 MHz) |
| Coprocessor | ULP | ULP (RISC-V) | ||||
| RAM | 520 KB | 400 KB | 320 KB | 50 KB less than | 160 KB | |
| ROM (Flash) | 448 KB | 384 KB | 128 KB | 0 use external SPI flash | 1,024 KB | |
| UART | 3 | 2 | 2 | 2 | 2 | 2 |
| SPI | Yes 4 | Yes 3 | Yes 3 | Yes 4 (OSPI) | Yes 2 | Yes 2 |
| Wi-Fi | Yes 802.11b/g/n | Yes 802.11b/g/n | Yes 802.11b/g/n | Yes 802.11b/g/n | Yes 802.11b/g/n (max 65Mbps) | Yes 802.11b/g/n (max 65Mbps) |
| Bluetooth® | Yes 4.2 BR/EDR + BLE | Yes 5.0 + BLE | Yes 5.0 BLE | No | No | No |
| USB Host | No | No | Yes | No | No | |
| Ethernet (LAN, RJ45) | Yes 10/100Mbps | No | No | No | No | |
| RTC Memory | 16 KB | 8 KB | 8 KB | 16 KB | ||
| External SRAM | 8 MB up to | 128 MB up to | 16 MB up to | |||
| External Flash | 16 MB up to | 1 GB up to | 16 MB up to | |||
| ESP-MESH | Yes | Yes | Yes | Yes | Yes | |
| CAN | Yes v2.0 | No | ||||
| GPIO | 34 | 22 (up to) | 15 (up to) | 43 | 17 (up to) | 17 (up to) |
| Hall effect sensor | Yes | No | No | No | No | No |
| Temperature sensor | Yes | Yes | Yes | Yes | No | No |
| Touch sensors | 10 | No | 14 | No | No | |
| I²C | Yes up to 2 | Yes up to 1 | Yes up to 1 | Yes up to 2 | Yes up to 1 | Yes up to 1 |
| I2S | 2 | 1 | 1 | 1 | 2 | 2 |
| ADC | Yes 12 bit SAR ADC up to 18 channels | Yes 2 × 12-bit SAR ADCs, up to 6 channels | Yes 2 × 12-bit ADC, up to 6 channels | Yes 12 bit SAR ADC up to 20 channels | Yes 10 bit | Yes 10 bit |
| DAC | Yes 8 bit up to 2 channels | No | Yes 8 bit up to 2 channels | No | No | |
| PWM | Yes up to 8 | Yes up to 6 | Yes 8 | Yes 4 | No | |
| SDMMC | Yes | No | No | No | ||
| RMT (remote control) | Yes | Yes | No | No | ||
| LCD Interface | No | No | Yes | No | No | |
| Camera Interface | No | No | No | Yes | No | No |
| Secure flash | 1024-bit OTP secure boot | 4096-bit OTP | 4096-bit OTP secure boot | |||
| Cryptography support | AES, SHA-2, RSA, ECC, RNG | AES-128/256, RSA Accelerator, SHA Accelerator, Random Number Generator (RNG), HMAC | AES-128/192/256, SHA-2, RSA, RNG, HMAC, Digital Signature | |||
| Deep sleep consumption | 10 µA, Yes | 5 µA | 5 µA | 20 µA, Yes | 20 µA | |
| Dimensions | ||||||
| Height | 6 mm | 5 mm | 18 mm | 7 mm | 5 mm | 5 mm |
| Width | 6 mm | 5 mm | 20 mm | 7 mm | 5 mm | 5 mm |
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