| Specifications | ESP8266 | ESP32 |
|---|---|---|
| MCU | Xtensa Single-core 32-bit L106 | Xtensa Dual-Core 32-bit LX6 with 600 DMIPS |
| 802.11 b/g/n Wi-Fi | Yes, HT20 | Yes, HT40 |
| WiFi Security | ? | WEP, WPA/WPA2 PSK/Enterprise |
| Hardware Accelerated Encryption | ? | AES/SHA2/Elliptical Curve Cryptography/RSA-4096 |
| Bluetooth | None | dual-mode: Bluetooth 4.2 BLE or classi |
| Typical Frequency | 80 MHz | 240 MHz |
| SRAM | 160 KB | 520 KB |
| Flash | SPI Flash, up to 16 MB | SPI Flash, up to 16 MB, memory mapped to CPU code space. |
| GPIO | 17 | 36 |
| Hardware/Software PWM | None/8 channels | 1/16 channels |
| SPI/I2S/I2C/UART | 2/1/2/2 | 3/2/2/3 |
| ADC | 10 bit | 12-bit, 18 channels |
| DAC | None | 2 |
| CAN | None | ? |
| Ethernet MAC Interface | None | 1 |
| Touch Sensor | None | Yes |
| Temperature Sensor | None | yes |
| Working Temperature | -40 C - 125 C | -40 C - 125 C |
| Operating Voltage | ? | 2.3V to 3.6V C |
| Power Consumption | 77 μA | 5 μA power consumption in Deep-sleep |
Reference: http://espressif.com/en/products/hardware/esp32/overview
