Processor
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Short name | ESP32 | ESP8266 | STM32F103C8T6 | ||
|---|---|---|---|---|---|
| Website | espressif.com/... | espressif.com/... | raspberrypi.org/... | arduino.cc/... | www.st.com/... |
| Release date | 2016 | 2014 | Feb. 29th 2016 | 2007 Jun 01 | |
| Product details | |||||
| CPU | Tensilica Xtensa LX6 32 bit Dual-Core @ 160 / 240Mhz | Tensilica LX106 32 bit @ 80 MHz (up to 160 MHz) | 1.2GHz 64-bit quad-core ARMv8 | 16MHz ATmega328P | 32-bit ARM Cortex M3 72MHz max |
| Coprocessor | ULP | USB Bridge | |||
| RAM | 520 KB | 50 KB less than | 1 GB DDR2 | 2 KB | 20 kb |
| ROM (Flash) | 448 KB | 0 use external SPI flash | 0 SD Card | 32 KB | 64 Kb or 128 Kb |
| UART | 3 | 2 | 1 | 1 | 3 USARTs (ISO 7816 interface, LIN, IrDA capability, modem control |
| SPI | Yes 4 | Yes 2 | Yes 11 | Yes 1 | Yes 2 |
| Wi-Fi | Yes 802.11b/g/n | Yes 802.11b/g/n (max 65Mbps) | Yes 802.11n | No | No |
| Bluetooth® | Yes 4.2 BR/EDR + BLE | No | Yes 4.1 BLE | No | No |
| USB Host | No | No | Yes 2 | No | No |
| Ethernet (LAN, RJ45) | Yes 10/100Mbps | No | Yes 10/100 | No | No |
| RTC Memory | 16 KB | No | No | ||
| External SRAM | 8 MB up to | ||||
| External Flash | 16 MB up to | 16 MB up to | |||
| ESP-MESH | Yes | Yes | No | No | No |
| CAN | Yes v2.0 | No | No | No | Yes |
| GPIO | 34 | 17 (up to) | 40 | 14 | 80 (up to) |
| Hall effect sensor | Yes | No | No | No | No |
| Temperature sensor | Yes | No | No | No | Yes |
| Touch sensors | 10 | No | No | No | |
| I²C | Yes up to 2 | Yes up to 1 | Yes 1 | Yes 1 | Yes up to 2 |
| I2S | 2 | 2 | 0 | 0 | 1 |
| ADC | Yes 12 bit SAR ADC up to 18 channels | Yes 10 bit | No | No | Yes 2 x 12-bit, 1 μs A/D converters (up to 16 channels) |
| DAC | Yes 8 bit up to 2 channels | No | No | No | Yes |
| PWM | Yes up to 8 | Yes 4 | Yes 4 | Yes 6 | Yes 37 |
| SDMMC | Yes | No | Yes | No | No |
| RMT (remote control) | Yes | No | No | No | No |
| LCD Interface | No | No | Yes | No | No |
| Camera Interface | No | No | Yes | No | No |
| Deep sleep consumption | 10 µA, Yes | 20 µA, Yes | 1 Yes | 4.3 µA, Yes | 1 Yes |
| Security | |||||
| Secure flash | 1024-bit OTP secure boot | No | |||
| Cryptography support | AES, SHA-2, RSA, ECC, RNG | No | |||
| Dimensions | |||||
| Height | 6 mm | 5 mm | 56.5 mm | 53.3 mm | |
| Width | 6 mm | 5 mm | 85.6 mm | 68.6 mm |
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