Original espressif ESP32-DevKitC development board, posts from London UK sold by UK LTD company and not Bulgaria company that avoids tax.

More info at esp32UK site!

http://esp32.co.uk/index.php/forum/documentation/5-documentation

http://www.esp32.co.uk/documents/esp32-devkitc_getting_started_guide_en.pdf

http://www.esp32.co.uk/documents/esp-now_user_guide_en.pdf

http://www.esp32.co.uk/documents/esp32_technical_reference_manual_en.pdf

http://www.esp32.co.uk/documents/esp32_pinout_v1_0.pdf

http://www.esp32.co.uk/documents/esp32_datasheet_en.pdf

http://www.esp32.co.uk/documents/esp32_chip_pin_list_en_0.pdf

Properties

Key Features	240 MHz dual core Tensilica LX6 microcontroller with 600 DMIPS Integrated 520 KB SRAM Integrated 802.11BGN HT40 Wi-Fi transceiver, baseband, stack and LWIP Integrated dual mode Bluetooth (classic and BLE) 16 MByte flash 2.2V to 3.6V operating voltage -40°C to +125°C operating temperature On-board PCB antenna / IPEX connector for external antenna
Sensors	Ultra low noise analog amplifier Hall sensor 10x capacitive touch interface 32 kHz crystal oscillator
32x GPIO	3 x UARTs, including hardware flow control 3 x SPI 2 x I2S 12 x ADC input channels 2 x DAC 2 x I2C PWM/timer input/output availabe on every GPIO pin OpenOCD debug interface with 32 kB TRAX buffer SDIO master/slave 50 MHz Supports external SPI flash up to 16 MB SD-card interface support
Security Related	WEP, WPA/WPA2 PSK/Enterprise Hardware accelerated encryption: AES / SHA2 / Elliptical Curve Cryptography / RSA-4096
Performance	Supports sniffer, station, softAP and Wi-Fi direct modes Max data rate of 150 Mbps@11n HT40, 72 Mbps@11n HT20, 54 Mbps@11g, and 11 Mbps@11b Maximum transmit power of 19.5 dBm@11b, 16.5 dBm@11g, 15.5 dBm@11n Minimum receiver sensitivity of -98 dBm 135 Mbps UDP sustained throughput 2.5 μA deep sleep current

Hybrid Wi-Fi & Bluetooth

ESP32 can perform as a complete, standalone system or as a slave device to a host MCU to reduce communication stack overhead on the main application processor. ESP32 can interface with other systems to provide Wi-Fi and Bluetooth functionality through the SPI / SDIO or I2C / UART interfaces.

Ultra Low Power Management

Engineered for mobile devices, wearable electronics and the Internet of Things (IoT) applications, ESP32 achieves ultra low power consumption with a combination of several proprietary technologies. The state-of-the-art power saving features include fine resolution clock gating, power modes, and dynamic power scaling.