Frédéric Blanc » ESP32

h1. Wiki

h2. Overview 

ESP32 is a series of low-cost, low-power system on a chip microcontrollers with integrated Wi-Fi (802.11 b/g/n) and dual-mode Bluetooth(v4.2 BR/EDR and BLE). The ESP32 series employs a Tensilica Xtensa LX6 microprocessor in both dual-core and single-core variations and includes in-built antenna switches, RF balun, power amplifier, low-noise receive amplifier, filters, and power-management modules. ESP32 is created and developed by Espressif Systems, a Shanghai-based Chinese company, and is manufactured by TSMC using their 40 nm process. It is a successor to the ESP8266 microcontroller. 

https://www.espressif.com/en/products/hardware/esp32/overview

h2. Hardware

h3. Core

*CPU*: Xtensa dual-core (or single-core) 32-bit LX6 microprocessor, operating at 160 or 240 MHz and performing at up to 600 DMIPS

*Memory*: 520KiB SRAM

*Power* management: 5uA deep sleep current

h3. Wi-Fi

Wi-Fi: 802.11 b/g/n

h3. Bluetooth

Bluetooth v4.2 BR/EDR and BLE

h3. ADC

!{width: 50%}esp32_adc001.png!

Features

• Two SAR ADCs, with simultaneous sampling and conversion

• Up to five SAR ADC controllers for different purposes (e.g. high performance, low power or PWDET /PKDET).

• Up to 18 analog input pads

• One channel for internal voltage vdd33, two for pa_pkdet (available on selected controllers)

• Low-noise amplifier for small analog signals (available on one controller)

• 12-bit, 11-bit, 10-bit, 9-bit configurable resolution

• DMA support (available on one controller)

• Multiple channel-scanning modes (available on two controllers)

• Operation during deep sleep (available on one controller)

• Controlled by a ULP coprocessor (available on two controllers)

h2. Example

WebSockets for awesome on the ESP8266

https://www.youtube.com/watch?v=8ISbmQTbjDI

https://github.com/cnlohr/colorchord