Microcontrollers

ESP8266
The ESP8266 is a microcontroller by Espressif. 

 Properties 

 

 

 

 Property 

 Value 

 

 

 Nominal Voltage 

 3.3 V 

 

 

 CPU 

 

 32 bit CPU 

 

 

 

 Connectivity 

 2.4 GHz Wifi, Bluetooth 

 

 

 ADC 

 1 10-bit ADC with max 1.0 Volt 

 

 

 Pins 

 GPIO Pins, I2C, SPI, UART 

 

 

 

 

 

 

 

 Boards 

 NodeMCU 1.0 

 The NodeMCU 1.0 is a popular development board for working with the ESP8266 (Often with the variant ESP-12E). It has the following properties: 

 

 A USB interface (usual Micro USB) 

 USB-To-UART Chip (CH340 or CP2102) 

 Voltage regulator for 3.3 V 

 Reset and Flash button 

 Breadboard friendly pins 

 4MB Flash memory 

 

  

Rasberry Pi Pico
Pinout 

 A good website to look at the pinout: https://pico.pinout.xyz/ 

  

ESP32
The Family 

 The ESP32 is a whole family of microcontrollers. Depending on the type, they differ from e.g. CPU or Wi-Fi capabilities. 

 Overview 

 

 

 

 Chip 

 CPU 

 Wi-Fi 

 Bluetooth 

 USB 

 

 

 

 

 ESP32 

 1–2× Xtensa, 240 MHz 

 Wi-Fi 4 

 BT Classic + BLE 

 ❌ 

 

 

 ESP32-S2 

 1× Xtensa, 240 MHz 

 Wi-Fi 4 

 ❌ 

 USB OTG 

 

 

 ESP32-S3 

 2× Xtensa LX7, 240 MHz 

 Wi-Fi 4 

 BLE 5 

 USB OTG 

 

 

 ESP32-C2 

 1× RISC-V 

 Wi-Fi 4 

 BLE 

 ❌ 

 

 

 ESP32-C3 

 1× RISC-V, 160 MHz 

 Wi-Fi 4 

 BLE 5 

 USB Serial/JTAG 

 

 

 ESP32-C5 

 1× RISC-V, 240 MHz 

 Wi-Fi 6, 2.4 + 5 GHz 

 BLE 5.2 

 USB Serial/JTAG 

 

 

 ESP32-C6 

 1× RISC-V, 160 MHz 

 Wi-Fi 6 

 BLE 5 

 USB Serial/JTAG 

 

 

 ESP32-H2 

 1× RISC-V, 96 MHz 

 ❌ 

 BLE 5 

 USB Serial/JTAG 

 

 

 ESP32-P4 

 RISC-V 

 ❌ 

 ❌ 

 USB OTG 

 

 

 ESP32-S31 

 2× RISC-V, 320 MHz 

 Wi-Fi 6 

 BT 5.4 

 USB OTG