Specifications:
NodeMCU based on ESP-WROOM-32 module
ESP32 is a dual core 32-bit processor with built-in 2.4 GHz Wi-Fi and Bluetooth
Wi-Fi:802.11 b/g/n
Bluetooth V4.2 – Supports BLE and Classic Bluetooth
520KByte RAM
3.3V Operating voltage range
Maximum Operating Frequency : 240 MHz.
Analog Input Pins: 12 bit, 18 channels.
Based on ESP32 DEVKIT DOIT
30 GPIO Version
4MByte flash memory
In breadboard-friendly breakout
USB micro B for power and Serial communication, use to load program and serial debugging