This ESP32 is a powerful dual core microcontroller with on-board Wi-Fi and Bluetooth capability and it can be programmed with Arduino IDE (free to download and install)/ It has 512kB of RAM, 4MB of flash memory and heaps of IO pins with features like 12 bit ADC, 8 bit DAC, I2S, I2C, touch sensor and SPI. This is the next step up if a standard AVR based Arduino isn’t powerful enough to do what you need. Features: RAM: 512KB Flash Memory: 4MB IO pins: on-board with features like 12 bit ADC, 8 bit DAC, I2S, I2C, touch sensor and SPI 3.3V operating and IO voltage 5V-3.3 converter onboard for operation from USB Arduino Addon available (installation required) Micropython firmware available