PiSquare is a RP2040 and ESP-12E Based Raspberry Pi HAT ^^ PiSquare let you connect as many HATs you want to without stacking it on Raspberry Pi whether it is SPI, I2C or SPI HATs ^^ It uses socket programming to communicate multiple ("n" numbers of HATs) Raspberry Pi HATs wirelessly ^^ USB Type C port for power and data (and for reprogramming the Flash) ^^ Exposes 25 multi-function 3.3V general purpose I/O (GPIO) where 21 GPIO are digital-only and 3 are ADC capable