8GB Iono Pi with Raspberry Pi 4 Sfera Labs 8GB Iono Pi with Raspberry Pi 4 is a highly versatile I/O module that combines several digital and analog input lines with support for standard interfaces. The Iono Pi features a robust power supply with a wide voltage range (9÷28Vdc) capable of up to 4.0A output current at 5V to the Raspberry Pi board, a real-time clock with a lithium backup battery, and an embedded Microchip ATECC608A secure element chip.