USB / I2C+UART converter
The circuit board is equipped with Microchip MCP2221 converter.
It enables communication of host computer, equipped of USB, with
instrumentation bus I2C, UART or SMB.
USB device uses the I2C (SMBus) in the "Master" mode , ie. allows you
to read registers of "Slave"circuits , or to write into them.
Microchip provides for communication
programs and drivers for OS
Windows, Apple, Linux a Android. Windows driver is also part of own
program for communication with some types of I2C circuits:
Similarly, the USB device may communicate with the chips that have
asynchronous UART, e.g. by the driver of "Virtual COM
Port" in Windows OS.
Pads in addition to choice 5V or 3.3V power supply lets you connect LEDs
for indication of transmission. 30x19mm plate fitted with a USB
connector mini costs 5Eur.