$5 CH347 board is a USB 2.0 bridge to I2C, SPI, UART, JTAG, and GPIO - CNX Software
USB-I2C/SPI/GPIO/PWM/ADC Interface | $19.10 to $89.40
Total Phase Aardvark I2c / SPI Host Adapter USB to I2c/spi Bridge for sale online | eBay
FT232H Breakout - USB-C to GPIO+SPI+I2C Qwiic
I2C vs SPI vs UART – Introduction and Comparison of their Similarities and Differences - Total Phase
Devantech USB to UART, I2C, SPI, serial adapter (USB-ISS) | Acroname
DLN-2 USB-I2C/SPI/GPIO Adapter
DLN-2-U2C USB-I2C/SPI/GPIO Adapter (in U2C-12 compatible mode)
Usb To I2c/iic/spi/uart/ttl/isp Adapter Module Epp / Mem Parallel Port Converter For Serial Brush Debugging - Model Accessories - AliExpress
Amazon.com: All in 1 USB for ISP Serial Adapter Converters SPI/I2C/IIC/UART/TTL : Electronics
Aardvark I2C/SPI Host Adapter | Anchor Electronics
Aardvark I2C/SPI Host Adapter - Total Phase
I²C/SPI Interface Device - NI
USB-I2C/SPI/GPIO Interface Adapter.
ViperBoard I2C/SPI/GPIO USB Interface Adapter Support
USB-ISS
I2C to SPI Click | Mikroe
DLN-4S Multiprotocol Master & Slave Adapter
Amazon.com: All in 1 CH341A USB to SPI I2C IIC UART TTL ISP Serial Adapter Module EPP MEM Converter for Serial Brush Debugging RS232 RS485 : Electronics
781964-03 - Ni - Interface Device, I2C/SPI, USB-8452
Amazon.com: WSDMAVIS 1Pcs CH341A USB to I2C IIC SPI ISP UART TTL Serial Adapter EPP/MEM Parallel Converter Module : Electronics
Total Phase Aardvark | USB to I2C and SPI Host Adapter
