$5 CH347 board is a USB 2.0 bridge to I2C, SPI, UART, JTAG, and GPIO - CNX Software
Usb To I2c/iic/spi/uart/ttl/isp Adapter Module Epp / Mem Parallel Port Converter For Serial Brush Debugging - Model Accessories - AliExpress
![Adafruit FT232H Breakout - General Purpose USB to GPIO, SPI, I2C [USB C & Stemma QT] : ID 2264 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits](https://cdn-shop.adafruit.com/970x728/2264-04.jpg "Adafruit FT232H Breakout - General Purpose USB to GPIO, SPI, I2C [USB C & Stemma QT] : ID 2264 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits")
Adafruit FT232H Breakout - General Purpose USB to GPIO, SPI, I2C [USB C & Stemma QT] : ID 2264 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
DLN-2-U2C USB-I2C/SPI/GPIO Adapter (in U2C-12 compatible mode)
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Amazon.com: CH341A Programmer USB to UART IIC SPI I2C Convertor Parallel Port Converter Onboard Operating Indicator Lamp Board Module : Industrial & Scientific
Devantech USB to UART, I2C, SPI, serial adapter (USB-ISS) | Acroname
Total Phase Beagle I2C/SPI/MDIO | Bus Protocol Analyzer
I2C / SPI Interface Tool "USB to I2C Professional" | Information transmission media for research and development TEGAKARI
I²C/SPI Interface Device - NI
Aardvark I2C/SPI Host Adapter | Anchor Electronics
CH341A Programmer Module USB to UART IIC SPI I2C TTL ISP EPP/MEM Converter | eBay
Amazon.com: WSDMAVIS 1Pcs CH341A USB to I2C IIC SPI ISP UART TTL Serial Adapter EPP/MEM Parallel Converter Module : Electronics
Devantect USB to I2C, SPI and Serial interface - RobotShop
U2C-12 USB-I2C/SPI/GPIO Adapter
/i/84418/products/2018-02-23T14%3A01%3A02.966Z-mgtnsy1_topview.jpg?1606306133 "MGTNSY1 - USB to (I2C/SPI/UART/GPIO/PWM/ADC) Cable from skoperst on Tindie")
MGTNSY1 - USB to (I2C/SPI/UART/GPIO/PWM/ADC) Cable from skoperst on Tindie
Devantec USB to I2C, SPI and Serial interface (Short Pin Headers) - RobotShop
![Adafruit FT232H Breakout - General Purpose USB to GPIO, SPI, I2C [USB C & Stemma QT] : ID 2264 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits](https://cdn-shop.adafruit.com/970x728/2264-06.jpg "Adafruit FT232H Breakout - General Purpose USB to GPIO, SPI, I2C [USB C & Stemma QT] : ID 2264 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits")
Adafruit FT232H Breakout - General Purpose USB to GPIO, SPI, I2C [USB C & Stemma QT] : ID 2264 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Uart,I2c,Spi Interface Usb To Serial Adapter Module - Buy Usb To Serial Adapter Module,Serial To Usb Adapter,Uart I2c Spi Interface Usb To Serial Adapter Product on Alibaba.com
PC to I2C/SPI/GPIO/ADC/PWM Adapter with USB interface
DLN-4S Multiprotocol Master & Slave Adapter
ALL IN 1 Multifunctional Full Speed USB to SPI/I2C/IIC/UART/TTL/ISP Serial Adapter Module RS232 RS485 Board For STC MCU DIY KIT|usb in|rs232 ttlusb to spi - AliExpress
Amazon.com: FTDI C232HM-DDHSL-0, Cable, Assembly; USB-MPSSE(SPI/I2C/Jtag); 3.3V; 250ma Output; 24AWG; 0.5m : Electronics
Amazon.com: YWBL-WH USB to CAN SPI I2C UART GPIO Interface Adapter Converter Dual Channel 2,/8/16 CH 0-5V Compatible with ZLG, Adapter : Electronics
Amazon.com: All in 1 USB for ISP Serial Adapter Converters SPI/I2C/IIC/UART/TTL : Electronics
Usb To I2c/iic/spi/uart/ttl/isp Adapter Module Epp / Mem Parallel Port Converter For Serial Brush Debugging - Model Accessories - AliExpress
![Adafruit FT232H Breakout - General Purpose USB to GPIO, SPI, I2C [USB C & Stemma QT] : ID 2264 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits](https://cdn-shop.adafruit.com/970x728/2264-10.jpg "Adafruit FT232H Breakout - General Purpose USB to GPIO, SPI, I2C [USB C & Stemma QT] : ID 2264 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits")
Adafruit FT232H Breakout - General Purpose USB to GPIO, SPI, I2C [USB C & Stemma QT] : ID 2264 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
