CH340 USB to TTL Serial Cable

CH340 is the new popular USB to UART converter/bridge for maker. It is being widely used in many development boards which includes:

• NodeMCU with CH340
• Maker UNO

This is a cable that embeds CH340 in it and extended the useful pins out to female headers.

The cable is the easiest way ever to connect to your microcontroller/WiFi router serial console port. Inside the big USB plug is the CH340 USB <-> Serial conversion chip and at the end of the 1-meter cable are four-wire:

• Red is power, or VCC, 5VDC
• Black is ground or 0V
• White is RXI input to USB's UART port, Receive input of USB's UART
• Green is TXO output of USB's UART port, Transmit output of USB's UART

The power pins provide 5V @ 500mA direct from the USB port and the RX/TX pins are��5.0V logic��for interfacing with the most common 5V logic level chipsets.

Because of the separated pin headers, this cable is ideal for powering and connecting up to the debug/login console on the��ESP32-CAM��as ESP32's IO pins are 5V tolerant. We have tested this USB to UART converter with ESP32-CAM and it works fine.

This is easier to use than an FTDI cable in many cases because the wires are separated. Note that we call this a "TTL cable" (since that's what they're called) but technically it's CMOS logic.

It will appear as COM port after being plugged into the computer/laptop's USB port and after driver installation (1st and one time only).