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USB-UART CH340 converter board
USB-UART CH340 converter board

This small USBUART adapter converts USB communication into UART (serial) communication, and everything you might need is already on this small board. In addition to the classic UART pins that are arranged in the standard layout: DTR, RXD, TXD, VCC, CTS, GND, other pins available of the CH340 chip are also available on header: RS232, RI, DCD, DSR, RST and CTS. Indication LEDs show activity on RXT and TXD lines, and a 500mA fuse protects this programmer, the USB port of the computer that is connected, and other devices connected to it from damage.

Additionally, there is a voltage regulator and a switch on the board, and it is possible to choose the output voltage of 3.3V or 5V, depending on the device you are using. The logic of the UART signal is always 3.3V, but don’t worry, 5V devices will work with 3V3 UART logic without any problems. Use a USB-C cable to connect.

CONNECT programmer
CONNECT programmer

CONNECT programmer is designed to allow extremely simple programming of boards based on ESP8266 and ESP32 microcontrollers. It contains all the necessary electronics and logic so that programming can be done by plugging USB cable into CONNECT programmer and connecting CONNECT programmer to the programming header. Electronics that take care of timing and signal sequence are also on board, so it puts the ESP uC into bootloader mode.

ESP programming header can be found boards made by Soldered based on ESP8266 or ESP32 microcontrollers that do not have a USB-UART converter, but this programmer can be used for any other ESP32 / ESP8266 board as well.


IC: CH340
Pin layout: GPIO0, RESET, RX, TX, 3V3, GND
LEDs: RX, TX, power
• Dimensions: 38 x 22 mm

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