USB UART TTL Converter with CH340G 3.3V 5V USB-A Professional USB to UART converter (Universal Asynchronous Receiver-Transmitter) enabling bidirectional data transmission between a computer with a USB-A port and devices equipped with a serial interface. The module is based on the popular and reliable CH340G chip. The device emulates a virtual COM port in the operating system, allowing easy communication with microcontrollers. The module is fully compatible with popular development platforms. It works perfectly as a programmer for ESP8266, ESP32, Arduino, and Raspberry Pi. Key technical features * Control chip: CH340G * Communication interface: UART * Logic level voltage: 3.3V and 5V - selectable via a jumper * Computer connector: standard USB-A plug * Status indication: built-in LEDs (power, TX transmit, RX receive) * Additional pins: RTS (Request to Send) and CTS (Clear to Send) * Module dimensions: 59 mm x 24 mm Example applications * Programming microcontrollers without a built-in USB interface (e.g. for Arduino Pro Mini) * Uploading firmware to WiFi modules (for ESP8266, for ESP32) * Serial communication with single-board computers (for Raspberry Pi) * Diagnostics of network devices (routers, switches) via the console port * Reading data from sensors and modules equipped with a UART interface * Creating custom diagnostic interfaces in electronic projects Benefits of using the module * Voltage versatility - ability to work with 3.3V and 5V circuits thanks to the built-in jumper * Visual operation monitoring - LEDs indicate power and ongoing data transmission * Full flow control - exposed RTS and CTS pins enable hardware transmission control * Complete kit - the package includes the necessary jumper and 4 connection wires (female-female) * Easy installation - the module requires only the standard ch341ser driver (recommended for Windows systems) https://elecena.pl/product/30521290/konwerter-usb-uart-ttl-ch340g-3v3-5v-usb-a-programator-do-arduino-esp32 2026-07-21 https://elecena.pl/product/30521290/konwerter-usb-uart-ttl-ch340g-3v3-5v-usb-a-programator-do-arduino-esp32 2026-07-24 https://elecena.pl/product/30521290/konwerter-usb-uart-ttl-ch340g-3v3-5v-usb-a-programator-do-arduino-esp32 2026-07-26 https://elecena.pl/product/30521290/konwerter-usb-uart-ttl-ch340g-3v3-5v-usb-a-programator-do-arduino-esp32 2026-07-29 https://elecena.pl/product/30521290/konwerter-usb-uart-ttl-ch340g-3v3-5v-usb-a-programator-do-arduino-esp32 2026-08-01 https://elecena.pl/product/30521290/konwerter-usb-uart-ttl-ch340g-3v3-5v-usb-a-programator-do-arduino-esp32 2026-08-05 https://elecena.pl/product/30521290/konwerter-usb-uart-ttl-ch340g-3v3-5v-usb-a-programator-do-arduino-esp32 2026-08-07 https://elecena.pl/product/30521290/konwerter-usb-uart-ttl-ch340g-3v3-5v-usb-a-programator-do-arduino-esp32 2026-08-08 https://elecena.pl/product/30521290/konwerter-usb-uart-ttl-ch340g-3v3-5v-usb-a-programator-do-arduino-esp32 2026-08-30 https://elecena.pl/product/30521290/konwerter-usb-uart-ttl-ch340g-3v3-5v-usb-a-programator-do-arduino-esp32 2026-09-11