CH340E – USB-UART converter for 0.99USD

News2017-10-31
Auhtor: Petr Šrámek

If you like arduino boards with ATmega328, SAMD21 or ESP8266, you need USB-UART converter with DTR pin. The DTR pin is needed for uploading of your code. DTR is connected to reset pin of microcontroller.

cnx-software share a news about very cheap and small USB-UART converter with DTR pin – CH340E.

The dimension of board is only 16x16mm, it contains microUSB connector and 6 pins (5V, 3.3V, GND, TX, RX a DTR). Everything what you need for your programming.

The communication speed is tested up to 150 000 Bd.

You can buy the board on https://www.aliexpress.com/item/1PCS-CH340E-USB-to-TTL-Serial-Converter-5V-3-3V-Universal-Not-need-switching-Model-BTE17/32821571106.html

Shared from https://www.cnx-software.com/2017/10/31/wch-ch340e-is-a-tiny-10-pin-serial-to-usb-chip/

Share the article:
Show your
Maker soul!
Buy a T-Shirt
Coffee for Chiptron
Give a boost to the next article

Related Articles

USB-UART converter with FT230XS and external 3.3V power supply

Articles2015-12-25

You can buy a lot of USB-UART converters e.g. with FT232, CH340 or CP2102. Each of USB-UART converters has some advantages or disadvantages. Some doesn’t have drivers inside kernel (linux) and/or windows. Another has a problem with faster communications. I…

How I was looking for a suitable module on Ali, but ended up finding completely different ones that I also really need.

News2025-08-04

I need a simple module – a USB-C connector (it could be without it), a charging chip for a LiPo battery on the board, and an output step-down (or LDO) with a voltage of 3.3V and a current of at…

USB-C, myths and nonsense.

Staré nabíjecí adaptéry
Articles2025-12-12

An article about USB-C was published on HN, and I simply have to respond. Besides a few inaccuracies, there has also been a wave of nonsense and myths on social media. The article on HN is behind a paywall, so…

3D printed weather station box with radiation shield for AirBoard/Meteo Mini and SEN55 sensor.

Articles2025-07-08

The article could be titled “How I Enhanced a 3D-Printed Box with a Radiation Shield for a Weather Station with the SEN5x Sensor and Air Board Controller.” This would perfectly capture my effort. I improved the box by adding space…

I didn’t expect that. I can throw away a third of my USB-C cables. They lack the connected signals, and I found out thanks to this tester.

Tester kabelů - USB-A i B, USB-C, Lightning a další
News2025-09-16

Who hasn’t experienced this? You need to quickly charge your phone, plug it in, and after an hour, there’s only a 10% increase. Or you want to transfer data to your computer, but it doesn’t work? What’s the problem? Maybe…