Home Hi-Link CH340E USB to TTL Serial Converter Board + Jumper Wires

Hi-Link CH340E USB to TTL Serial Converter Board + Jumper Wires

SKU: HLK-Test-Kit
Sale price 4,15 €
incl. VAT
excl. VAT

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Hi-Link CH340E USB to TTL Serial Converter Board + Jumper Wires

Hi-Link CH340E USB to TTL Serial Converter Board + Jumper Wires

4,15 €

Specifications

  • Chip: CH340E (USB-to-Serial IC, no external crystal required)
  • USB Connector: Type-A Male (plug directly into PC or USB hub)
  • TTL Interface: 6-pin header — DTR, RXD, TXD, VCC, CTS, GND
  • Logic Level: Switchable 3.3V and 5V (via jumper or pad)
  • Baud Rate: Up to 2 Mbps
  • USB Standard: USB 2.0 Full Speed
  • Power Output: 3.3V / 5V selectable, max 500mA (bus-powered)
  • LED Indicators: TX and RX activity LEDs
  • PCB Dimensions: approx. 46 × 18 mm
  • Operating Temperature: -40°C to +85°C
  • Driver Support: Windows 7/8/10/11, macOS 10.9+, Linux (kernel built-in)
  • Jumper Wires Included: 2.54mm pitch Dupont, 5-pin, approx. 200mm length

Key Features

  • CH340E chip — no external crystal oscillator needed, more stable than CH340G in compact designs
  • Dual voltage support: select 3.3V or 5V to match your target device logic level without risk of damage
  • USB Type-A plug-in design — no additional USB cable needed, plugs directly into any USB port
  • TX/RX indicator LEDs for real-time data activity monitoring
  • Plug-and-play on Linux and modern macOS (no manual driver installation required)
  • Supports DTR pin for automatic bootloader reset on Arduino-compatible boards
  • Compact dongle form factor — lightweight and portable for field debugging
  • Bundled jumper wires allow immediate connection to target board without extra accessories
  • Works with all UART-based devices: microcontrollers, GPS modules, Bluetooth modules, industrial sensors
  • Bus-powered via USB — no external power supply needed

Applications

  • Flashing firmware to ESP8266 and ESP32 modules (NodeMCU, Wemos D1 Mini, etc.)
  • Programming Arduino Pro Mini, Arduino Nano (CH340-based or bootloader burning)
  • Debugging UART output from microcontrollers and SoC boards
  • Connecting GPS/GNSS modules (NEO-6M, NEO-7M) to PC for configuration
  • Interfacing HC-05/HC-06 Bluetooth modules for AT command configuration
  • Serial console access to Raspberry Pi or single-board computers
  • Configuring industrial RS-232/UART devices via PC terminal
  • Reading NMEA data streams from navigation sensors
  • Flashing OpenWRT firmware to router modules via serial console
  • General-purpose UART-to-USB bridging in prototyping and lab work

Package Includes

  • 1 × CH340E USB-TTL Converter Board (USB Type-A male plug, 6-pin TTL header)
  • 1 × 5-pin 2.54mm Dupont jumper wire set (approx. 200mm, female-to-female)
  • Note: No USB cable required — the board plugs directly into USB port
  • Note: CH340 driver is pre-installed on Linux; for Windows, download from wch.cn if not auto-detected

HLK-Test-Kit

FAQ

  • Q: What is the difference between CH340E and CH340G? A: The CH340E does not require an external crystal oscillator, making it more compact and slightly more stable. Both offer identical USB-to-TTL functionality, but CH340E is better suited for miniaturized boards.
  • Q: Do I need to install a driver on Windows? A: On Windows 10/11, the driver often installs automatically. If not, download the official CH340 driver from wch.cn (WCH official website) — it is free and takes under a minute.
  • Q: How do I select between 3.3V and 5V? A: The board has a jumper or solder pad to select VCC output voltage. Always match the logic level to your target device to avoid damaging it — ESP8266 and ESP32 require 3.3V.
  • Q: Can this board program an ESP32 or ESP8266? A: Yes. Connect TX→RX, RX→TX, GND→GND, 3.3V→3.3V, and DTR→EN (or IO0 for boot mode). The DTR pin enables automatic reset during flashing when used with esptool or Arduino IDE.
  • Q: Does it work on macOS without a driver? A: macOS 10.15 (Catalina) and later include a CH340 kernel extension. No manual install is needed in most cases.
  • Q: What baud rate does it support? A: Up to 2 Mbps, which covers all standard rates: 9600, 115200, 230400, 460800, 921600, etc.
  • Q: Is it safe to use with 3.3V-only devices? A: Yes, when set to 3.3V mode, both the TX output voltage and VCC pin output 3.3V, making it safe for ESP8266, ESP32, and other 3.3V-only devices.
  • Q: What is the DTR pin used for? A: DTR (Data Terminal Ready) is used to trigger automatic reset on Arduino and ESP boards during programming. Without DTR, you must manually press the reset button at the right moment.
  • Q: Can I power my target board from this adapter? A: The VCC pin can supply up to ~500mA from USB bus power. This is sufficient for most bare microcontroller modules, but not for boards with high-current peripherals.
  • Q: What is the difference between this board and a full USB cable with CH340? A: This dongle plugs directly into USB without a cable, which is more convenient. A dedicated cable is useful when you need distance between the PC and the target board.

1. General Shipping Information

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2.1 Germany Domestic Shipping

Shipping Method Order Value Cost Est. Delivery
Deutsche Post €0.00 - €50.00 €4.95 2-4 Business Days
Deutsche Post Over €50.00 Free 2-4 Business Days
DHL Paket
(Faster Delivery)
€0.00 - €50.00 €6.95 1-3 Business Days
DHL Paket
(Faster Delivery)
€50.00 - €100.00 €2.00 1-3 Business Days
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Available EU shipping destinations are shown at checkout based on your shipping address. For orders shipped to selected EU countries or regions outside Germany, we use FedEx Regional Economy.

Shipping Method Order Value Cost Est. Delivery
FedEx Regional Economy €0.00 - €100.00 €7.95 3-5 Business Days
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EU orders may be fulfilled from our Munich warehouse or, when applicable, from our Shenzhen warehouse depending on inventory availability. For EU member states, OpenELAB covers applicable import duties and taxes under DDP service where required.

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Region Shipping Method Order Value Cost Est. Delivery
Continental U.S.
(50 States)
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2.4 International Destinations Outside the EU

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Order Amount Shipping Cost
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Over €300.00 Free

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3.1 Munich Warehouse

For products stored in our Munich warehouse, we use Deutsche Post or DHL Paket for domestic deliveries within Germany. For selected EU destinations outside Germany, we use FedEx Regional Economy.

3.2 Arlington Warehouse

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3.3 Shenzhen Warehouse

For pre-order items or products fulfilled directly from our Shenzhen warehouse, we arrange reliable international shipping based on destination and inventory status. For EU member states, OpenELAB covers applicable import duties and taxes under DDP service where required.

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5. Customs, Taxes & Delivery Issues

5.1 Customs and Taxes

For EU Member States:
Whether shipped from Germany or China, OpenELAB covers applicable import duties and taxes under DDP service where required. Customers in EU member states should not be charged additional import duties or VAT upon delivery.

Important Notice for Non-EU Countries:
For destinations outside the European Union, such as Switzerland, Norway, and the United Kingdom, import duties, taxes, and customs fees may be charged by local authorities upon delivery. These fees are the responsibility of the recipient.

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6. VAT

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