Description
Essential USB to TTL Serial Adapter Module

This high-quality USB-to-UART serial converter board offers a reliable and cost-effective solution for microcontrollers, embedded systems, and various serial communication debugging needs. Available in two optional high-performance specification versions to perfectly match your project requirements.

Technical Specifications & Features

• Dual Voltage Support: Built-in 5V and 3.3V logic level tolerance. Easily switch between levels using the onboard jumper cap.

• Hardware Flow Control: Fully supports RTS/CTS and DTR/DSR hardware flow control for precise data streaming.

• Wide Baud Rate Range: Supports reliable data transmission speeds from 300 bps up to 3 Mbps (varies by variant selection).

• Industrial Standard: Operates stably in harsh environments within a wide temperature range of -40°C to +85°C.

• Status Indicators: Equipped with onboard power and TX/RX data transmission indicator LEDs for real-time status monitoring.

Optional Specification Variants

1. Premium Industrial Stable Edition (Model: FT232RL Chip)

   • Features maximum anti-interference capability and high-precision flow control.

   • Full modem interface pins breakout including TXD, RXD, DTR, RTS, CTS, and DSR.

   • Ideal for automatic program uploading and flashing.

2. Budget-Friendly Highly Cost-Effective Edition (Model: PL2303 Chip)

   • An ultra-affordable choice for general debugging and everyday MCU communication.

   • Compact design with steady performance for mainstream logic Applications

     • Microcontroller Flashing: Program downloading for popular development boards such as Arduino Pro Mini, ESP32, ESP8266, and STM32 series.

     • Device Debugging: Accessing the Linux console terminal backend for routers, network switches, Raspberry Pi, and other development boards.

     • Industrial Communication: Connecting legacy industrial instrumentation, weighing scales, and PLCs.

       ⚠️ IMPORTANT USAGE NOTE (PLEASE READ BEFORE USE)

       Voltage Matching Warning: Most modern microcontrollers (like ESP32 and STM32) are highly sensitive and NOT 5V tolerant. Before connecting the module to your development board, YOU MUST place the jumper cap on the 3.3V pins. Failure to do so will apply 5V logic level to your MCU and may permanently burn out the main chip pins! Always double-check your connection: Cross-wire the data lines (Module TX connects to MCU RX; Module RX connects to MCU TX) and ensure the GND pins are securely common-grounded.