TTL to RS485 Converter Module | UART Serial Level Conversion

TTL to RS485 Converter Module – UART Serial Level Conversion

Upgrade your embedded projects and serial communication setups with this compact TTL to RS485 Converter Module. Designed for seamless bidirectional level conversion between TTL (3.3V/5V) UART interfaces and RS485 differential signal lines, this module is an essential component for engineers, hobbyists, and developers working with microcontrollers, PLCs, sensors, and industrial communication systems.

With automatic flow control and wide operating temperature range (-40°C to +85°C), this module is built for dependable performance in both desktop and field environments. Its ultra-compact SMD form factor (just 1.5 × 4.3 cm, 1.69g) makes it easy to integrate into tight enclosures or breadboard prototypes.

Key Features

• Bidirectional Conversion: Effortlessly converts TTL UART signals to RS485 and back, enabling reliable long-distance serial communication.
• Dual Voltage Support: Compatible with both 3.3V and 5V power supplies — works with a wide range of microcontrollers including Arduino, ESP32, STM32, and Raspberry Pi.
• Automatic Flow Control: Built-in automatic direction switching removes the need for manual RTS/CTS signal management.
• Wide Temperature Range: Operates reliably from -40°C to +85°C, suitable for industrial and outdoor applications.
• Ultra-Compact SMD Design: Measures just 1.5 × 4.3 cm and weighs only 1.69g — perfect for space-constrained builds.
• Customizable Quantity: Available in 1-piece, 5-piece, or 10-piece sets to match your project scale.

Specifications

What's in the Box

• TTL to RS485 Converter Module(s) (quantity as selected: 1pcs / 5pcs / 10pcs)

Perfect For

• Arduino, ESP8266/ESP32, STM32, and Raspberry Pi projects
• PLC and industrial controller interfacing
• Long-distance serial data transmission
• Smart home automation and sensor networks
• DIY electronics and prototyping

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Frequently Asked Questions

Q: What does the TTL to RS485 Converter Module do?

A: This module converts TTL-level UART serial signals (3.3V or 5V) to RS485 differential signals and vice versa. This allows microcontrollers and computers to communicate over RS485 networks, which support longer cable runs and multi-device communication on a single bus — making it ideal for industrial, home automation, and embedded applications.

Q: Is this module compatible with Arduino and Raspberry Pi?

A: Yes. The module supports both 3.3V and 5V supply voltages, making it fully compatible with Arduino (5V), Raspberry Pi (3.3V), ESP32, STM32, and most other popular development boards. Simply connect the TTL UART pins (TX, RX, GND, VCC) and you're ready to communicate over RS485.

Q: Does this module require manual flow control configuration?

A: No. The module features automatic flow control, which means it automatically detects the direction of data transmission and switches the RS485 driver accordingly. There is no need to manually toggle an RTS or DE/RE pin, simplifying your wiring and firmware.

Q: How many units can I order at once?

A: The module is available in quantities of 1 piece, 5 pieces, or 10 pieces. Simply select your preferred quantity from the options menu. Bulk quantities are ideal for project development, prototyping batches, or stocking spare components.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.