DIYables DIYables TTL to RS485 Converter Module Hardware Auto Flow Control 3.3V 5V Bidirectional UART RS485 Adapter 128 Devices for Arduino ESP32 Raspberry Pi, 5 Pack
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Quick Overview
This DIYables TTL to RS485 converter module features hardware auto flow control, automatically managing RS485 bus direction without software RTS control. This eliminates manual direction switching and simplifies firmware for bidirectional UART to RS485 conversion.
The module supports both 3.3V and 5V power supply, making it compatible with 3.3V ESP32 and 5V Arduino boards without additional level shifting. It allows up to 128 devices on a single RS485 bus, enabling large multi-machine communication networks for industrial automation, data acquisition, and remote monitoring. Onboard RXD and TXD LED indicators provide real-time monitoring of send and receive status, and the module supports hot swapping without signal lockup or dead signal conditions.
This listing includes 5 TTL to RS485 converter modules, ideal for Arduino, ESP32, ESP8266, Raspberry Pi, PLC, and industrial UART to RS485 network and Modbus applications.
Key Features
- Hardware Auto Flow Control — Automatically manages RS485 bus direction without software RTS control, simplifying firmware for bidirectional UART to RS485 conversion
- Dual Voltage Compatible — Supports both 3.3V and 5V power supply for 3.3V ESP32 and 5V Arduino boards without additional level shifting
- Multi-Device Bus Support — Allows up to 128 devices on a single RS485 bus for large multi-machine communication networks
- RXD/TXD Signal Indicators — Onboard LED indicators for real-time monitoring of send and receive status
- Hot-Swap Support — Supports hot swapping without signal lockup or dead signal conditions
- Simple 4-Pin UART Interface — GND, RXD, TXD, VCC pins plus A+/B- RS485 terminals for quick wiring
- Wide Compatibility — Works with Arduino, ESP32, ESP8266, Raspberry Pi, and PLC systems
- 5-Pack Value Set — Includes 5 TTL to RS485 converter modules for industrial UART to RS485 network and Modbus applications
SPECIFICATION
| Specification | Value |
|---|---|
| Product Type | TTL to RS485 Converter Module |
| Flow Control | Hardware automatic (no software RTS control) |
| Operating Voltage | 3.3V or 5V |
| Max Devices on Bus | Up to 128 devices |
| Interface | UART (GND, RXD, TXD, VCC) to RS485 (A+, B-) |
| Indicators | RXD and TXD status LEDs |
| Hot-Swap Support | Yes |
| Package Quantity | 5 pieces |
| Compatibility | Arduino, ESP32, ESP8266, Raspberry Pi, PLC |
| Applications | Industrial UART to RS485 networks, Modbus communication, data acquisition, remote monitoring |
Tutorials
COMPATIBLE HARDWARE
- Arduino boards (UNO, Mega, Nano, etc.) — Hardware Serial or SoftwareSerial UART
- Arduino Uno R4 WiFi/Minima — Serial communication pins
- ESP32 development boards — UART pins (HardwareSerial)
- ESP8266 boards (NodeMCU, Wemos D1, etc.) — Serial or SoftwareSerial
- Arduino Nano ESP32 — Hardware Serial pins
- Raspberry Pi (all models) — UART GPIO or USB-to-TTL adapter
- PLC systems — RS485 Modbus network integration
- Any microcontroller with UART — TTL serial to RS485 conversion
