What it is
MAX485 TTL to RS485 Converter Module for Arduino, ESP32, STM32 & Raspberry Pi converts TTL UART serial signals into RS485 differential communication for longer cable runs and better noise immunity. Built around the MAX485, it is suited to half-duplex links for industrial sensors, smart meters, motor controllers, PLC-style devices, and Modbus-style automation or remote monitoring projects.
Pins
Refer to the silkscreen labels on the board/module and the listing photos for exact pin names. Pinout and power labels can vary by module revision, so verify the markings on your board and use the MAX485 datasheet only as chip-level reference.
Technical Specifications
| Specification | Details |
|---|---|
| Product type | TTL to RS485 converter module |
| Main chip | MAX485 |
| Host interface | UART / TTL serial |
| Bus interface | RS485 differential communication |
| Communication mode | Half-duplex |
| Compatible platforms | Arduino, ESP32, STM32, Raspberry Pi |
| Operating voltage | Varies by module revision |
| Typical uses | Industrial sensors, smart meters, motor controllers, PLC-style devices, distributed sensor networks, Modbus-style projects |
Frequently Asked Questions
What does a MAX485 TTL to RS485 converter module do?
It converts TTL UART serial data from a microcontroller into RS485 differential communication for longer cable runs and better noise immunity. This module is intended for half-duplex serial links.
Can I use this MAX485 module with Arduino, ESP32, STM32, or Raspberry Pi?
Yes. It is designed to bridge a host UART or serial interface to an RS485 bus for those platforms. Check the silkscreen pinout and power labels on your exact module revision before wiring.
Is this board for UART, I2C, or SPI?
This board is for UART serial conversion to RS485. It is not an I2C or SPI interface module.
What is this RS485 converter used for?
Typical uses include industrial sensors, smart meters, motor controllers, PLC-style devices, distributed sensor networks, wired control systems, and Modbus-style projects. RS485 is useful where cable length and electrical noise are concerns.
Where can I find the MAX485 module pinout or datasheet details?
Use the silkscreen labels on the module and the listing photos for the exact pin names on your board revision. The MAX485 datasheet explains the transceiver function, but the module-level pinout should always be verified from the board itself.