Waveshare 3.3V RS485 Module

This Waveshare RS485 board works at 3.3 V and connects a UART to an RS485 bus. Several Arduino, Raspberry Pi or ESP boards can thus be linked over longer distances on a two-wire bus, for example for Modbus.

For 5 V microcontrollers: Waveshare 5V RS485 Module

Recommended Accessories:

• Industrial USB to RS485 Converter
• Dupont Cable F-F 10cm 20 pieces

Features:

• SP3485 or MAX485 transceiver, printed 3485/485
• Bus connection A and B via screw terminal, pin header or modular jack
• Pin header to the microcontroller with VCC, GND, RO, DI and RSE (print partly hidden)
• RSE switches between transmit and receive
• Low power consumption

Application Examples:

• Modbus RTU with sensors and relay boards
• Linking several microcontrollers over longer distances
• Connecting RS485 devices to an ESP or Raspberry Pi

Documentation:

• Waveshare Wiki RS485 Board (3.3V)

Technical Data:

• Manufacturer: Waveshare
• Chip: SP3485 / MAX485
• Operating voltage: 3.3 V
• Interface: RS485 to TTL (UART)
• Bus connections: screw terminal A, B, pin header A, B, modular jack
• Logic connections: VCC, GND, RO, DI, RSE
• Dimensions: 41.7 × 16.5 × 17.5 mm
• Weight: 6 g

Scope of Delivery:

• 1× Waveshare 3.3V RS485 Module