4777 – RS485 Board (3.3V)/en
Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.
Summary
The Waveshare RS485 communication board uses the on-board SP3485 transceiver and is powered at 3.3 V. It provides an RS485 A/B interface via pin headers and terminals, with UART connection.
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Technical overview
- On-board chip: SP3485 as the RS485 transceiver
- Supply voltage: 3.3 V
- Interfaces: RS485 (A/B) and UART
- Two connection options for the RS485 lines: black pin header row (e.g., using DuPont cables) and blue screw terminals (e.g., using twisted pair or ordinary wire)
- Both variants connect to the same RS485 A/B interfaces; the difference is only the mechanical connection type
- Category: Modules, RS232/RS485/CAN
- Brand: Waveshare
Notes and version constraints
- The source contains no explicit commands, prices, warranty, or safety statements; none were added.
- Exact pinout, baud rate, and compatibility with specific controllers are not stated in the source document and require manual confirmation.
- Version-specific steps are missing from the provided text and should be verified against the current user manual before deployment.
Source and revision record
- RS485 Board (3.3V) - Waveshare Wiki
- Source revision: 69303
- Captured: 2026-08-29T08:43:31+00:00
- SHA-256:
f6b4ee175c9735c37b809a9832f818f1a7750cce3ab7228c6a590d9942c030fc