Quelltext der Seite 4777 – RS485 Board (3.3V)/en

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'''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.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/4777 4777 – RS485 Board (3.3V)]
* [https://shop.jw-tech.eu/p/WSAL4777 WSAL4777 – RS485 Board (3.3V)]

== 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 ==
* [https://www.waveshare.com/wiki/RS485_Board_(3.3V) RS485 Board (3.3V) - Waveshare Wiki]
* Source revision: 69303
* Captured: 2026-08-29T08:43:31+00:00
* SHA-256: <code>f6b4ee175c9735c37b809a9832f818f1a7750cce3ab7228c6a590d9942c030fc</code>