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RS485 / RS422 shield for Raspberry Pi

a professional RS422 / RS485 shield with many options

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I'm working currently on a professional RS422/RS485 shield for the Raspberry Pi. I wasn't satisfied with the shields on the market. They are very simple and have some disadvantages. My shield comes with the following features:

- RS422 (full duplex) support
- RS485 (half duplex) support
- galvanic isolation between PI and interface
- indicator leds for RX and TX activity
- switchable pull-up, pull-down and terminal resistor
- different modes for send/receive switching (Auto, GPIO, always transmitter, always receiver)
- Auto switching via monoflop
- all options adjustable via DIP switches

I'm curious about your feedback.

Application Note ModBus Rev A.pdf

How to use MODBUS RTU with this RPI HAT

Adobe Portable Document Format - 126.48 kB - 08/29/2018 at 09:20

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Application Note DMX512 Rev C.pdf

How to use DMX512 and RDM with this RPI HAT

Adobe Portable Document Format - 226.87 kB - 01/15/2018 at 13:27

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Adobe Portable Document Format - 210.91 kB - 09/01/2017 at 16:35

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Datasheet RS485 shield Rev A.pdf

Datasheet and DIP switch configuration

Adobe Portable Document Format - 221.51 kB - 09/01/2017 at 16:34

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