Hi,
I'm working actually 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.
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