hwhardsoftWe've used 2 shields and 2 Raspberry Pi to test the RS422 (ful duplex) function of the shield. You can connect 2 Pis over a long distance (>1km) via the RS422 mode ...
RS422 test
A project log for RS485 / RS422 shield for Raspberry Pi
a professional RS422 / RS485 shield with many options
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