iam searching for a MODBUS RTU Lib with RS485 Support.
I have an TTL -> RS485 converter on the Raspi, but i must switch the send/recv by a output.
The Converter is standart at recv an wen the Modbus Master sende they musst switch it.
Have anyone a idear?
Long time I'm using simple transistor + 75176 IC, bit I believe it can be also max486. It switch automatically independent of speed (I test it with 230kbs and it work). If you able to make your pcb I can send you schematic if you like.
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