Modbus RTU RS485

Runtime
sallos
2014-10-11
2014-10-21
  • sallos

    sallos - 2014-10-11

    Hi,

    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?

     
  • mbruck

    mbruck - 2014-10-21

    Hi!

    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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