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I need to interface a modular type temperature controller using Arduino. This is the datasheet of temperature controller

The datasheet mentioned like this, Protocol composition

My questions are, How can I interface( Reading/Writing parameters) to the controller using Arduino? Is there any library for achieve this communication?

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The first step is to talk with the sensor. For that you need a UART to RS232 converter of a UART to RS485 converter. A good one is the MAX232.

The second step is to find a library that support one of the protocols or write your own library. This can be achieved by searching on google.

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