With many Modbus slaves you also need to be careful not to poll the slaves too quickly but the WattNode is more robust than most slaves are in this regard.
Most serial port drivers today should not have a problem achieving this as long as the entire message is passed to the serial port driver in one call. However, the WattNode is more tolerant and allows a gap between bytes of nearly the minimum silent interval. To strictly conform to the standard, the maximum time between sending any two successive bytes that belong to the same message should not exceed 1.5 character times (i.e. With the Modbus RTU protocol, the start of a message begins with the first byte sent after a minimum silent interval (i.e.
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