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Warning, modbus_receive returns 0 when a query is ignored. - function removed from TCP and RTU code and from backend structure - updated documentation - updated examples
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These new functions seem clearer than the recent modbus_receive_from function IHMO. This change fixes the bandwidth-server-many-up program.
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Split the original modbus_receive function in two functions to avoid the strange -1 value to ignore the sockfd argument.