A couple of minor issues.

[ramiropolla]

This always evaluates to true:

EmonLibCM/emonLibCM.cpp

Lines 371 to 375 in 23ca81e

	if (channel != 0 || channel != 1) // Attempt to deal with incompatibility with prior versions
	{
	_pin = channel;
	channel = 0;
	}

You probably mean _datalog_period_in_seconds here:

EmonLibCM/emonLibCM.cpp

Lines 325 to 326 in 23ca81e

	if (datalog_period_in_seconds < 0.1)
	datalog_period_in_seconds = 0.1;