1. An arrangement comprising: a plurality of wireless microsystems, each microsystem operable to measure at least relative humidity and temperature, and to communicate temperature and relative humidity information indicative of the measured relative humidity and temperature wirelessly to a network device, the network device operable to communicate the temperature and relative humidity information to at least a first processor configured to: a) obtain a comfort level value based on the measurements of relative humidity and temperature, b) determine if the comfort level value is within a first predefined range, c) cause a first change in at least one building control parameter if the comfort level is outside the first predefined range, d) determine if the comfort level value is within a second range, and e) cause a second change in the at least one building control parameter if the comfort level is within the second range and within the first predefined range.