The present disclosure relates to user equipment for, a communication method of, a program for, and a communication system for starting wireless communication among pieces of user equipment without placing operational load on a user. Also provided are environment sensors fabricated, for example, by the method, and a measurement system using the environment sensors fabricated by the method. Because it does not relay on any local equipment, cellular or any local network it can therefore can be used anywhere in the world. In addition to pectin having a moisture-preserving effect and being able to be used for acidifying or for regulating the pH, it is a well known substance, which is preferred for its good skin compatibility, and can readily adhere to, and interact with, skin and mucous membranes. By decreasing the current of the receiver circuits a dissipation loss of the integrated semiconductor memory device is reduced.