A method and device for measuring the wall thickness of a pipe in a pipe-rolling mill wherein a Fabry-P\xe9rot interfero-meter has its mirror spacing set by providing an input to a linear activity for one of the mirrors from a controller receiving an input from a photodiode at the output side of the interferometer. Such prioritization may comprise a better level of service, more timely system response andor preferential treatment of traffic. Methods for producing a maize plant that comprises crossing hybrid maize variety X00C222 with another maize plant. Attachment of the module causes the electronic device to operate in the low power mode. The management of the classfile database on the embedded device is independent of the virtual machine on the embedded device. It further comprises a lid for covering the body of said measuring device.