This prototype is a battery-less and maintenance free wireless monitoring device which is able to monitor machinery vibration and trigger an alarm if the vibration level exceed a pre-defined safety level. The ambient vibration is the energy source that would be transformed into electrical energy and powering up the electric component in the wireless sensor module. As it self-powered by the ambient energy sources, therefore it is sustainable, free from maintenance and have longer life-span than a battery powered electronic device. The data that transmitted wirelessly will be stored in the computer cloud and can be assessible via android apps for the application of Internet-of-things (IoT)