There is a diversity of vending machines since the trend of new retail is increasing, and gravity sensing vending machine is included. Gravity sensor relies on the transducer under the tray which carries the products, once the product is taken, the transducer will send the signal from the position to APLEX’s IIoT gateway. To distinguish which product you take through weight sensor and the action of taking and putting back, this method will highly decrease the cost than labeling products by reducing labor cost.