BLE Data Module could be widely used in all kinds of IOT devices, such as Smart Home Appliances, Wearable Devices, Smart Fitness Devices, Outdoor Electronics Equipments, etc. It’s small size, low energy consumption and has strong anti-interference ability. By crossing connect the RX and TX of your MCU to the TX and RX of the BLE Module, you could communicate with APPs in smart phones through BLE Technology simply.