Abstract: The present invention describes a gateway device (100, 100a) for wirelessly connecting IoT sensors, actuators or devices (150, 151, 152, etc.) and aggregating the sensor/actuator/device data into data packages (160); these sensor connections use short range (SR) wireless communication, which includes Bluetooth, BLE, Zigbee, NFC or similar wireless technology. The data packages (160) are then transmitted to a monitor centre (190) at predetermined time intervals via a low power, long range (LR), wireless wide area network (LPWAN), which includes NB-IoT, Sigfox, LoRa or similar wireless technology. BLE standard is modified to further reduce battery power consumption for use in the gateway device. In addition, scheduling of SR and LR transmissions averts wireless interference.