Fig. 4

Front Heltec LoRa 32. While there are many types of LoRa, the one used in this study was Heltec LoRa 32. It has three wireless features: Bluetooth 4.2, Wi-Fi 802.11, and the LoRa, and all of this can be used simultaneously. This type of network with a reach of 3.6 km is through a simple antenna