Implementation of LoRa End-Device in Sensor Network System for Indoor Application

In LoRa network architecture, the End Device functions as a node that is connected to sensors and other interfaces which then transmit data to the gateway, and to be forwarded to the Network Server. This paper implement LoRa on a sensor network, considering its several advantages, has long range distance up to 1 km, low energy consumption, and data received in json format string. The experiment is conducted to test the performance of single LoRa End Device in transmitting the data sensor to the monitoring center. The testing is done in indoor, with 3 meter distance between end device node and gateway. The Antares.id application is used as a dashboard for data presentation. The test is done using two different type of data string. The size of data memory depends on the number of data strings sent. The more number of data strings sent will increase the capacity of data and increasing power consumption. Data from sensor is successfully sent by LoRa transceiver to the gateway, although there is a data transmission error of about 14,9%. Some parameters that can be adjusted to improve the system performance include the channel frequency, number of data string bits, and also interval time of data transmission, which can be adjusted following to the characteristics of the sensing parameters.