Air Quality Monitoring Station Using the Internet of Things with LoRa Technology and Extending the Transmission Distance Through Repeaters
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Abstract
Nowadays, the LoRa technology for the Internet of Things (IoT) is designed to fulfil the requirements of long-range data transmission, capable of covering distances of up to 1 kilometer in unobstructed environments. However, when desiring to cover a greater distance, certain constraints come into play that the system is incapable of accommodating. Therefore, the present study encompasses the development of a repeater system utilizing LoRa technology with the aim of extending the transmission range for the purpose of transmitting data from air quality monitoring stations. The repeater system functions within two distinct frequency bands, specifically 923.2 MHz and 923.4 MHz. Based on the results, the signal strength observed between the air quality monitoring station and the repeater exhibited a range spanning from -84 dBm to -92 dBm. The study looked at the indicator level value of the signal strength that the device received from the transmitter in the context of the LoRa repeater device and the LoRa network. The experimental findings revealed that the average signal level ranged between -69 dBm and -112 dBm. Additionally, the results indicated that the average signal delay was measured at 5,000 ms.
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