Abstract
This paper presents wireless integrated compact, lightweight and portable printed circuit board (PCB) device of air quality monitoring system (AQMS). The system is fabricated in double-sided three PCBs to observe real-time data of CO2, CO, NO2 and weather parameters. For the convenience of 3D stacking, the PCB design is built on three boards so that it consumes minimum area. The volume of the entire board is found 110 mm × 80 mm × 24 mm. Strategy of power reduction has been adopted in the design. To reduce power consumption, switching technique is applied to the electronic sensors. This technique is controlled by the use of demultiplexer device. This low power switching technique enhances the battery life of the AQMS structure has been enhanced. Experimental results show that with the chosen batery bank, average power is 1.0588992 Watt during runtime operation of the device. Thus, AQMS runs in safe mode for 33.75 hours continuously using a fully charged power bank. Electrostatic discharge (ESD) protection has been introduced in the PCB to prevent the circuit damage from high voltage during data transmission. The system is capable of being powered by natural resources such as the solar system, which is installed to charge lithium-ion battery. Moreover, the physical weight of the fabricated device is 172gm excluding the weight of the package.
IoT deployment for city scale air quality monitoring with Low-Power Wide Area Networks