equipment , purchase of equipments , arduino nano esp32 • dual-core 32-bit lx7 microprocessor • operating voltage - 3.3v • wi-fi & bluetooth connectivity , raspberry pi model 5 • broadcom bcm2712 2.4ghz quad-core 64-bit arm cortex-a76 cpu with cryptographic extension • 512kb per-core l2 caches & 2mb shared l3 cache • bluetooth 5.0 & microsd card slot , gsm module sima7670e • size (35 x 50 mm) • lte cat1 wireless communication module with 4g data • gsm/gprs with power: 3.8 v • interfaces: 1x power button, 1x bat, 1x uart, 1x usb-c, 1x sim card slot , co sensor – spec110-1xx • size (20 x 20 x 4 mm) • 0 – 1000 ppm measuring range with <60 sec response time • sensitivity range – 4.75 + 2.75 na/ppm • operating temperature range -30 to 55 0c , co2 sensor – scd 30 • size (35×23×7 mm) • measuring range 400 ppm – 10.000 ppm • operating temperature range 0 to 50 0c • digital interface uart or i2c , nox sensor – dfrobot fermion mems • size (12×16 mm) • detection of h2, no2, no concentration with i2c digital output • measuring range h2 (1 – 1000 ppm), no2 (0.05 – 10 ppm) • working temperature -30 to 85 0c , pm 2.5 sensor – pms5003 • size (50×38×21 mm) • pm1.0, pm2.5, pm10 concentration output (?g/m³) • effective range: 0–500 ?g/m³ • storage temperature range -40 to 80 0c , hc sensor – adafruit mics-5524 • size (5 x 7 x 1.55 mm) • target gases - ethanol c2h6oh 10 – 500 ppm, hydrogen h2 1 – 1000 ppm, ammonia nh3 1 – 500 ppm, methane ch4 >1000 ppm • operating temperature -30 to 85 0c